CN103683944A - Voltage supply system, converter therein, and voltage adjustment method - Google Patents
Voltage supply system, converter therein, and voltage adjustment method Download PDFInfo
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- CN103683944A CN103683944A CN201210357145.8A CN201210357145A CN103683944A CN 103683944 A CN103683944 A CN 103683944A CN 201210357145 A CN201210357145 A CN 201210357145A CN 103683944 A CN103683944 A CN 103683944A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention discloses a voltage supply system, a current transformer in the voltage supply system and a voltage adjusting method. The converter comprises a power module, a feedback module and a control module. The control module compares the duty ratio reference value and the duty ratio value, correspondingly generates variable reference voltage according to the comparison result, compares the variable reference voltage with the feedback voltage, and adjusts the duty ratio value according to the comparison result of the variable reference voltage and the feedback voltage.
Description
Technical field
The invention relates to a kind of voltage supply system, and particularly relevant for the current transformer in a kind of voltage supply system.
Background technology
Embedded power supply adopts the particular process sequence such as multi-layer thick copper printed circuit board (PCB) (PCB) and Surface Mount power device conventionally, reduce whereby volume, improve reliability, and it is all widely used in fields such as wireless network, optical network unit, server and data storings.
Generally speaking, when traditional full adjustment type current transformer (Converter) is applied in embedded-type electric source domain, its efficiency is conventionally restricted and cannot effectively promote.For instance, in full adjustment type current transformer, the output voltage of power module be through feedback and with fixed reference potential comparison, and control module drives signal according to comparative result adjustment, and adjusts whereby the output voltage of power module.Therefore, the size of output voltage is mainly determined by the comparative result of fixed reference potential and feedback voltage.Secondly, for making power module all can produce corresponding output voltage according to input voltage, in power module, the umber of turn of transformer ratio must arrange quite littlely, to guarantee that power module still can produce and the corresponding output voltage of fixed reference potential under minimum input voltage, allow power module still be operated in the state of full adjustment type (Full-Regulated), otherwise in transformer, excessive umber of turn ratio can cause power module cannot produce and the corresponding output voltage of fixed reference potential, makes power module lose the feedback regulation function according to output voltage.
Yet, selection due to aforementioned limited umber of turn ratio, therefore when power module operates under high input voltage, outputting inductance wherein bears very high weber value (V * t) conventionally, cause outputting inductance must there is magnetic core or the more umber of turn of large-size, therefore directly limited the power density of power module, and the efficiency of power module cannot be promoted.
Summary of the invention
Content of the present invention is a kind of voltage supply system, current transformer and voltage adjusting method are wherein provided, so as to when input voltage increases, adjust gradually by input voltage change and output voltage, the weber value of being born to reduce outputting inductance.
One execution mode of content of the present invention is about a kind of current transformer, and it comprises power model, feedback module and control module.Power model is in order to be converted to an output voltage by an input voltage.Feedback module and power model are electrically connected, in order to produce a feedback voltage corresponding with output voltage.Control module and power model and feedback module are electrically connected, control module is in order to compare a duty cycle reference value and a duty ratio numerical value, according to both results relatively, correspondingly produce a variable reference voltage, and in order to compare variable reference voltage and feedback voltage, and adjust duty ratio numerical value according to its result relatively.
In an embodiment of the present invention, when input voltage changes, control module is adjusted variable reference voltage and is correspondingly adjusted duty ratio numerical value, and produces drive control signal corresponding to the duty ratio numerical value through adjusting with power ratio control module.
In yet another embodiment of the invention, control module also comprises the first comparison circuit and the first computing circuit.The first comparison circuit is in order to compare duty cycle reference value and duty ratio numerical value, to produce duty cycle difference.The first computing circuit and the first comparison circuit are electrically connected, in order to duty cycle difference is carried out to computing to produce and to adjust variable reference voltage.
In another embodiment of the present invention, control module also comprises the second comparison circuit, the second computing circuit and drive signal generation circuit.The second comparison circuit and the first computing circuit and feedback module are electrically connected, in order to compare variable reference voltage and feedback voltage, to produce error voltage.The second computing circuit and the second comparison circuit are electrically connected, in order to error voltage is carried out to computing to produce and to adjust duty ratio numerical value.Drive signal generation circuit and the second computing circuit and power model are electrically connected, the duty ratio numerical value producing in order to receive the second computing circuit, and produce the drive control signal corresponding to duty ratio numerical value.
In the present invention time embodiment, the first comparison circuit is to be electrically connected the second computing circuit, and the duty ratio numerical value producing in order to receive the second computing circuit.
In further embodiment of this invention, the first comparison circuit is to be electrically connected drive signal generation circuit, and in order to capture duty ratio numerical value in self-driven signal generating circuit.
In yet another embodiment of the invention, the drive control signal of power ratio control module is to feed back to control module after being exported by control module, and the first comparison circuit is in order to receive the drive control signal of feedback, to capture corresponding duty ratio numerical value in self-driven control signal.
In another embodiment of the present invention, when input voltage raises, variable reference voltage increases gradually, and control module adjustment duty ratio numerical value increases gradually.
Another execution mode of content of the present invention is about a kind of voltage supply system, and it comprises high voltage bus, low-voltage bus bar, current transformer and a plurality of supply voltage generation circuit.Current transformer is electrically connected between high voltage bus and low-voltage bus bar, wherein current transformer at least comprises control module, control module is in order to compare a duty cycle reference value and a duty ratio numerical value, and produce and adjust a variable reference voltage according to duty cycle reference value and duty ratio numeric ratio result, according to the result of variable reference voltage and a feedback voltage comparison, adjust duty ratio numerical value again, and produce the drive control signal corresponding to the duty ratio numerical value through adjusting, to adjust the output voltage of current transformer.A plurality of supply voltage generation circuits are connected in parallel to each other, and are electrically connected at low-voltage bus bar, and in order to the output voltage of current transformer is converted to supply voltage, give load separately.
In an embodiment of the present invention, the control module of current transformer also comprises the first comparison circuit and the first computing circuit.The first comparison circuit is in order to compare duty cycle reference value and duty ratio numerical value, to produce duty cycle difference.The first computing circuit and this first comparison circuit are electrically connected, in order to duty cycle difference is carried out to computing to produce and to adjust variable reference voltage.
In another embodiment of the present invention, the control module of current transformer also comprises the second comparison circuit, the second computing circuit and drive signal generation circuit.The second comparison circuit and the first computing circuit are electrically connected, in order to compare variable reference voltage and feedback voltage, to produce error voltage.The second computing circuit and the second comparison circuit are electrically connected, in order to error voltage is carried out to computing to produce and to adjust duty ratio numerical value.Drive signal generation circuit and the second computing circuit are electrically connected, the duty ratio numerical value producing in order to receive the second computing circuit, and produce the drive control signal corresponding to duty ratio numerical value.
In the present invention time embodiment, the first comparison circuit is to be electrically connected the second computing circuit, and the duty ratio numerical value producing in order to receive the second computing circuit.
In further embodiment of this invention, the first comparison circuit is to be electrically connected drive signal generation circuit, and in order to capture duty ratio numerical value in self-driven signal generating circuit.
In yet another embodiment of the invention, drive control signal is to feed back to control module after being exported by control module, and the first comparison circuit is in order to receive the drive control signal of feedback, to capture corresponding duty ratio numerical value in self-driven control signal.
In another embodiment of the present invention, when an input voltage of current transformer changes, control module is adjusted variable reference voltage, and when input voltage raises, variable reference voltage increases gradually, control module is adjusted duty ratio numerical value to be increased gradually, and increases gradually according to the output voltage of drive control signal adjustment.
The another execution mode of content of the present invention is that it comprises about a kind of voltage adjusting method: compare a duty ratio numerical value and a duty cycle reference value; According to duty cycle reference value and duty ratio numeric ratio result, correspondingly produce a variable reference voltage; Compare variable reference voltage and a feedback voltage; And adjust duty ratio numerical value according to the result of variable reference voltage and feedback voltage comparison, make power model, according to the drive control signal corresponding to duty ratio numerical value, input voltage is converted to the output voltage through adjusting.
In another embodiment of the present invention, duty ratio numerical value is produced and is adjusted by a computing circuit.
In the present invention time embodiment, drive control signal is produced by a drive signal generation circuit, and with the duty ratio numerical value of duty cycle reference value comparison be to capture self-driven signal generating circuit.
In further embodiment of this invention, with the duty ratio numerical value of duty cycle reference value comparison be the self-driven control signal of acquisition.
In yet another embodiment of the invention, aforesaid voltage method of adjustment also comprises when input voltage changes, and adjusts variable reference voltage, and wherein, when input voltage raises, variable reference voltage increases gradually, and duty ratio numerical value increases gradually through adjustment.
According to technology contents of the present invention, application of aforementioned embodiments of the invention, can not increase under the volume of outputting inductance, promote the operating efficiency of current transformer, increase smoothly power density.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of voltage supply system of illustrating according to one embodiment of the invention;
Fig. 2 is the circuit diagram of a kind of current transformer of illustrating according to one embodiment of the invention;
Fig. 3 illustrates signal that input voltage, variable reference voltage, duty ratio numerical value are corresponding and the respective change schematic diagram of output voltage according to the embodiment of the present invention;
Fig. 4 is the circuit diagram of a kind of current transformer of illustrating according to another embodiment of the present invention;
Fig. 5 is the circuit diagram of a kind of current transformer of illustrating according to further embodiment of this invention;
Fig. 6 is the flow chart of a kind of voltage adjusting method of illustrating according to one embodiment of the invention.
[main element symbol description]
100: voltage supply system
110: high voltage bus
120: current transformer
130: low-voltage bus bar
140: supply voltage generation circuit
150: load
200: current transformer
220: power model
240: feedback module
260a, 260b, 260c: control module
262: the first comparison circuits
264: the first computing circuits
266: the second comparison circuits
268: the second computing circuits
270: driving signal generator
602,604,606,608,610: step
Embodiment
Below to coordinate appended accompanying drawing to elaborate for embodiment, but the scope that the embodiment providing is not contained in order to limit the present invention, and the description of structure running is non-in order to limit the order of its execution, any structure being reconfigured by element, the device with impartial effect that produces, is all the scope that the present invention is contained.In addition, accompanying drawing only for the purpose of description, is not mapped according to life size.
About " coupling " used herein or " connection ", all can refer to two or a plurality of element mutually directly make entity or in electrical contact, or mutually indirectly put into effect body or in electrical contact, also can refer to two or a plurality of element mutual operation or action.
Fig. 1 is the circuit diagram of a kind of voltage supply system of illustrating according to one embodiment of the invention.Voltage supply system 100 comprises high voltage bus (High Voltage Bus) 110, current transformer 120, low-voltage bus bar (Low Voltage Bus) 130 and a plurality of supply voltage generation circuit 140.Current transformer 120 is electrically connected between high voltage bus 110 and low-voltage bus bar 130, in order to see through high voltage bus 110, receives an input voltage vin, and input voltage vin is converted to an output voltage V out via low-voltage bus bar 130 transmission.Aforementioned supply voltage generation circuit 140 is connected in parallel to each other and is electrically connected at low-voltage bus bar 130, offers corresponding load 150 separately in order to the output voltage V out of current transformer 200 is converted to a supply voltage.
Fig. 2 is the circuit diagram of a kind of current transformer of illustrating according to the embodiment of the present invention.Current transformer 200 shown in Fig. 2 can be applicable in the voltage supply system 100 shown in Fig. 1, but not as limit.As shown in Figure 2, current transformer 200 at least comprises power model 220, feedback module 240 and control module 260a.Power model 220 is in order to be converted to input voltage vin output voltage V out.Feedback module 240 is electrically connected with power model 220, and in order to produce the feedback voltage V f corresponding with output voltage V out.Control module 260a and feedback module 240, power model 220 are electrically connected, and in order to compare a duty ratio (duty ratio) reference value Dref and a duty ratio numerical value Dc, result according to duty cycle reference value Dref and duty ratio numerical value Dc comparison correspondingly produces a variable reference voltage Vref, and in order to compare variable reference voltage Vref and feedback voltage V f, and adjust duty ratio numerical value Dc according to the result of variable reference voltage Vref and feedback voltage V f comparison.In implementation, duty cycle reference value Dref can be fixed as certain numerical value or ratio (as: 50%) according to actual demand.
Should be noted, duty cycle reference value Dref herein and duty ratio numerical value Dc, can refer to actual numerical value, also can make a general reference the corresponding signal of numerical value.In other words, control module 260a can be in order to receive duty cycle reference value Dref and both corresponding signals of duty ratio numerical value Dc, and both corresponding signals are compared to processing.
In one embodiment, when input voltage vin changes, control module 260a adjusts variable reference voltage Vref and correspondingly adjusts duty ratio numerical value Dc, and control module 260a produces the drive control signal Sc corresponding to the duty ratio numerical value Dc through adjusting, the operation of changing so as to 220 pairs of input voltage vin of power ratio control module, and then the output voltage V out of adjustment current transformer 200.
In implementation, above-mentioned control module 260a or following control module are (as the control module 260b in Fig. 4, or the control module 260c in Fig. 5), all can see through separately numerical digit controller (or control chip) or analogy controller (or control chip) realizes.
In structure, power model 220 can comprise the first switch element S1, second switch element S2, the first dividing potential drop capacitor C 1, the second dividing potential drop capacitor C 2, the first rectifier switch SR1, the second rectifier switch SR2, filter inductance L1 and filter capacitor Co.The first switch element S1, second switch element S2 are electrically in parallel with the first dividing potential drop capacitor C 1, the second dividing potential drop capacitor C 2 respectively, and the drive control signal Sc that controlled module 260a exports controls, carry out separately conducting (or unlatching) or cut-off (or closing).The first dividing potential drop capacitor C 1 is connected with the second dividing potential drop capacitor C 2, and input voltage vin is carried out to dividing potential drop, so that the armature winding of relevant voltage to transformer Tr to be provided.The secondary winding of the first rectifier switch SR1 and the second rectifier switch SR2 connection transformer Tr, in order to carry out synchronous rectification.Filter inductance L1, filter capacitor Co connect with the first rectifier switch SR1, in order to carry out filtering.
Secondly, feedback module 240 can at least comprise the first impedance Z 1 and the second impedance Z 2, and it produces the feedback voltage V f corresponding with output voltage V out whereby in order to output voltage V out is carried out to dividing potential drop.
In another embodiment, feedback module 240 also can be shunted in order to the output current to corresponding output voltage V out, produces whereby the feedback current signal corresponding with output current.And control module 260a just can compare feedback current signal and a variable reference current signals (at this, variable reference current signals can be by corresponding generation after relatively duty cycle reference value and duty ratio numerical value) after, according to the result adjustment duty ratio numerical value of feedback current signal and variable reference current signals comparison.In other words, the feedback signal that aforementioned feedback module 240 produces can be feedback voltage signal, can be also feedback current signal, and the function of control module 260a is with operation can corresponding to feedback voltage signal or feedback current signal appropriately adjusts.
In addition, control module 260a at least comprises the first comparison circuit 262, the first computing circuit 264, the second comparison circuit 266, the second computing circuit 268 and driving signal generator 270.The first comparison circuit 262 is in order to compare duty cycle reference value Dref and duty ratio numerical value Dc, to produce duty cycle difference Derr.The first computing circuit 264 and the first comparison circuit 262 are electrically connected, in order to duty cycle difference Derr is carried out to computing, to produce and to adjust variable reference voltage Vref.The second comparison circuit 266 and the first computing circuit 264 and feedback module 240 are electrically connected, in order to the feedback voltage V f that relatively variable reference voltage Vref and feedback module 240 produce, to produce error voltage Verr.The second computing circuit 268 and the second comparison circuit 266 are electrically connected, in order to error voltage Verr is carried out to computing to produce and to adjust duty ratio numerical value Dc.Driving signal generator 270 and the second computing circuit 268 and power model 220 are electrically connected, the duty ratio numerical value Dc producing in order to receive the second computing circuit 268, and produce the drive control signal Sc corresponding to duty ratio numerical value Dc.
In the present embodiment, the first comparison circuit 262 is electrically connected the second computing circuit 268, the duty ratio numerical value Dc producing in order to receive the second computing circuit 268, and duty ratio numerical value Dc is produced and is adjusted by the second computing circuit 268, and the duty ratio numerical value Dc after adjusting further feeds back to the first comparison circuit 262, for comparing with duty cycle reference value Dref.
Fig. 3 illustrates signal that input voltage, variable reference voltage, duty ratio numerical value are corresponding and the respective change schematic diagram of output voltage according to the embodiment of the present invention.Simultaneously with reference to Fig. 2 and Fig. 3.When input voltage vin raises or when transition is higher levels in time t1, because variable reference voltage Vref cannot correspondingly change moment immediately, for example, therefore control module 260a can reduce (: adjust duty ratio numerical value Dc to being less than duty cycle reference value Dref) by first corresponding adjustment duty ratio numerical value Dc, output voltage V out is not changed immediately, but while increasing gradually in duty ratio numerical value Dc is follow-up, output voltage V out and corresponding feedback voltage V f thereof are again along with variable reference voltage Vref changes.
Then, during time t1 to t2, because duty ratio numerical value Dc is less than duty cycle reference value Dref, therefore at the duty ratio numerical value Dc being fed through relatively, after calculation process, the first computing circuit 264 can be adjusted variable reference voltage Vref according to comparison and operation result and gradually rise, until variable reference voltage Vref is equal to feedback voltage V f (in time t2), and simultaneously at the variable reference voltage Vref increasing gradually through relatively, after calculation process, the second computing circuit 268 also can be adjusted duty ratio numerical value Dc according to comparison and operation result, duty ratio numerical value Dc is increased gradually, until duty ratio numerical value Dc is equal to duty cycle reference value Dref (in time t2).
In addition, driving signal generator 270 can be according to the interior duty ratio numerical value Dc changing during time t1 to t2, produce corresponding drive control signal Sc, make power model 220 adjust the output voltage V out after conversion according to drive control signal Sc, and the output voltage V out after adjusting also rises to a stationary value in time t2, and then allows current transformer 200 enter new stable state.
Compared to known technology, in previous embodiment by adjusting duty ratio numerical value Dc, and and then change the mode of operation of reference voltage Vref, can be when input voltage vin changes, the output voltage V out of current transformer 200 is not changed immediately, but along with reference voltage Vref changes.Thus, current transformer 200 still can adjust output voltage V out gradually when input voltage vin changes, reduce whereby the weber value (V * t) that outputting inductance bears, outputting inductance is not limited to must have magnetic core or the more umber of turn of large-size, and therefore the power density of power model 220 can increase, the efficiency of current transformer can and then promote.
Fig. 4 is the circuit diagram of the current transformer that illustrates according to another embodiment of the present invention.Compared to Fig. 2, in the present embodiment, the first comparison circuit 262 in control module 260b is electrically connected drive signal generation circuit 270, and in order to capture duty ratio numerical value Dc in self-driven signal generating circuit 270, relatively capture duty ratio numerical value Dc and duty cycle reference value Dref in self-driven signal generating circuit 270.
Fig. 5 is the circuit diagram of the current transformer that illustrates according to further embodiment of this invention.Compared to Fig. 2, in the present embodiment, the first comparison circuit 262 in control module 260c feeds back to the drive control signal Sc of control module 260c after being exported by control module 260c in order to reception, and relatively captures duty ratio numerical value Dc and duty cycle reference value Dref in self-driven control signal Sc.
Fig. 6 is the flow chart of a kind of voltage adjusting method of illustrating according to one embodiment of the invention.For the purpose of clear and convenient explanation, the explanation of following embodiment is referring to Fig. 2 and Fig. 6.First, relatively a duty ratio numerical value Dc and duty cycle reference value Dref (step 602), follow the comparative result corresponding generation variable reference voltage Vref (step 604) according to duty ratio numerical value Dc and duty cycle reference value Dref.Then, compare variable reference voltage Vref and feedback voltage V f (step 606), and adjust duty ratio numerical value Dc until duty ratio numerical value Dc is equal to duty cycle reference value Dref (step 608) according to the comparative result of variable reference voltage Vref and feedback voltage V f.Then, power model 220 is converted to the regulated output voltage Vout (step 610) after adjusting according to the drive control signal Sc corresponding to this duty ratio numerical value Dc by input voltage vin.
In one embodiment, the duty ratio numerical value Dc in above-mentioned voltage adjusting method can be the second computing circuit 268 and produces and adjust.
In one embodiment, aforesaid voltage method of adjustment more can comprise when input voltage vin changes, and adjusts variable reference voltage Vref.When input voltage vin raises, variable reference voltage Vref increases gradually, and duty ratio numerical value Dc also increases gradually through adjustment.
In another embodiment, the self-driven signal generating circuit 270 of duty ratio numerical value Dc fechtable in this voltage adjusting method, when input voltage vin raises, variable reference voltage Vref increases gradually, and duty ratio numerical value Dc also increases gradually through adjustment.
In another embodiment, duty ratio numerical value Dc in this voltage adjusting method captures self-driven control signal Sc, drive control signal Sc feeds back to control module 260c and is received by the first comparison circuit 262 after being exported by the control module 260c as Fig. 5, when input voltage vin raises, variable reference voltage Vref increases gradually, and duty ratio numerical value Dc also increases gradually through adjustment.
Mentioned step, except chatting especially bright its order person, all can adjust its sequencing according to actual conditions in the present embodiment, and the flow chart shown in Fig. 6 is only an embodiment, not in order to limit the present invention.
Embodiment from the invention described above, the embodiment of application the invention described above, can when changing, input voltage to output voltage, adjust gradually, reduce whereby the weber value (V * t) that outputting inductance bears, outputting inductance is not limited to must have magnetic core or the more umber of turn of large-size, needn't in order to avoid, the magnetic core of outputting inductance is saturated increase its volume, and therefore the power density of power model 220 also can increase, the efficiency of current transformer can and then promote.。
Although the present invention discloses as above with execution mode; so it is not in order to limit the present invention; anyly be familiar with this skill person; without departing from the spirit and scope of the present invention; when being used for a variety of modifications and variations, so the scope that protection scope of the present invention ought define depending on appending claims is as the criterion.
Claims (20)
1. a current transformer, is characterized in that, this current transformer at least comprises:
One power model, in order to be converted to an output voltage by an input voltage;
One feedback module, is electrically connected with this power model, in order to produce a feedback voltage corresponding with this output voltage; And
One control module, be electrically connected with this power model and this feedback module, wherein this control module is in order to compare a duty cycle reference value and a duty ratio numerical value, according to this duty cycle reference value and this duty ratio numeric ratio result, correspondingly produce a variable reference voltage, and in order to relatively this variable reference voltage and this feedback voltage, and adjust this duty ratio numerical value according to the result of this variable reference voltage and this feedback voltage comparison.
2. current transformer according to claim 1, it is characterized in that, when this input voltage changes, this control module is adjusted this variable reference voltage and is correspondingly adjusted this duty ratio numerical value, and this control module produces a drive control signal corresponding to this duty ratio numerical value through adjusting to control this power model.
3. current transformer according to claim 1, is characterized in that, this control module also comprises:
One first comparison circuit, in order to relatively this duty cycle reference value and this duty ratio numerical value, to produce a duty cycle difference; And
One first computing circuit, is electrically connected with this first comparison circuit, in order to this duty cycle difference is carried out to computing to produce and to adjust this variable reference voltage.
4. current transformer according to claim 3, is characterized in that, this control module also comprises:
One second comparison circuit, is electrically connected with this first computing circuit and this feedback module, in order to relatively this variable reference voltage and this feedback voltage, to produce an error voltage;
One second computing circuit, is electrically connected with this second comparison circuit, in order to this error voltage is carried out to computing to produce and to adjust this duty ratio numerical value; And
One drive signal generation circuit, is electrically connected with this second computing circuit and this power model, this duty ratio numerical value producing in order to receive this second computing circuit, and produce this drive control signal corresponding to this duty ratio numerical value.
5. current transformer according to claim 4, is characterized in that, this first comparison circuit is to be electrically connected this second computing circuit, and this duty ratio numerical value producing in order to receive this second computing circuit.
6. current transformer according to claim 4, is characterized in that, this first comparison circuit is to be electrically connected this drive signal generation circuit, and in order to certainly to capture this duty ratio numerical value in this drive signal generation circuit.
7. current transformer according to claim 4, it is characterized in that, this drive control signal of controlling this power model is by feeding back to this control module after this control module output, and this first comparison circuit is in order to receive this drive control signal of feedback, certainly to capture corresponding this duty ratio numerical value in this drive control signal.
8. current transformer according to claim 1, is characterized in that, when this input voltage raises, this variable reference voltage increases gradually, and this control module is adjusted this duty ratio numerical value and increased gradually.
9. a voltage supply system, is characterized in that, this voltage supply system at least comprises:
One high voltage bus;
One low-voltage bus bar;
One current transformer, be electrically connected between this high voltage bus and this low-voltage bus bar, wherein this current transformer at least comprises a control module, this control module is in order to compare a duty cycle reference value and a duty ratio numerical value, and produce and adjust a variable reference voltage according to this duty cycle reference value and this duty ratio numeric ratio result, according to the result of this variable reference voltage and a feedback voltage comparison, adjust this duty ratio numerical value again, and produce the drive control signal corresponding to this duty ratio numerical value through adjusting, to adjust an output voltage of this current transformer; And
A plurality of supply voltage generation circuits, are connected in parallel to each other and are electrically connected at this low-voltage bus bar, and in order to this output voltage of this current transformer is converted to a supply voltage, give a load separately.
10. voltage supply system according to claim 9, is characterized in that, this control module of this current transformer also comprises:
One first comparison circuit, in order to relatively this duty cycle reference value and this duty ratio numerical value, to produce a duty cycle difference; And
One first computing circuit, is electrically connected with this first comparison circuit, in order to this duty cycle difference is carried out to computing to produce and to adjust this variable reference voltage.
11. voltage supply systems according to claim 10, is characterized in that, this control module of this current transformer also comprises:
One second comparison circuit, is electrically connected with this first computing circuit, in order to relatively this variable reference voltage and this feedback voltage, to produce an error voltage;
One second computing circuit, is electrically connected with this second comparison circuit, in order to this error voltage is carried out to computing to produce and to adjust this duty ratio numerical value; And
One drive signal generation circuit, is electrically connected with this second computing circuit, this duty ratio numerical value producing in order to receive this second computing circuit, and produce this drive control signal corresponding to this duty ratio numerical value.
12. voltage supply systems according to claim 11, is characterized in that, this first comparison circuit is to be electrically connected this second computing circuit, and this duty ratio numerical value producing in order to receive this second computing circuit.
13. voltage supply systems according to claim 11, is characterized in that, this first comparison circuit is to be electrically connected this drive signal generation circuit, and in order to certainly to capture this duty ratio numerical value in this drive signal generation circuit.
14. voltage supply systems according to claim 11, it is characterized in that, this drive control signal is by feeding back to this control module after this control module output, and this first comparison circuit is in order to receive this drive control signal of feedback, certainly to capture corresponding this duty ratio numerical value in this drive control signal.
15. voltage supply systems according to claim 11, it is characterized in that, when an input voltage of this current transformer changes, this control module is adjusted this variable reference voltage, and when this input voltage raises, this variable reference voltage increases gradually, and this control module is adjusted this duty ratio numerical value to be increased gradually, and increases gradually according to this output voltage of this drive control signal adjustment.
16. 1 kinds of voltage adjusting methods, is characterized in that, this voltage adjusting method comprises:
Compare a duty ratio numerical value and a duty cycle reference value;
According to this duty cycle reference value and this duty ratio numeric ratio result, correspondingly produce a variable reference voltage;
Relatively this variable reference voltage and a feedback voltage; And
According to the result of this variable reference voltage and this feedback voltage comparison, adjust this duty ratio numerical value, make a power model, according to the drive control signal corresponding to this duty ratio numerical value, this input voltage is converted to the output voltage through adjusting.
17. voltage adjusting methods according to claim 16, is characterized in that, this duty ratio numerical value is produced and adjusted by a computing circuit.
18. voltage adjusting methods according to claim 16, is characterized in that, this drive control signal is produced by a drive signal generation circuit, and with this duty ratio numerical value of this duty cycle reference value comparison be that acquisition is from this drive signal generation circuit.
19. voltage adjusting methods according to claim 16, is characterized in that, with this duty ratio numerical value of this duty cycle reference value comparison be that acquisition is from this drive control signal.
20. voltage adjusting methods according to claim 16, is characterized in that, also comprise:
When an input voltage changes, adjust this variable reference voltage;
Wherein, when this input voltage raises, this variable reference voltage increases gradually, and this duty ratio numerical value increases gradually through adjustment.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210357145.8A CN103683944B (en) | 2012-09-21 | 2012-09-21 | Voltage supply system, converter therein, and voltage adjustment method |
| TW101142837A TWI460977B (en) | 2012-09-21 | 2012-11-16 | Voltage supply system and converter therein, and voltage regulating method |
| US13/921,363 US9225251B2 (en) | 2009-07-29 | 2013-06-19 | Duty cycle control method, power supply system and power converter using the same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210357145.8A CN103683944B (en) | 2012-09-21 | 2012-09-21 | Voltage supply system, converter therein, and voltage adjustment method |
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| CN103683944A true CN103683944A (en) | 2014-03-26 |
| CN103683944B CN103683944B (en) | 2016-09-14 |
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| CN201210357145.8A Active CN103683944B (en) | 2009-07-29 | 2012-09-21 | Voltage supply system, converter therein, and voltage adjustment method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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Also Published As
| Publication number | Publication date |
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| TWI460977B (en) | 2014-11-11 |
| CN103683944B (en) | 2016-09-14 |
| TW201414153A (en) | 2014-04-01 |
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