CN201893704U - Device for amending resonance drifting of series resonance switch converter by using table lookup method - Google Patents
Device for amending resonance drifting of series resonance switch converter by using table lookup method Download PDFInfo
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- CN201893704U CN201893704U CN2010206357151U CN201020635715U CN201893704U CN 201893704 U CN201893704 U CN 201893704U CN 2010206357151 U CN2010206357151 U CN 2010206357151U CN 201020635715 U CN201020635715 U CN 201020635715U CN 201893704 U CN201893704 U CN 201893704U
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- 230000005670 electromagnetic radiation Effects 0.000 description 3
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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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- 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
本实用新型涉及一种修正开关变换器谐振漂移的装置，特别是涉及一种利用查表法修正串联谐振开关变换器谐振漂移的装置。解决现有技术中基于串联谐振开关变换器技术设计的电容器充电电源中谐振频率漂移，引起的变换器开关非零关断的问题，提供一种利用查表法修正串联谐振充电电源谐振漂移的装置及方法，在谐振频率发生漂移时，改变变换器开关的导通时间，而维持谐振频率与变换器开关时间的关系不变，使变换器始终在零电流开关。技术方案：包括变换器、谐振电路、变压器、整流电路、储能电容、驱动电路、数字控制器、查表模块，数字控制器与查表模块电连接。本实用新型主要应用于串联谐振变换器式电容器充电电源零电流状态的场合。
The utility model relates to a device for correcting the resonance drift of a switching converter, in particular to a device for correcting the resonance drift of a series resonance switching converter by using a look-up table method. Solve the problem of non-zero turn-off of the converter switch caused by the resonant frequency drift in the capacitor charging power supply designed based on the series resonant switching converter technology in the prior art, and provide a device for correcting the resonance drift of the series resonant charging power supply by using the look-up table method And the method, when the resonant frequency drifts, the conduction time of the converter switch is changed, and the relationship between the resonant frequency and the converter switching time is kept unchanged, so that the converter is always switched at zero current. Technical solution: including a converter, a resonant circuit, a transformer, a rectifier circuit, an energy storage capacitor, a drive circuit, a digital controller, a table lookup module, and the digital controller is electrically connected to the table lookup module. The utility model is mainly used in the zero-current state of the capacitor charging power supply of the series resonant converter type.
Description
Technical field
The utility model relates to a kind of device of revising the drift of switch converters resonance, particularly relates to a kind of device that utilizes the series resonant switched converter resonance drift of look-up table correction.
Background technology
The high-voltage capacitor charge power supply is based on the high-frequency converter art designs, and the topology of converter is series resonant switched transformer configuration.The characteristics of this topology are converter switches actions when resonance current is zero, and the ON time of converter switches and resonance frequency are fixed value, and have certain relation.Switch turn-offs when getting back to zero the first time that each resonance current takes place, and just so-called Zero Current Switch (soft switch) has avoided switch to switch when its electric current non-zero and the so-called hard switching phenomenon that occurs.The change that relies on switching frequency is regulated in power supply output.Yet resonance frequency is inevitably drifted about in the high-voltage charging engineering, makes not action when resonance current is zero of converter switches, causes the characteristic of converter to change.Therefore design a kind of automatic monitoring and judge the circuit of resonance frequency drift, it can be when the converter of charge power supply be working properly no-output, when the existing non-zero current switch situation of converter, export a pulse voltage signal.Can adjust the converter switches state with this signal, recover normal characteristic.IEEE?Transactions?on?Industrial?Electronics，Vol.38，No.6，
" a kind of employing series resonance topology in the industrial electronic journal, fixing ON time, the capacitor charging power supply of variable frequency control and Zero Current Switch " (A capacitor-charging power suppleusing a series-resonant lopology, constant on-time/vfariabefrequenency control, and zero-current switching IEEE Transactionson Industrial Electronics, Vol.38, No.6, December, 1991), this capacitor charging power supply has been done detailed description.But power supply is under its situation that the output transformer no-load voltage ratio is big and load variations is also big, and the distributed capacitance of transformer can make resonance frequency change.Converter is switch during zero current no longer, and the current stress of converter switches device and electromagnetic radiation are strengthened.This phenomenon this article has been done to ignore processing.Therefore, this class capacitor charging power supply is all used the current parameters value that strengthens the converter switches device, locates the reply problem, obviously also unresolved electromagnetic radiation.Way is to use other converter topology design charge power supply instead in addition.At " application of series parallel resonance converter in capacitor charging power supply " (Using the series parallel resonant converter in capacitorcharging applications.The 7th Applied Power Electronics Conferenceand Exposition, Barry C Pollard, Boston, M A, USA, 1992) in, with and with series-multiple connection controlled resonant converter mode design capacitance device charge power supply, because operation principle is different thereby do not relate to above-mentioned phenomenon.But this capacitor charging power supply is not as good as adopting series resonance Zero Current Switch converter design capacitor charging power to use extensively.
Problem to occurring like this: one is to ignore, and another takes other circuit topological structure design.The reason of ignoring is that series resonance Zero Current Switch converter is to rely on the floatless switch time, and the mode that changes switching frequency is worked.And there are fixing corresponding relation in switching time and resonance frequency.The utility model is regulated the converter switches time automatically at the drift of resonance frequency, can keep its fixing corresponding relation
Summary of the invention
The purpose of this utility model is to solve in the prior art based on resonance frequency drift in the capacitor charging power supply of series resonant switched converter art designs, the problem that the converter switches non-zero that causes turn-offs, a kind of device that utilizes the drift of look-up table correction series resonance charge power supply resonance is provided, when drift takes place in resonance frequency, change the ON time of converter switches, and keep resonance frequency and the converter switches time relation constant, make converter all the time at Zero Current Switch.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of device with the series resonant switched converter resonance drift of look-up table correction, comprise converter, resonant circuit, transformer, rectification circuit, storage capacitor, drive circuit, digitial controller, table look-up module, wherein table look-up module is electrically connected with digitial controller.
From above-mentioned architectural feature of the present utility model as can be seen, its advantage is: pass through table look-up module, move in the time of can making converter switches in the series resonant converter formula capacitor charging power supply remain at zero current, improved the efficient of power supply, elimination is produced electromagnetic radiation because of the non-zero current switch and is polluted; Do not strengthen the conveyance capacity of converter switches device or the hardware configuration of change circuit yet, thereby saved production cost.
Description of drawings
The utility model will illustrate by way of compared with accompanying drawings and combined with example:
Fig. 1 Fig. 1 is the capacitor charging power supply block diagram based on the series resonant full bridge converter of full-digital control.L, C constitute series resonant circuit among the figure.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Design principle: if the converter switches control system of charge power supply is digital, its feature is that the switch control of converter etc. is that used control chip is DSP (digital signal processor), FPGA (field programmable gate array), PLC (Programmable Logic Controller) or microprocessor normally by table look-up module decision in the controller.Then can utilize the corresponding relation of the output of electric power output voltage and controller drives, a power supply is set under different output voltages, the drift about function table of corresponding driving pulse width of resonance frequency is put into the controller table look-up module, get final product the switch drive of Correction and Control device output during work by table look-up module, make its change of following resonance frequency automatically, thereby prevent that the non-zero current on-off phenomenon that the resonance frequency drift causes from taking place.
The concrete mistake is called: the corresponding relation that utilizes the output of electric power output voltage and controller drives, a power supply is set under different output voltages, what resonance frequency drifted about that the function table of corresponding driving pulse width puts into digitial controller searches module (program storage), during work by searching the switch drive that the module lookup table mode can the output of Correction and Control device.According to different charge power supply output voltage values, find corresponding converter driving pulse width time data, as new converter switches ON time.This change makes the zero passage moment of corresponding all the time resonance current half period of driving pulse width.
In the power-supply system of Fig. 1, obtain the ON time error of resonance frequency drift and converter switches with experiment or calculation mode.Here be example with the experiment, make the charge power supply band that does not have to correct carry work earlier, measure series circuit resonance frequency f value, converter switches ON time T, and under difference output voltage constantly, respective resonant frequencies finishes up to charging.For example: the charger output voltage be respectively V0, V1, V2 ... Vt, the resonance frequency of corresponding converter current is: f0, f1, f2...ft, turn-off the phase difference in the moment with converter switches the zero point of corresponding harmonic wave: w0, w1, w2...wt.Switch conduction time and phase difference value addition, obtain a different converter switches ON time group then: T+w0, T+w1, T+w2 ... T+wt.Obviously, all corresponding corresponding charger output voltage values of each value of this group promptly draws the converter switches time correspondence table under an output voltage and the different resonance frequencys, then its mode with program is deposited in the table look-up module.Like this when charge power supply is worked, when different magnitudes of voltage feeds back in the controller, table look-up module with in the program with output voltage switching signals corresponding, different ON time, from table look-up module, take out, replace the original switch conduction time, the driving transducer switch.Therefore, guaranteed that converter switches is zero place action all the time at resonance current.The data set value is short more blanking time, and the shutoff of its switch is got over the zero point of convergence resonance current constantly.
Disclosed all features in this specification except mutually exclusive feature, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
Claims (1)
1. device with the drift of the series resonant switched converter resonance of look-up table correction, comprise converter, resonant circuit, transformer, rectification circuit, storage capacitor, drive circuit, it is characterized in that also comprising digitial controller, table look-up module, converter, resonant circuit, transformer, rectification circuit, storage capacitor, digitial controller, drive circuit are electrically connected in proper order, and wherein table look-up module is electrically connected with digitial controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010206357151U CN201893704U (en) | 2010-11-30 | 2010-11-30 | Device for amending resonance drifting of series resonance switch converter by using table lookup method |
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| CN2010206357151U CN201893704U (en) | 2010-11-30 | 2010-11-30 | Device for amending resonance drifting of series resonance switch converter by using table lookup method |
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| CN201893704U true CN201893704U (en) | 2011-07-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005927A (en) * | 2010-11-30 | 2011-04-06 | 中国工程物理研究院流体物理研究所 | Device and method for modifying resonance drift of serial connection resonance switch converter by using table checking method |
| CN103858304B (en) * | 2011-07-27 | 2016-07-06 | 西门子公司 | Transformator electronic circuit |
-
2010
- 2010-11-30 CN CN2010206357151U patent/CN201893704U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005927A (en) * | 2010-11-30 | 2011-04-06 | 中国工程物理研究院流体物理研究所 | Device and method for modifying resonance drift of serial connection resonance switch converter by using table checking method |
| CN103858304B (en) * | 2011-07-27 | 2016-07-06 | 西门子公司 | Transformator electronic circuit |
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Granted publication date: 20110706 Termination date: 20151130 |
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| EXPY | Termination of patent right or utility model |