CN201312262Y - High-frequency switch power supply with higher conversion efficiency - Google Patents
High-frequency switch power supply with higher conversion efficiency Download PDFInfo
- Publication number
- CN201312262Y CN201312262Y CNU2008202277131U CN200820227713U CN201312262Y CN 201312262 Y CN201312262 Y CN 201312262Y CN U2008202277131 U CNU2008202277131 U CN U2008202277131U CN 200820227713 U CN200820227713 U CN 200820227713U CN 201312262 Y CN201312262 Y CN 201312262Y
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- conversion efficiency
- power supply
- switch power
- frequency switch
- higher conversion
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
A high-frequency switch power supply with higher conversion efficiency belongs to the technical field of power supply, and is used to solve the problems of electrical energy conversion efficiency. The utility model adopts the technical scheme that the high-frequency switch power supply with higher conversion efficiency comprises an impulse transformer, a primary drive circuit and a secondary synchronous rectifying circuit, wherein the synchronous rectifying circuit comprises two electric inductances, two MOS pipes, two afterflow diodes and a filtering capacitor, two ends of secondary coils of the impulse transformer are respectively connected with one end of load through one electric inductance, and the other end of the load through the MOS pipes, the two afterflow diodes are respectively connected on the two MOS pipes in parallel, and the filtering capacitor is connected with the load in parallel. Compared with traditional switch power supply, the high-frequency switch power supply with higher conversion efficiency of the utility model has simple structure, low cost, small heat loss and high conversion efficiency.
Description
Technical field
The utility model relates to a kind of have high efficiency low-voltage, high-current switch power supply, belongs to power technique fields.
Background technology
In modern electronic equipments such as computer, server, the integrated level of managing chip is more and more higher, for the high frequency switch power of its power supply progressively to low-voltage, big sense of current development, the output voltage of Switching Power Supply has been reduced to 5V, 3.3V, 2.7V even lower at present, requires output current increasing under power the same terms.The secondary commutation part of tradition high frequency switch power adopts bridge rectifier or full-wave rectifying circuit mostly, and rectifier cell mainly adopts fast diode, then adopts Schottky diode during low pressure.Fig. 1 is a kind of structure of traditional semi-bridge switching voltage regulator, because Schottky diode has the conduction voltage drop of 0.3V, the also proportional increase of its thermal losses has limited the raising of switch power efficiency when the conducting electric current increases.In addition, the drive circuit of synchronous rectification low voltage MOS is general in the existing Switching Power Supply adopts self-driven circuit or uses special-purpose synchronous rectification chip drives mode, self-driven circuit complexity, and the scope of application is narrower, use special-purpose synchronous rectification chip then need dispose more peripheral circuit, cause cost to increase.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of thermal losses the high frequency switch power with higher conversion efficiency little, simple in structure, with low cost.
The alleged problem of the utility model realizes with following technical proposals:
A kind of high frequency switch power with higher conversion efficiency, by pulse transformer, pulse transformer former limit drive circuit and secondary synchronous rectification circuit are formed, described circuit of synchronous rectification is by two inductance, two metal-oxide-semiconductors, two fly-wheel diodes and a filter capacitor are formed, the two ends of described pulse transformer secondary coil are respectively through the output of an inductance as the connection load, simultaneously also respectively behind a metal-oxide-semiconductor as another output that connects load, described two fly-wheel diodes are connected in parallel respectively on two metal-oxide-semiconductors, and described filter capacitor is connected in parallel on the output.
Above-mentioned high frequency switch power with higher conversion efficiency, the grid of two metal-oxide-semiconductors of described circuit of synchronous rectification connect the output of the pulse width modulator in the drive circuit of pulse transformer.
The utility model reduces conduction voltage drop with the rectifier cell of low pressure metal-oxide-semiconductor as circuit of synchronous rectification greatly, and loss descends greatly.Circuit of synchronous rectification adopts and doubly flows rectifier system, and the average current of every inductance is half of output current, has simplified the technique for coiling of output inductor.The pulse control signal of rectifier cell grid is directly taken from the pulse width modulator of drive circuit in the circuit of synchronous rectification, and circuit structure is simplified greatly, has reduced cost.Compare with traditional Switching Power Supply, the utility model is not only simple in structure, with low cost, and thermal losses is little, the efficient height.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is a kind of structure of traditional semi-bridge switching voltage regulator;
Fig. 2 is an embodiment of the present utility model.
Each label is among the figure: Q1, Q2, S1～S4, metal-oxide-semiconductor; D1～D4, diode; R, Z, load; C1～C8, electric capacity; B, T, pulse transformer.
Embodiment
The both-end topology form of high frequency switch power has push-pull type, semibridge system, full-bridge type etc., is suitable for half bridge converter when input voltage is higher, is suitable for push-pull converter when input voltage is low.
Traditional half bridge converter as shown in Figure 1, its operation principle is: the pulse width modulator of secondary control is exported two groups of pulsewidth drive signals that have certain Dead Time phase phasic difference 180 degree, isolate rear drive power MOS pipe Q1 through isolating transformer, Q2, because the existence of Dead Time and phase difference, converter has following three kinds of operating states: 1, work as Q1, when Q2 ends, because C5=C6, the mid-point voltage of C5 and C6 is half of input voltage, 2, when the Q1 conducting, Q2 ends, C5 is by the elementary winding discharge of Q1 and high frequency transformer T, and is simultaneously to the C6 charging, negative just down on the elementary winding of high frequency transformer B2, connect the D3 positively biased conducting of the secondary winding of high frequency transformer T, load R power supply is given in inductance L 3 energy storage and to C8 charging simultaneously, and D4 instead ends partially.3, when the Q2 conducting, Q1 ends, and C6 is by the elementary winding discharge of Q2 and high frequency transformer T, negatively on the elementary winding of high frequency transformer T down just connect the D4 positively biased conducting of the secondary winding of high frequency transformer T, inductance L 3 energy storage are also charged to C8, give load R power supply simultaneously, D3 instead ends partially.Output voltage is sent into pulse width modulator through the output voltage ultramagnifier, the pulsewidth drive signal of pulse width modulator output, and power controlling MOSQ1, the Q2 ON time in certain cycle makes output voltage stabilization.The output rectifier diode adopts fast diode or Schottky diode, and output inductor adopts the high-frequency inductor of a large volume.
Referring to Fig. 2, front stage converter of the present utility model adopts the semibridge system topology, secondary using current double synchronous rectifier, high frequency transformer secondary used a winding instead, the two ends of winding meet one group of High frequency filter inductance L 1, L2 and synchronous rectifier S3, S4 respectively, pulse width modulator with adjustable Dead Time is selected the SG3525 chip of both-end output for use, and its 11P, 14P are the pulse-width signals of complementary output, phase phasic difference 180 degree.The signal of 11P drives S1 by driving isolating transformer, directly drives synchronous rectifier S3 simultaneously, and the shared drive signal of S1 and S3, is ended the while conducting.The signal of 14P drives S2 by driving isolating transformer, directly drives synchronous rectifier S4 simultaneously, and the shared drive signal of S2 and S4, is ended the while conducting.14P low level when the 11P high level, the S1 conducting is worked as, S2 ends, and the S3 conducting is worked as, and S4 ends, C1 is by the elementary winding discharge of S1 and high frequency transformer, to C2 charging, negative just down on the elementary winding of high frequency transformer B simultaneously, inductance L 1 energy storage of the secondary winding end of the same name of high frequency transformer B is also charged to C4, powering load returns through S3, and L2 is through the S3 afterflow.Capacitor C 3, C7 are capacitance, and it provides path for AC signal, and prevent that transformer core is saturated.When the 14P high level during 11P low level, the S2 conducting, S1 ends, the S4 conducting, and S3 ends, C2 is by the elementary winding discharge of S2 and high frequency transformer, on the elementary winding of high frequency transformer B negative down just, inductance L 2 energy storage of the secondary winding non-same polarity of high frequency transformer B and to C4 charging, powering load, electric current returns through S4, and L1 is through the S4 afterflow.Dead Time 11P, 14P at pulse width modulating chip are low level, and S1, S2 end, and S3, S4 also end, and High frequency filter inductance L 1, L2 are by D1, D2 afterflow.
Claims (2)
1, a kind of high frequency switch power with higher conversion efficiency, by pulse transformer (B), pulse transformer former limit drive circuit and secondary synchronous rectification circuit are formed, it is characterized in that, described circuit of synchronous rectification is by two inductance, two metal-oxide-semiconductors, two fly-wheel diodes and a filter capacitor (C4) are formed, the two ends of described pulse transformer (B) secondary coil are respectively through the output of an inductance as connection load (Z), simultaneously also respectively behind a metal-oxide-semiconductor as another output that connects load (Z), described two fly-wheel diodes are connected in parallel respectively on two metal-oxide-semiconductors, and described filter capacitor (C4) is connected in parallel on the output.
According to the described high frequency switch power of claim 1, it is characterized in that 2, the grid of two metal-oxide-semiconductors of described circuit of synchronous rectification connects the output of the pulse width modulator in the drive circuit of pulse transformer (B) with higher conversion efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202277131U CN201312262Y (en) | 2008-12-08 | 2008-12-08 | High-frequency switch power supply with higher conversion efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202277131U CN201312262Y (en) | 2008-12-08 | 2008-12-08 | High-frequency switch power supply with higher conversion efficiency |
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| Publication Number | Publication Date |
|---|---|
| CN201312262Y true CN201312262Y (en) | 2009-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008202277131U Expired - Fee Related CN201312262Y (en) | 2008-12-08 | 2008-12-08 | High-frequency switch power supply with higher conversion efficiency |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315756A (en) * | 2010-06-21 | 2012-01-11 | 康舒科技股份有限公司 | High-power density power supply for miniaturized server |
| CN104682546A (en) * | 2015-01-19 | 2015-06-03 | 杰兴电子科技（深圳）有限公司 | Digitalized double-excitation uninterrupted switching power supply |
| CN107332459A (en) * | 2017-08-19 | 2017-11-07 | 万江华 | The nanosecond class pulse generator for EDM system and control method of Wire EDM |
| CN108566097A (en) * | 2018-05-28 | 2018-09-21 | 钟曙 | A kind of times flow pattern week wave conversion High Frequency Link single-stage inverter circuit based on active clamp |
| CN110868090A (en) * | 2018-08-28 | 2020-03-06 | 中车大同电力机车有限公司 | SiC power module and electric locomotive storage battery charging circuit comprising same |
-
2008
- 2008-12-08 CN CNU2008202277131U patent/CN201312262Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315756A (en) * | 2010-06-21 | 2012-01-11 | 康舒科技股份有限公司 | High-power density power supply for miniaturized server |
| CN104682546A (en) * | 2015-01-19 | 2015-06-03 | 杰兴电子科技（深圳）有限公司 | Digitalized double-excitation uninterrupted switching power supply |
| CN107332459A (en) * | 2017-08-19 | 2017-11-07 | 万江华 | The nanosecond class pulse generator for EDM system and control method of Wire EDM |
| CN107332459B (en) * | 2017-08-19 | 2023-05-05 | 万江华 | Nanosecond pulse power supply system for wire-cut electric discharge machining and control method |
| CN108566097A (en) * | 2018-05-28 | 2018-09-21 | 钟曙 | A kind of times flow pattern week wave conversion High Frequency Link single-stage inverter circuit based on active clamp |
| CN110868090A (en) * | 2018-08-28 | 2020-03-06 | 中车大同电力机车有限公司 | SiC power module and electric locomotive storage battery charging circuit comprising same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen Guoyao Electronics Technology Co., Ltd. Assignor: Shijiazhuang Guoyuo Electrnic Science & Technology Co., Ltd. Contract record no.: 2010440000229 Denomination of utility model: High-frequency switch power supply with higher conversion efficiency Granted publication date: 20090916 License type: Exclusive License Record date: 20100308 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090916 Termination date: 20141208 |
|
| EXPY | Termination of patent right or utility model |