CN102480230A - Control method and device for three-phase switching power supply and three-phase switching power supply - Google Patents
Control method and device for three-phase switching power supply and three-phase switching power supply Download PDFInfo
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Abstract
The invention discloses a control method and device for a three-phase switching power supply and the three-phase switching power supply, and relates to the technical field of three-phase power supply. The embodiment of the invention provides the control method for the three-phase switching power supply. The control method comprises the following steps of: setting a high-frequency switching converter to be a synchronous working mode; acquiring an input parameter, an output parameter and an input absolute value current reference signal; judging whether the high-frequency switching converter needs to perform maximum pulse width modulation according to the input parameter and the output parameter; and performing real-time pulse width modulation according to the input parameter and transforming, rectifying and outputting the high-frequency alternating pulse signal which is subjected to the pulse width modulation. By using the embodiment of the invention, the aim of reducing the implementation difficulty in correcting the existing power factor of the three-phase switching power supply and adjusting output voltage and the complexity of a control process thereof can be fulfilled.
Description
Technical field
The present invention relates to the three phase mains technical field, relate in particular to a kind of control method, device and a kind of threephase switch power supply of threephase switch power supply.
Background technology
Along with improving constantly of power electronic technology, the effect of threephase switch power supply also constantly improves thereupon.Wherein, have power factor correction (Power Factor Correction is called for short PFC) circuit in the threephase switch power supply.Said pfc circuit can effectively suppress harmonic wave.
Common said pfc circuit can be divided into according to input voltage: Single-phase PFC circuit and three-phase pfc circuit.Wherein, the Single-phase PFC technology of realization Single-phase PFC circuit is comparative maturity, existing many business-like special integrated circuits, and like UC3854, IR1150, LT1508, ML4819.Compare with the Single-phase PFC circuit, the three-phase pfc circuit has more advantages, and for example: input power is high, and power rating can reach more than several kilowatts; The input power of Single-phase PFC circuit is one and doubles the amount that power frequency changes.But in the three-phase pfc circuit, the summation of three-phase input power pulsation part is zero, and input power is a steady state value, and the pulsation period of three-phase pfc circuit power output is merely 1/3rd of single-phase full wave rectification, and ripple factor is low.Therefore, the less output capacitance of capacity can be used, thereby output voltage dynamic response faster can be realized.
But, in the design and control procedure that realize threephase switch power supply of the prior art, find that threephase switch power supply realization difficulty used in the prior art is bigger, control procedure is complicated.
Summary of the invention
Embodiments of the invention provide a kind of control method, device and a kind of threephase switch power supply of threephase switch power supply, with the purpose of the complexity of the realization difficulty that realize to reduce the threephase switch power supply and control procedure thereof.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of control method of threephase switch power supply comprises:
It is the synchronous working mode that the HF switch converter is set;
Obtain input parameter, output parameter and input absolute value current reference signal;
According to said input and output parameter, judge whether said HF switch converter need carry out the maximum pulse width modulation;
If desired, carry out real-time pulse-width modulation, and the high frequency alternating impulse signal after the pulse-width modulation is exported through transformation, rectification according to input parameter.
A kind of control device of threephase switch power supply comprises:
Parameter acquiring unit is used for when the HF switch converter being set being the synchronous working mode, obtains input parameter, output parameter and input absolute value current reference signal;
Judging unit is used for according to said input and output parameter, judges whether said HF switch converter need carry out the maximum pulse width modulation;
Pwm unit is used for according to input parameter said input absolute value current reference signal being carried out pulse-width modulation, and the high frequency alternating impulse signal after the pulse-width modulation is exported through transformation, rectification.
A kind of threephase switch power supply comprises: full bridge rectifier, input filter circuit, HF switch converter, rectification circuit and filtering output circuit;
Said full bridge rectifier is used for the sinusoidal wave direct current of absolute value of the sine wave AC electric rectification single direction of input and the absolute value current reference signal is provided;
Said input filter circuit is used for said input absolute value current reference signal is carried out Filtering Processing and the high-frequency pulse current that the HF switch converter produces is carried out filtering so that satisfy electromagnetic compatibility requirements;
Said HF switch converter is used for the HF switch converter is carried out pulse-width modulation, and the realization power supply is followed the tracks of promptly said input absolute value current reference signal output voltage is adjusted;
Said rectification circuit is used for high frequency alternating impulse signal after the said pulse-width modulation is carried out rectification;
Said filtering output circuit is used for the signal after the said rectification processing is carried out filtering output.
The control method of a kind of threephase switch power supply that the embodiment of the invention provides, device and a kind of threephase switch power supply are the synchronous working mode through the HF switch converter is set, and make that three branch roads can carry out the maximum pulse width modulation synchronously in the threephase switch power supply; Through obtaining input parameter, output parameter and input absolute value current reference signal; According to said input and output parameter, judge whether said HF switch converter need carry out the maximum pulse width modulation; As required, pwm unit is controlled said HF switch converter and according to input parameter said input absolute value current reference signal is carried out the maximum pulse width modulation, and the current pulse signal after the pulse-width modulation is exported through rectification.Like this; The threephase switch power supply that the embodiment of the invention provides combines its control method not only can accomplish power factor correction through the HF switch converter; And adjustment output direct current signal; Thereby reduced the realization difficulty of threephase switch power supply, simplified the control procedure complexity of said threephase switch power supply.
Description of drawings
The control method flow chart of a kind of threephase switch power supply that Fig. 1 provides for the embodiment of the invention;
The control method flow chart of the another kind of threephase switch power supply that Fig. 2 provides for the embodiment of the invention;
The structural representation of the control device of a kind of threephase switch power supply that Fig. 3 provides for the embodiment of the invention;
The structural representation of a kind of threephase switch power supply that Fig. 4 provides for the embodiment of the invention;
The structural representation of the another kind of threephase switch power supply that Fig. 5 provides for the embodiment of the invention;
A kind of HF switch converter that Fig. 6 provides for the embodiment of the invention is three groups of full bridge switching circuits, the circuit diagram of the threephase switch power supply of secondary output series connection;
The another kind of HF switch converter that Fig. 7 provides for the embodiment of the invention is three groups of full bridge switching circuits, the circuit diagram of the threephase switch power supply of secondary output series connection;
A kind of HF switch converter that Fig. 8 provides for the embodiment of the invention is three groups of full bridge switching circuits, the circuit diagram of the threephase switch power supply of secondary output-parallel;
Fig. 9 is the forward converter circuit for a kind of HF switch converter that the embodiment of the invention provides, the circuit diagram of the threephase switch power supply of secondary output series connection;
Figure 10 is the forward converter circuit for a kind of HF switch converter that the embodiment of the invention provides, the circuit diagram of the threephase switch power supply of secondary output-parallel;
The oscillogram of impulse waveform VL after a kind of rectification that Figure 11 provides for the embodiment of the invention;
The oscillogram of impulse waveform VL after the another kind of rectification that Figure 12 provides for the embodiment of the invention.
Embodiment
Control method, device and a kind of threephase switch power supply of a kind of threephase switch power supply that the embodiment of the invention is provided below in conjunction with accompanying drawing are described in detail.
As shown in Figure 1, the control method of a kind of threephase switch power supply that provides for the embodiment of the invention, this method comprises:
101: it is the synchronous working mode that the HF switch converter is set.
102: obtain input parameter, output parameter and input absolute value current reference signal; Wherein, said input parameter comprises: the input voltage signal parameter; Said output parameter comprises: output voltage signal parameter, output current signal parameter, output loading parameter; Said input absolute value current reference signal is that absolute value is sinusoidal wave.
103:, judge whether said HF switch converter need carry out the maximum pulse width modulation according to said input and output parameter; Just confirm the maximum pulse width Dmax that said HF switch converter need be modulated; For example: when said input voltage signal parameter is the input voltage envelope; Output parameter is an output voltage signal; When input absolute value current reference signal is the absolute value sine wave; Whether the control device of threephase switch power supply will descend according to output voltage, judge whether said HF switch converter need carry out the maximum pulse width modulation; If said output voltage descends, explain that then load increases, need carry out the pulsewidth adjustment to input absolute value sine-wave current signal through the HF switch converter, with importing the pulse width modulated of absolute value sine-wave current signal; If said output voltage rises, explain that then load reduces, need carry out the pulsewidth adjustment to input absolute value sine-wave current signal through the HF switch converter, transfer the pulse of input absolute value sine-wave current signal narrow.
104: said as required HF switch converter carries out real-time pulse-width modulation according to input parameter to said input absolute value current reference signal, and the current pulse signal after the pulse-width modulation is exported through rectification.For example: said HF switch converter carries out the real-time tracking pulse-width modulation to the absolute value current reference signal; Pulsewidth Da (n)=Dmax*|SIN ((n*180 °/N)-Φ i) |, n=1 wherein, 2 ... N; I=a, b, c; Φ i is the phase difference of i phase, and N is the pulse train number of absolute value sine wave in 180 °, and the current pulse signal after the pulse-width modulation is exported through rectification.
Need to prove that said HF switch converter can be three groups of full-bridge converters (switching circuit), perhaps is three groups of forward converter circuit.
What also be worth explanation is that said threephase switch power supply can perhaps not have the center line AC input modes for three-phase for three-phase band center line AC input modes.
As shown in Figure 2, the control method of the another kind of threephase switch power supply that provides for the embodiment of the invention, this method comprises:
201: it is the synchronous working mode that the HF switch converter is set, and said HF switch converter is set is the phase shift type of drive.
202: obtain input parameter, output parameter and input absolute value current reference signal.Wherein, said input parameter comprises: the input voltage signal parameter; Said output parameter comprises: output voltage signal parameter, output current signal parameter, output loading parameter; Said input absolute value current reference signal is that absolute value is sinusoidal wave.
203:, judge whether said HF switch converter need carry out the maximum pulse width modulation according to said input and output parameter; For example: when said input voltage signal parameter is the input voltage envelope; Output parameter is an output voltage signal; When input absolute value current reference signal is the absolute value sine wave; Whether the control device of threephase switch power supply will descend according to output voltage, judge whether said HF switch converter need carry out the maximum pulse width modulation; If said output voltage descends, explain that then load increases, need carry out the pulsewidth adjustment to input absolute value sine-wave current signal through the HF switch converter, with importing the pulse width modulated of absolute value sine-wave current signal; If said output voltage rises, explain that then load reduces, need carry out the pulsewidth adjustment to input absolute value sine-wave current signal through the HF switch converter, transfer the pulse of input absolute value sine-wave current signal narrow.
204: said as required HF switch converter, carry out pulse-width modulation according to input parameter to said input absolute value current reference signal, and the current pulse signal after the pulse-width modulation exported through rectification.
As shown in Figure 3, the control device of a kind of threephase switch power supply that provides for the embodiment of the invention, this device comprises:
It should be noted that it is the phase shift type of drive that said HF switch converter is set when series connection output is adopted in the transformer secondary output output of said threephase switch power supply.
As shown in Figure 4, be a kind of threephase switch power supply that the embodiment of the invention provides, this power supply comprises: full bridge rectifier 401, input filter circuit 402, HF switch converter 403, rectification circuit 404 and filtering output circuit 405;
Said full bridge rectifier 401 is used for the sinusoidal wave direct current of absolute value of the sine wave AC electric rectification single direction of input and the absolute value current reference signal is provided;
Said input filter circuit 402 is used for said input absolute value current reference signal is carried out Filtering Processing and the high-frequency pulse current that the HF switch converter produces is carried out filtering so that satisfy electromagnetic compatibility requirements;
Said HF switch converter 403 is used for the HF switch converter is carried out pulse-width modulation, and the realization power supply is followed the tracks of promptly said input absolute value current reference signal output voltage is adjusted;
Said rectification circuit 404 is used for high frequency alternating impulse signal after the said pulse-width modulation is carried out rectification;
Said filtering output circuit 405 is used for the signal after the said rectification processing is carried out filtering output.
Need to prove that said HF switch converter is three groups of full-bridge switch translation circuits, perhaps is three groups of forward converter circuit.Said HF switch converter and rectification circuit can also adopt and be connected in parallel, and perhaps adopt to be connected in series.
It is also to be noted that described threephase switch power supply also comprises: the control device 500 of above-described threephase switch power supply; As shown in Figure 5, the control device of said threephase switch power supply can be provided with through the HF switch converter is carried out the synchronous working mode; Obtain input parameter, output parameter and input absolute value current reference signal through parameter acquiring unit; Come according to said input and output parameter through judging unit, judge whether said HF switch converter need carry out the maximum pulse width modulation; According to input parameter said input absolute value current reference signal is carried out pulse-width modulation through pwm unit, and the current pulse signal after the pulse-width modulation is exported through transformation, rectification.
What need say is that said HF switch converter is three groups of full-bridge switch translation circuits, perhaps is three groups of forward converter circuit.Said HF switch converter and said rectifying output circuit adopt and are connected in parallel, and perhaps adopt to be connected in series.
As shown in Figure 6; The circuit diagram of the threephase switch power supply of a kind of secondary output series connection that provides for the embodiment of the invention, this power circuit comprises: the control device of full bridge rectifier, input filter circuit, HF switch converter, rectification circuit and filtering output circuit, threephase switch power supply.If the HF switch converter using three phase full bridge circuit in the threephase switch power supply of said secondary output series connection; The series system that has diode is adopted in said secondary output;
Wherein, said full bridge rectifier comprises: the first full-bridge circuit DB1, the second full-bridge circuit DB2, the 3rd full-bridge circuit DB3.
Said input filter circuit comprises: first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3.
Said HF switch converter comprises: the first HF switch group, the second HF switch group and the 3rd HF switch group; Wherein, the said first HF switch group comprises: the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the 3rd metal-oxide-semiconductor Q3, the 4th metal-oxide-semiconductor Q4; The said second HF switch group comprises: the 5th metal-oxide-semiconductor Q5, the 6th metal-oxide-semiconductor Q6, the 7th metal-oxide-semiconductor Q7, the 8th metal-oxide-semiconductor Q8; Said the 3rd HF switch group comprises: the 9th metal-oxide-semiconductor Q9, the tenth metal-oxide-semiconductor Q10, the 11 metal-oxide-semiconductor Q11, the 12 metal-oxide-semiconductor Q12.
Said rectification circuit comprises: the first rectification branch road, the second rectification branch road and the 3rd rectification branch road; Wherein, the said first rectification branch road comprises: the first transformer T1, the first diode D1 and the second diode D2; The said second rectification branch road comprises: the second transformer T2, the 3rd diode D3 and the 4th diode D4; The 3rd rectification branch road comprises: the 3rd transformer T3, the 5th diode D5 and the 6th diode D6.
Said filtering output circuit comprises: first inductance L 1, the 7th diode D7 and the 4th capacitor C 4.
The input A of said threephase switch power supply, N link to each other with two inputs of said DB1 respectively, and two outputs of said DB1 link to each other with said C1 two ends respectively; The drain electrode of said Q1 links to each other with the anode of said C1, and source electrode links to each other with the elementary terminal 1 of the drain electrode of said Q2, said T1 respectively, and grid links to each other with the control device of said threephase switch power supply; The source electrode of said Q2 links to each other with the negative terminal of said C1, the source electrode of said Q4 respectively, and grid links to each other with the control device of said threephase switch power supply; The drain electrode of said Q3 links to each other with the anode of said C1, and source electrode links to each other with the elementary terminal 2 of the drain electrode of said Q4, said T1 respectively, and grid links to each other with the control device of said threephase switch power supply; The source electrode of said Q4 links to each other with the negative terminal of said C1, and grid links to each other with the control device of said threephase switch power supply.The secondary terminal 3 of said T1 links to each other with said D1 anode; The secondary terminal 4 of said T1 is with after terminal 5 links to each other, and the negative terminal with said D3 and D4 links to each other respectively; The secondary terminal 6 of said T1 links to each other with said D2 anode; The negative terminal of said D1 links to each other with said L1 one end with after the negative terminal of said D2 links to each other.
The input B of said threephase switch power supply, N link to each other with two inputs of said DB2 respectively, and two outputs of said DB2 link to each other with said C2 two ends respectively; The drain electrode of said Q5 links to each other with the anode of said C2, and source electrode links to each other with the elementary terminal 1 of the drain electrode of said Q6, said T2 respectively, and grid links to each other with the control device of said threephase switch power supply; The source electrode of said Q6 links to each other with the negative terminal of said C2, the source electrode of said Q8 respectively, and grid links to each other with the control device of said threephase switch power supply; The drain electrode of said Q7 links to each other with the anode of said C2, and source electrode links to each other with the elementary terminal 2 of the drain electrode of said Q8, said T2 respectively, and grid links to each other with the control device of said threephase switch power supply; The source electrode of said Q8 links to each other with the negative terminal of said C2, and grid links to each other with the control device of said threephase switch power supply.The secondary terminal 3 of said T2 links to each other with said D3 anode; The secondary terminal 4 of said T2 is with after terminal 5 links to each other, and the negative terminal with said D5 and D6 links to each other respectively; The secondary terminal 6 of said T2 links to each other with said D4 anode.
The input C of said threephase switch power supply, N link to each other with two inputs of said DB3 respectively, and two outputs of said DB3 link to each other with said C3 two ends respectively; The drain electrode of said Q9 links to each other with the anode of said C3, and source electrode links to each other with the elementary terminal 1 of the drain electrode of said Q10, said T3 respectively, and grid links to each other with the control device of said threephase switch power supply; The source electrode of said Q10 links to each other with the negative terminal of said C3, the source electrode of said Q12 respectively, and grid links to each other with the control device of said threephase switch power supply; The drain electrode of said Q11 links to each other with the anode of said C3, and source electrode links to each other with the elementary terminal 2 of the drain electrode of said Q12, said T3 respectively, and grid links to each other with the control device of said threephase switch power supply; The source electrode of said Q12 links to each other with the negative terminal of said C3, and grid links to each other with the control device of said threephase switch power supply.The secondary terminal 3 of said T3 links to each other with said D5 anode; The secondary terminal 4 of said T3 links to each other with said D7 anode with after terminal 5 links to each other; The secondary terminal 6 of said T3 links to each other with said D6 anode; Said D7 negative terminal links to each other with said L1 one end; Said C4 two ends link to each other with the other end of said D7 anode, said L1 respectively.
Need to prove, when said outputting inductance L1 works in continuous conduction mode (CCM), its approximate constant-current source, and said inductance L 1 is big more, and the output direct current signal is steady more.For example: establishing Va＞Vb＞Vc is the sine wave after the rectification, and promptly absolute value is sinusoidal wave; Transformer T1, T2, the no-load voltage ratio of T3 is 1: N; If said HF switch converter using pulse front edge synchronous working mode is carried out the PWM modulation; Like this; Obtain input parameter, output parameter and input absolute value current reference signal through parameter acquiring unit in the control device of said threephase switch power supply; According to said input and output parameter, judge whether said HF switch converter need carry out the maximum pulse width modulation by judging unit; Said as required HF switch converter carries out pulse-width modulation according to input parameter to said input absolute value current reference signal, and the current pulse signal after the pulse-width modulation is exported through transformation, rectification.Wherein, shown in figure 12 through the waveform of the impulse waveform VL after the rectification, wherein, and corresponding input A, the rectification output VL output pulse width of N is Da; Corresponding input B, the rectification output VL output pulse width of N is Db; Corresponding input C, the rectification output VL output pulse width of N is Dc; Owing to establish Va＞Vb＞Vc, then Da＞Db＞Dc this moment.
What be worth explanation is; Because the threephase switch power supply that the embodiment of the invention provides adopts the control method of threephase switch power supply to control; So the HF switch converter of threephase switch power supply can carry out the pulsewidth adjustment according to input voltage; Make the envelope of input current and the sine wave of input voltage be consistent, thereby can accomplish power factor correction.
As shown in Figure 7; The another kind of HF switch converter that provides for the embodiment of the invention is three groups of full-bridge switch translation circuits; The circuit diagram of the threephase switch power supply of secondary output series connection, this power circuit comprises: the control device of full bridge rectifier, input filter circuit, HF switch converter, rectification circuit and filtering output circuit, threephase switch power supply.If the HF switch converter using three phase full bridge circuit in the threephase switch power supply of said secondary output series connection; The series system with diode is adopted not in said secondary output.
Wherein, said full bridge rectifier comprises: the first full-bridge circuit DB1 ', the second full-bridge circuit DB2 ', the 3rd full-bridge circuit DB3 '.
Said input filter circuit comprises: first capacitor C 1 ', second capacitor C 2 ', the 3rd capacitor C 3 '.The effect of C1, C2, C3 is that the dither electric current that full-bridge circuit produces is carried out filtering, also can adopt LC or multistage LC filter circuit that the dither electric current that full-bridge circuit produces is carried out filtering.
Said HF switch converter comprises: the first HF switch group, the second HF switch group and the 3rd HF switch group; Wherein, the said first HF switch group comprises: the first metal-oxide-semiconductor Q1 ', the second metal-oxide-semiconductor Q2 ', the 3rd metal-oxide-semiconductor Q3 ', the 4th metal-oxide-semiconductor Q4 '; The said second HF switch group comprises: the 5th metal-oxide-semiconductor Q5 ', the 6th metal-oxide-semiconductor Q6 ', the 7th metal-oxide-semiconductor Q7 ', the 8th metal-oxide-semiconductor Q8 '; Said the 3rd HF switch group comprises: the 9th metal-oxide-semiconductor Q9 ', the tenth metal-oxide-semiconductor Q10 ', the 11 metal-oxide-semiconductor Q11 ', the 12 metal-oxide-semiconductor Q12 '.
Said rectification circuit comprises: the first rectification branch road, the second rectification branch road and the 3rd rectification branch road; Wherein, the said first rectification branch road comprises: the first transformer T1 ', the first diode D1 ' and the second diode D2 '; The said second rectification branch road comprises: the second transformer T2 '; The 3rd rectification branch road comprises: the 3rd transformer T3 '.
Said filtering output circuit comprises: first inductance L 1 ', the 7th diode D7 ' and the 4th capacitor C 4 '.
The input A of said threephase switch power supply, N link to each other with two inputs of said DB1 ' respectively, and two outputs of said DB1 ' link to each other with said C1 ' two ends respectively; The drain electrode of said Q1 ' links to each other with the anode of said C1 ', and source electrode links to each other with the elementary terminal 1 of the drain electrode of said Q2 ', said T1 ' respectively, and grid links to each other with the control device of said threephase switch power supply; The source electrode of said Q2 ' links to each other with the negative terminal of said C1 ', the source electrode of said Q4 ' respectively, and grid links to each other with the control device of said threephase switch power supply; The drain electrode of said Q3 ' links to each other with the anode of said C1 ', and source electrode links to each other with the elementary terminal 2 of the drain electrode of said Q4 ', said T1 ' respectively, and grid links to each other with the control device of said threephase switch power supply; The source electrode of said Q4 ' links to each other with the negative terminal of said C1 ', and grid links to each other with the control device of said threephase switch power supply.The secondary terminal 3 of said T1 ' links to each other with said D1 ' anode; The secondary terminal 4 of said T1 ' links to each other with the secondary terminal 3 of T2 '; The secondary terminal 5 of said T1 ' links to each other with the secondary terminal 6 of T2 '; The secondary terminal 6 of said T1 ' links to each other with said D2 ' anode; The negative terminal of said D1 ' links to each other with a said L1 ' end with after the negative terminal of said D2 ' links to each other.
The input B of said threephase switch power supply, N link to each other with two inputs of said DB2 ' respectively, and two outputs of said DB2 ' link to each other with said C2 ' two ends respectively; The drain electrode of said Q5 ' links to each other with the anode of said C2 ', and source electrode links to each other with the elementary terminal 1 of the drain electrode of said Q6 ', said T2 ' respectively, and grid links to each other with the control device of said threephase switch power supply; The source electrode of said Q6 ' links to each other with the negative terminal of said C2 ', the source electrode of said Q8 ' respectively, and grid links to each other with the control device of said threephase switch power supply; The drain electrode of said Q7 ' links to each other with the anode of said C2 ', and source electrode links to each other with the elementary terminal 2 of the drain electrode of said Q8 ', said T2 ' respectively, and grid links to each other with the control device of said threephase switch power supply; The source electrode of said Q8 ' links to each other with the negative terminal of said C2 ', and grid links to each other with the control device of said threephase switch power supply.The secondary terminal 4 of said T2 ' links to each other with the secondary terminal 3 of T3 '; The secondary terminal 5 of said T2 ' links to each other with the secondary terminal 6 of T3 '.
The input C of said threephase switch power supply, N link to each other with two inputs of said DB3 ' respectively, and two outputs of said DB3 ' link to each other with said C3 ' two ends respectively; The drain electrode of said Q9 ' links to each other with the anode of said C3 ', and source electrode links to each other with the elementary terminal 1 of the drain electrode of said Q10 ', said T3 ' respectively, and grid links to each other with the control device of said threephase switch power supply; The source electrode of said Q10 ' links to each other with the negative terminal of said C3 ', the source electrode of said Q12 ' respectively, and grid links to each other with the control device of said threephase switch power supply; The drain electrode of said Q11 ' links to each other with the anode of said C3 ', and source electrode links to each other with the elementary terminal 2 of the drain electrode of said Q12 ', said T3 ' respectively, and grid links to each other with the control device of said threephase switch power supply; The source electrode of said Q12 ' links to each other with the negative terminal of said C3 ', and grid links to each other with the control device of said threephase switch power supply.The secondary terminal 4 of said T3 ' links to each other with said D7 ' anode with after terminal 5 links to each other; Said D7 negative terminal links to each other with a said L1 ' end; Said C4 ' two ends link to each other with the other end of said D7 ' anode, said L1 ' respectively.
Need to prove, when said outputting inductance L1 ' works in continuous conduction mode (CCM), its approximate constant-current source, and said inductance L 1 ' big more, the output direct current signal is steady more.For example: establishing Va＞Vb＞Vc is the sine wave after the rectification, and promptly absolute value is sinusoidal wave; Transformer T1 ', T2 ', the no-load voltage ratio of T3 ' is 1: N; If said HF switch converter using pulse front edge synchronous working mode, and its type of drive employing phase shift type of drive are carried out the PWM modulation; Like this; Obtain input parameter, output parameter and input look to the value current reference signal through parameter acquiring unit in the control device of said threephase switch power supply; According to said input and output parameter, judge whether said HF switch converter need carry out the maximum pulse width modulation by judging unit; As required, pwm unit is controlled said HF switch converter and according to input parameter said input absolute value current reference signal is carried out pulse-width modulation, and the current pulse signal after the pulse-width modulation is exported through transformation, rectification.Wherein, said HF switch converter using pulse front edge synchronous working mode, and its type of drive adopts the phase shift type of drive specifically can be following example:
As establish on the left brachium pontis pipe synchronously, promptly Q1 ', Q5 ', Q9 ' are synchronous, then Q1 ' and Q2 ' open 180 ° of phasic differences mutually, Q3 also is 180 ° with the phasic difference mutually of opening of Q4; Q1 ' is 0 o'clock with the phasic difference mutually of opening of Q3 '; Pulse voltage width with respect to the transformer two ends is 0; Q1 ' and Q3 ' open phasic difference mutually when being 180 °; Pulse voltage width with respect to the transformer two ends is 180 °, is the maximum pulse duty ratio, and Q1 ' and Q3 ' open phasic difference mutually when being 10 °; Pulse voltage width with respect to the transformer two ends is 10 °; The phase difference of opening that is to say the cornerwise switching tube metal-oxide-semiconductor in the said HF switch converter is 10 °, and the phase difference of opening of the switching tube metal-oxide-semiconductor of same brachium pontis is 180 °.
Wherein, shown in figure 13 through the waveform of the impulse waveform VL after the rectification, wherein, and corresponding input A, the actual output pulse width of the rectification output VL of N is Da_act; Corresponding input B, the actual output pulse width of the rectification output VL of N is Db_act; Corresponding input C, the actual output pulse width of the rectification output VL of N is Dc_act; Va, Vb, Vc are the synchronous output pulse width of pulse front edge.Since establish this moment Va＞Vb＞Vc and for pulse front edge synchronous, Dc＞Db＞Da then, Da_act＞Db_act＞Dc_act.
What be worth explanation is; Because the threephase switch power supply that the embodiment of the invention provides adopts the control method of threephase switch power supply to control; So the HF switch converter of threephase switch power supply can carry out the pulsewidth adjustment according to input voltage; Make the envelope of input current and the sine wave of input voltage be consistent, thereby can accomplish power factor correction.
As shown in Figure 8; A kind of HF switch converter that provides for the embodiment of the invention is three groups of full-bridge switch translation circuits; The circuit diagram of the threephase switch power supply of secondary output-parallel, the circuit of this power supply comprises: the control device of full bridge rectifier, input filter circuit, HF switch converter, rectification circuit and filtering output circuit, threephase switch power supply.
Wherein, said full bridge rectifier comprises: the first full-bridge circuit DB1 ", the second full-bridge circuit DB2 ", the 3rd full-bridge circuit DB3 ".
Said input filter circuit comprises: first capacitor C 1 ", second capacitor C 2 ", the 3rd capacitor C 3 ".
Said HF switch converter comprises: the first HF switch group, the second HF switch group and the 3rd HF switch group; Wherein, the said first HF switch group comprises: the first metal-oxide-semiconductor Q1 ", the second metal-oxide-semiconductor Q2 ", the 3rd metal-oxide-semiconductor Q3 ", the 4th metal-oxide-semiconductor Q4 "; The said second HF switch group comprises: the 5th metal-oxide-semiconductor Q5 ", the 6th metal-oxide-semiconductor Q6 ", the 7th metal-oxide-semiconductor Q7 ", the 8th metal-oxide-semiconductor Q8 "; Said the 3rd HF switch group comprises: the 9th metal-oxide-semiconductor Q9 ", the tenth metal-oxide-semiconductor Q10 ", the 11 metal-oxide-semiconductor Q11 ", the 12 metal-oxide-semiconductor Q12 ".
Said rectification circuit comprises: the first rectification branch road, the second rectification branch road and the 3rd rectification branch road; Wherein, the said first rectification branch road comprises: the first transformer T1 ", the first diode D1 " with the second diode D2 "; The said second rectification branch road comprises: the second transformer T2 ", the 3rd diode D3 " with the 4th diode D4 "; The 3rd rectification branch road comprises: the 3rd transformer T3 ", the 5th diode D5 " with the 6th diode D6 ".
Said filtering output circuit comprises: first inductance L 1 ", the 7th diode D7 " and the 4th capacitor C 4 ".
The input A of said threephase switch power supply, N respectively with said DB1 " two inputs link to each other, said DB1 " two outputs respectively with said C1 " two ends link to each other; The anode of said Q1 " drain electrode and said C1 " links to each other, and source electrode links to each other with the elementary terminal 1 of said Q2 " drain electrode, said T1 " respectively, and grid links to each other with the control device of said threephase switch power supply; Negative terminal, the said Q4 of said Q2 " source electrode respectively with said C1 " " source electrode link to each other, grid links to each other with the control device of said threephase switch power supply; The anode of said Q3 " drain electrode and said C1 " links to each other, and source electrode links to each other with the elementary terminal 2 of said Q4 " drain electrode, said T1 " respectively, and grid links to each other with the control device of said threephase switch power supply; The negative terminal of said Q4 " source electrode and said C1 " links to each other, and grid links to each other with the control device of said threephase switch power supply.Said T1 " secondary terminal 3 and said D1 " anode links to each other; Said T1 " secondary terminal 4 with after terminal 5 links to each other, ground connection output; Said T1 " secondary terminal 6 and said D2 " anode links to each other; After the negative terminal of said D1 " negative terminal and said D2 " links to each other, respectively with said D3 " negative terminal, D4 " negative terminal, D5 " negative terminal D6 " negative terminal, " end links to each other L1.
The input B of said threephase switch power supply, N respectively with said DB2 " two inputs link to each other, said DB2 " two outputs respectively with said C2 " two ends link to each other; The anode of said Q5 " drain electrode and said C2 " links to each other, and source electrode links to each other with the elementary terminal 1 of said Q6 " drain electrode, said T2 " respectively, and grid links to each other with the control device of said threephase switch power supply; Negative terminal, the said Q8 of said Q6 " source electrode respectively with said C2 " " source electrode link to each other, grid links to each other with the control device of said threephase switch power supply; The anode of said Q7 " drain electrode and said C2 " links to each other, and source electrode links to each other with the elementary terminal 2 of said Q8 " drain electrode, said T2 " respectively, and grid links to each other with the control device of said threephase switch power supply; The negative terminal of said Q8 " source electrode and said C2 " links to each other, and grid links to each other with the control device of said threephase switch power supply.Said T2 " secondary terminal 3 and said D3 " anode links to each other; Said T2 " secondary terminal 4 with after terminal 5 links to each other, link to each other with the anode of said D7; Said T2 " secondary terminal 6 and said D4 " anode links to each other.
The input C of said threephase switch power supply, N respectively with said DB3 " two inputs link to each other, said DB3 " two outputs respectively with said C3 " two ends link to each other; The anode of said Q9 " drain electrode and said C3 " links to each other, and source electrode links to each other with the elementary terminal 1 of said Q10 " drain electrode, said T3 " respectively, and grid links to each other with the control device of said threephase switch power supply; Negative terminal, the said Q12 of said Q10 " source electrode respectively with said C3 " " source electrode link to each other, grid links to each other with the control device of said threephase switch power supply; The anode of said Q11 " drain electrode and said C3 " links to each other, and source electrode links to each other with the elementary terminal 2 of said Q12 " drain electrode, said T3 " respectively, and grid links to each other with the control device of said threephase switch power supply; The negative terminal of said Q12 " source electrode and said C3 " links to each other, and grid links to each other with the control device of said threephase switch power supply.Said T3 " secondary terminal 3 and said D5 " anode links to each other; Said T3 " secondary terminal 4 with after terminal 5 links to each other, " anode links to each other with said D7; Said T3 " secondary terminal 6 and said D6 " anode links to each other; Said D7 " negative terminal and said L1 " end links to each other; Said C4 " two ends respectively with said D7 " anode, said L1 " the other end link to each other.
As shown in Figure 9; A kind of HF switch converter that provides for the embodiment of the invention is the forward converter circuit; The circuit diagram of the threephase switch power supply of secondary output series connection, this power circuit comprises: the control device of full bridge rectifier, input filter circuit, HF switch converter, rectification circuit and filtering output circuit, threephase switch power supply.
Wherein, said full bridge rectifier comprises: the first full-bridge circuit DB1 ', the second full-bridge circuit DB2 ', the 3rd full-bridge circuit DB3 '.
Said input filter circuit comprises: first capacitor C 1 ', second capacitor C 2 ' and the 3rd capacitor C 3 ';
Said HF switch converter comprises: the first HF switch group, the second HF switch group and the 3rd HF switch group; The said first HF switch group comprises: the first metal-oxide-semiconductor Q1 ', the second metal-oxide-semiconductor Q2 ', the first diode D1 ', the second diode D2 '; The said second HF switch group comprises: the 3rd metal-oxide-semiconductor Q3 ', the 4th metal-oxide-semiconductor Q4 ', the 3rd diode D3 ', the 4th diode D4 '; Said the 3rd HF switch group comprises: the 5th metal-oxide-semiconductor Q5 ', the 6th metal-oxide-semiconductor Q6 ', the 5th diode D5 ', the 6th diode D6 '.
Said rectification circuit comprises: the first rectification branch road, the second rectification branch road and the 3rd rectification branch road; Wherein, the said first rectification branch road comprises: the first transformer T1, the 7th diode D7 ' and the tenth diode D10 '; The said second rectification branch road comprises: the second transformer T2, the 8th diode D8 ' and the 11 utmost point pipe D11 '; Said the 3rd rectification branch road comprises: the 3rd transformer T3, the 9th diode D9 ' and the 12 diode D12 '.
Said filtering output circuit comprises: first inductance L 1 ' the 4th capacitor C 4 '.
The input A of said threephase switch power supply, N link to each other with two inputs of said DB1 ' respectively, and two outputs of said DB1 ' link to each other with said C1 ' two ends respectively; The drain electrode of said Q1 ' links to each other with the anode of said C1 ', and source electrode links to each other with the terminal 1 of first diode D1 ' negative terminal and T1 respectively, and grid links to each other with the control device of said threephase switch power supply; Said first diode D1 ' anode links to each other with C1 ' negative terminal respectively at Q2 ' source electrode; Said D2 ' negative terminal links to each other with said Q1 ' drain electrode, and anode links to each other with T1 terminal 2 with said Q2 ' drain electrode respectively; Said Q2 ' grid links to each other with the control device of said threephase switch power supply; The terminal 3 of said T1 links to each other with the anode of D7 '; The terminal 4 of said T1 links to each other with the anode of D10 '; The negative terminal of said D7 ' links to each other with a L1 ' end with after the negative terminal of D10 ' links to each other;
The input B of said threephase switch power supply, N link to each other with two inputs of said DB2 ' respectively, and two outputs of said DB2 ' link to each other with said C2 ' two ends respectively; The drain electrode of said Q3 ' links to each other with the anode of said C2 ', and source electrode links to each other with the terminal 1 of the 3rd diode D3 ' negative terminal and T2 respectively, and grid links to each other with the control device of said threephase switch power supply; Said the 3rd diode D3 ' anode links to each other with C2 ' negative terminal respectively at Q4 ' source electrode; Said D4 ' negative terminal links to each other with said Q3 ' drain electrode, and anode links to each other with T2 terminal 2 with said Q4 ' drain electrode respectively; Said Q4 ' grid links to each other with the control device of said threephase switch power supply; The terminal 3 of said T2 links to each other with the anode of D8 '; The terminal 4 of said T2 links to each other with the anode of D11 '; The negative terminal of said D8 ' links to each other with D10 ' anode with after the negative terminal of D11 ' links to each other;
The input C of said threephase switch power supply, N link to each other with two inputs of said DB3 ' respectively, and two outputs of said DB3 ' link to each other with said C3 ' two ends respectively; The drain electrode of said Q5 ' links to each other with the anode of said C3 ', and source electrode links to each other with the terminal 1 of the 5th diode D5 ' negative terminal and T3 respectively, and grid links to each other with the control device of said threephase switch power supply; Said the 5th diode D5 ' anode links to each other with C3 ' negative terminal respectively at Q6 ' source electrode; Said D6 ' negative terminal links to each other with said Q5 ' drain electrode, and anode links to each other with T3 terminal 2 with said Q6 ' drain electrode respectively; Said Q6 ' grid links to each other with the control device of said threephase switch power supply; The terminal 3 of said T3 links to each other with the anode of D9 '; The terminal 4 of said T3 links to each other with the anode of D12 '; The negative terminal of said D9 ' links to each other with D11 ' anode with after the negative terminal of D12 ' links to each other; The anode of said D12 ' links to each other with a said C4 ' end; Said C4 ' other end links to each other with a L1 ' end.
Shown in figure 10; A kind of HF switch converter that provides for the embodiment of the invention is the forward converter circuit; The circuit diagram of the threephase switch power supply of secondary output-parallel, the circuit of this power supply comprises: the control device of full bridge rectifier, input filter circuit, HF switch converter, rectification circuit and filtering output circuit, threephase switch power supply.
Wherein, said full bridge rectifier comprises: the first full-bridge circuit DB1, the second full-bridge circuit DB2, the 3rd full-bridge circuit DB3.
Said input filter circuit comprises: first capacitor C 1, second capacitor C 2 and the 3rd capacitor C 3;
Said HF switch converter comprises: the first HF switch group, the second HF switch group and the 3rd HF switch group; The said first HF switch group comprises: the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the first diode D1, the second diode D2; The said second HF switch group comprises: the 3rd metal-oxide-semiconductor Q3, the 4th metal-oxide-semiconductor Q4, the 3rd diode D3, the 4th diode D4; Said the 3rd HF switch group comprises: the 5th metal-oxide-semiconductor Q5, the 6th metal-oxide-semiconductor Q6, the 5th diode D5, the 6th diode D6.
Said rectification circuit comprises: the first rectification branch road, the second rectification branch road and the 3rd rectification branch road; Wherein, the said first rectification branch road comprises: the first transformer T1, the 7th diode D7; The said second rectification branch road comprises: the second transformer T2, the 8th diode D8; Said the 3rd rectification branch road comprises: the 3rd transformer T3, the 9th diode D9.
Said filtering output circuit comprises: the tenth diode D10, first inductance L 1 ' and the 4th capacitor C 4 '.
The input A of said threephase switch power supply, N link to each other with two inputs of said DB1 respectively, and two outputs of said DB1 link to each other with said C1 two ends respectively; The drain electrode of said Q1 links to each other with the anode of said C1, and source electrode links to each other with the terminal 1 of the first diode D1 negative terminal and T1 respectively, and grid links to each other with the control device of said threephase switch power supply; The said first diode D1 anode links to each other with the C1 negative terminal respectively at the Q2 source electrode; Said D2 negative terminal links to each other with said Q1 drain electrode, and anode links to each other with T1 terminal 2 with said Q2 drain electrode respectively; Said Q2 grid links to each other with the control device of said threephase switch power supply; The terminal 3 of said T1 links to each other with the anode of D7; The terminal 4 of said T1 links to each other with the anode of D10; The negative terminal of said D10 links to each other with L1 one end, and the anode of D10 links to each other with the end of C4; The other end of said C4 links to each other with the other end of said L1.
The input B of said threephase switch power supply, N link to each other with two inputs of said DB2 respectively, and two outputs of said DB2 link to each other with said C2 two ends respectively; The drain electrode of said Q3 links to each other with the anode of said C2, and source electrode links to each other with the terminal 1 of the 3rd diode D3 negative terminal and T2 respectively, and grid links to each other with the control device of said threephase switch power supply; Said the 3rd diode D3 anode links to each other with the C2 negative terminal respectively at the Q4 source electrode; Said D4 negative terminal links to each other with said Q3 drain electrode, and anode links to each other with T2 terminal 2 with said Q4 drain electrode respectively; Said Q4 grid links to each other with the control device of said threephase switch power supply; The terminal 3 of said T2 links to each other with the anode of D8; The terminal 4 of said T2 links to each other with the anode of D10; The negative terminal of said D8 links to each other with L1 one end with after the negative terminal of D10 links to each other;
The input C of said threephase switch power supply, N link to each other with two inputs of said DB3 respectively, and two outputs of said DB3 link to each other with said C3 two ends respectively; The drain electrode of said Q5 links to each other with the anode of said C3, and source electrode links to each other with the terminal 1 of the 5th diode D5 negative terminal and T3 respectively, and grid links to each other with the control device of said threephase switch power supply; Said the 5th diode D5 anode links to each other with the C3 negative terminal respectively at the Q6 source electrode; Said D6 negative terminal links to each other with said Q5 drain electrode, and anode links to each other with T3 terminal 2 with said Q6 drain electrode respectively; Said Q6 grid links to each other with the control device of said threephase switch power supply; The terminal 3 of said T3 links to each other with the anode of D9; The terminal 4 of said T3 links to each other with the anode of D10; The negative terminal of said D9 links to each other with L1 one end with after the negative terminal of D10 links to each other.
The control method of a kind of threephase switch power supply that the embodiment of the invention provides, device and a kind of threephase switch power supply are the synchronous working mode through the HF switch converter is set, and make that three branch roads can carry out the maximum pulse width modulation synchronously in the threephase switch power supply; Through obtaining input parameter, output parameter and input absolute value high-frequency pulse current signal; According to said input parameter, output parameter, judge whether said HF switch converter need carry out the maximum pulse width modulation; If desired; Pwm unit carries out the maximum pulse width modulation according to input parameter control HF switch converter; The realization power supply is followed the tracks of promptly said input absolute value current signal output voltage is adjusted, and the current pulse signal after the pulse-width modulation is exported through rectification.Like this; The threephase switch power supply that the embodiment of the invention provides combines its control method not only can accomplish power factor correction through the HF switch converter; And adjustment output direct current signal; Thereby reduced the realization difficulty of threephase switch power supply, simplified the control procedure complexity of said threephase switch power supply.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; Described program can be stored in the computer read/write memory medium; This program is when carrying out; Comprise the steps: (step of method), described storage medium, as: ROM/RAM, magnetic disc, CD etc.
The above; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; Can expect easily changing or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of said claim.
Claims (12)
1. the control method of a threephase switch power supply is characterized in that,
It is the synchronous working mode that the HF switch converter is set;
Obtain input parameter, output parameter and input absolute value sinusoidal current reference signal;
According to said input and output parameter, judge whether said HF switch converter need carry out the maximum pulse width modulation;
If desired, then carry out real-time pulse-width modulation, and the high frequency alternating impulse signal after the pulse-width modulation is exported through transformation, rectification according to input parameter.
2. the control method of threephase switch power supply according to claim 1 is characterized in that, said input parameter comprises: the input voltage signal parameter; Said output parameter comprises: output voltage signal parameter, output current signal parameter, output loading parameter; Said input absolute value current reference signal is that absolute value is sinusoidal wave.
3. the control method of threephase switch power supply according to claim 2 is characterized in that, said HF switch converter is three groups of full bridge switching circuits, perhaps is three groups of forward converter circuit.
4. according to the control method of any described threephase switch power supply in the claim 1 to 3, it is characterized in that said threephase switch power supply is three facies tract center line AC input modes, does not perhaps have the center line AC input modes for three-phase.
5. the control method of threephase switch power supply according to claim 4 is characterized in that, when series connection output was adopted in the transformer secondary output output of said threephase switch power supply, this method also comprised:
It is the phase shift type of drive that said HF switch converter is set.
6. the control device of a threephase switch power supply is characterized in that,
Parameter acquiring unit is used for when the HF switch converter being set being the synchronous working mode, obtains input parameter, output parameter and input absolute value current reference signal;
Judging unit is used for according to said input and output parameter, judges whether said HF switch converter need carry out the maximum pulse width modulation;
Pwm unit is used for according to input parameter said input absolute value current reference signal being carried out pulse-width modulation, and the high frequency alternating impulse signal after the pulse-width modulation is exported through transformation, rectification.
7. the control device of threephase switch power supply according to claim 6 is characterized in that, said input parameter comprises: the input voltage signal parameter; Said output parameter comprises: output voltage signal parameter, output current signal parameter, output loading parameter; Said input absolute value current reference signal is that absolute value is sinusoidal wave.
8. the control device of threephase switch power supply according to claim 7 is characterized in that,
When series connection output was adopted in the transformer secondary output output of said threephase switch power supply, it was the phase shift type of drive that said HF switch converter also is set.
9. a threephase switch power supply is characterized in that, comprising: full bridge rectifier, input filter circuit, HF switch converter, rectification circuit and filtering output circuit;
Said full bridge rectifier is used for the sinusoidal wave direct current of absolute value of the sine wave AC electric rectification single direction of input and the absolute value current reference signal is provided;
Said input filter circuit is used for said input absolute value current reference signal is carried out Filtering Processing and the high-frequency pulse current that the HF switch converter produces is carried out filtering so that satisfy electromagnetic compatibility requirements;
Said HF switch converter is used for the HF switch converter is carried out pulse-width modulation, and the realization power supply is followed the tracks of promptly said input absolute value current reference signal output voltage is adjusted;
Said rectification circuit is used for high frequency alternating impulse signal after the said pulse-width modulation is carried out rectification;
Said filtering output circuit is used for the signal after the said rectification processing is carried out filtering output.
10. according to the said threephase switch power supply of claim 9, it is characterized in that this power supply also comprises: like the control device of any described threephase switch power supply in the claim 6 to 8.
11., it is characterized in that said HF switch converter is three groups of full-bridge switch translation circuits according to the said threephase switch power supply of claim 10, perhaps be three groups of forward converter circuit.
12., it is characterized in that said HF switch converter and said rectifying output circuit adopt and be connected in parallel according to the said threephase switch power supply of claim 11, perhaps adopt to be connected in series.
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Application publication date: 20120530 |