CN102751857A - Passive lossless buffering circuit of power factor correction circuit - Google Patents
Passive lossless buffering circuit of power factor correction circuit Download PDFInfo
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- CN102751857A CN102751857A CN2012102525984A CN201210252598A CN102751857A CN 102751857 A CN102751857 A CN 102751857A CN 2012102525984 A CN2012102525984 A CN 2012102525984A CN 201210252598 A CN201210252598 A CN 201210252598A CN 102751857 A CN102751857 A CN 102751857A
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Abstract
The invention discloses a passive lossless buffering circuit of a power factor correction circuit. The passive lossless buffering circuit comprises boost inductors, auxiliary coupling inductors, a main power switch, a buffering capacitor and fast recovery diodes, wherein a main boost inductor and a secondary boost inductor are connected; the secondary boost inductor is connected with a first auxiliary coupling inductor and one end of a second auxiliary coupling inductor; the other end of the second auxiliary coupling inductor, a first diode anode, a third diode anode and the main power switch are connected; the other end of the first auxiliary coupling inductor, a second diode anode and one end of the buffering capacitor are connected; the other end of the buffering capacitor and a third diode cathode are connected; the connection point of the buffering capacitor and the third diode is connected with a fourth diode anode; and the cathodes of the first diode, the second diode and the fourth diode are electrically connected. With the adoption of the passive lossless buffering circuit of the power factor correction circuit, the reverse recovery problem of the diode can be effectively controlled, the switching loss is reduced, the reverse recovery energy can be stored by the buffering capacitor and the energy is transmitted to a load, so that the conversion efficiency is improved, and at the same time, the electromagnetic interference of electric equipment is effectively reduced.
Description
Technical field
The present invention relates to field of switch power, especially relate to a kind of passive lossless snubber circuit of circuit of power factor correction.
Background technology
Civil power is present our too busy to get away a kind of energy source of living, and numerous power consumption equipments produces many influences because a variety of causes can produce a large amount of Harmonic Interference to city's electrical network.
Power consumption equipment such as converter have two kinds of mode of operations; Continuous current mode and electric current discontinuous mode; When converter is operated in continuous current mode; Open the commutation course that can have switching tube and the common state of rectifying tube constantly at switching tube, the electric current of rectifying tube is with rapid pole changer pipe in this process, and the too fast rising of the electric current of switching tube causes the switching tube loss bigger; And the too fast decline of the electric current of rectifying tube possibly cause big reverse recovery current, finally causes harmful effects such as transducer effciency reduction and electromagnetic noise are bigger.
How to reduce the harmonic wave of power consumption equipment; Promptly suppress the electromagnetic interference (EMI) of power consumption equipment,, force the strict homophase of voltage and current through alignment technique exactly so produced this notion of power factor correction (PFC); Thereby improved power factor, reduced the interference of harmonic wave electrical network.And the demand of non-renewable energy resources is increasing; And its reserves are fewer and feweri, when power factor is provided, improve power-efficient, and that also tries one's best when improving power factor raises the efficiency; Thereby reaching the requirement of " green energy resource ", is one of technical staff's problem demanding prompt solution.
Summary of the invention
The defective that The present invention be directed to the existence of above-mentioned background technology provides a kind of reverse-recovery problems of effective inhibition diode, reduces switching loss, improves conversion efficiency, improves the passive lossless snubber circuit of the circuit of power factor correction of power supply reliability.
For realizing above-mentioned purpose; The invention discloses a kind of passive lossless snubber circuit of circuit of power factor correction; It comprises main boost inductance, inferior boost inductance, the first auxiliary coupling inductance, the second auxiliary coupling inductance, master power switch, buffer capacitor, first diode, second diode, the 3rd diode and the 4th diode; Said main boost inductance one end is connected with voltage input end; The said main boost inductance other end and said boost inductance end of the same name electrically connect; Said the boost inductance non-same polarity and the said first auxiliary coupling inductance end of the same name and second auxiliary coupling inductance end of the same name electrically connect, and the said second auxiliary coupling inductance non-same polarity, first diode anode, the 3rd diode anode and master power switch drain electrode are electrically connected said master power switch source ground; The said first auxiliary coupling inductance non-same polarity, second diode anode and buffer capacitor one end are electrically connected; The said buffer capacitor other end and the 3rd diode cathode electrically connect; Said buffer capacitor and the 3rd diode contact electrically connect the 4th diode anode, and said first diode cathode, second diode cathode and the 4th diode cathode are electrically connected.
Further, the said first auxiliary coupling inductance and the second auxiliary coupling inductance are with in the same way form and be around on the magnetic core, and the said first auxiliary coupled inductor number of turn is assisted the coupled inductor number of turn greater than second.
Further, said the 4th diode cathode corresponding circuits voltage outlet side.
Further, said first diode, second diode, the 3rd diode and the 4th diode are fast recovery diode.
In sum; The passive lossless snubber circuit of a kind of circuit of power factor correction of the present invention,, is assisted under the effect of coupling inductance first when master power switch is opened at continuous current mode through circuit working; The current changing rate of fast recovery diode reduces, thereby has reduced reverse recovery loss; Buffer capacitor can be stored reverse recovery energy, and gives load with this part power transfer, thereby improves conversion efficiency; The effect of the first auxiliary coupling inductance is to produce an induced potential at the master power switch blocking interval; Under the effect of this induced potential; Make the second auxiliary coupling inductance at master power switch blocking interval reset-to-zero, get ready with realization master power switch zero current turning-on for next switch periods suppresses diode reverse recovery.
Description of drawings
Fig. 1 is the circuit theory diagrams of the embodiment of the invention.
Embodiment
For further understanding characteristic of the present invention, technological means and the specific purposes that reached, function, the present invention is described in further detail below in conjunction with accompanying drawing and embodiment.
As shown in Figure 1; The passive lossless snubber circuit of a kind of circuit of power factor correction of the present invention comprises main boost inductance L1, inferior boost inductance L2, the first auxiliary coupling inductance L3, the second auxiliary coupling inductance L4, master power switch S, buffer capacitor C, the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4; Said main boost inductance L1 one end is connected with voltage input end Vin; The said main boost inductance L1 other end and said boost inductance L2 end of the same name electrically connect; Said the boost inductance L2 non-same polarity and the said first auxiliary coupling inductance L3 end of the same name and second auxiliary coupling inductance L4 end of the same name electrically connect; The said first auxiliary coupling inductance L3 and second assists coupling inductance L4 with in the same way form and be around on the magnetic core; It is m:n that the said first auxiliary coupling inductance L3 coil turn and second is assisted the ratio of coupling inductance L4 coil turn, m＞n wherein, m:n=9:1 in the present embodiment.
The said second auxiliary coupling inductance L4 non-same polarity, the first diode D1 anode, the 3rd diode D3 anode and master power switch S drain electrode are electrically connected said master power switch S source ground; The said first auxiliary coupling inductance L3 non-same polarity, the second diode D2 anode and buffer capacitor C one end are electrically connected; The said buffer capacitor C other end and the 3rd diode D3 negative electrode electrically connect; Said buffer capacitor C and the 3rd diode D3 contact electrically connect the 4th diode D4 anode; The said first diode D1 negative electrode, the second diode D2 negative electrode and the 4th diode D4 negative electrode are electrically connected; Said the 4th diode D4 negative electrode corresponding circuits voltage outlet side Vout, the said first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 are fast recovery diode.
The operation principle of circuit of the present invention is following; Before master power switch S is in conducting state; Main boost inductance L1, inferior boost inductance L2 and the first auxiliary coupling inductance L3 form an energy-storage units; Main boost inductance L1, inferior boost inductance L2 and the second auxiliary coupling inductance L4 form another energy-storage units, carry out energy storage simultaneously; Because the first auxiliary coupling inductance L3 coil ratio second auxiliary coupling inductance L4 coil turn is many; This moment first, auxiliary coupling inductance L3 inductance value was greater than the second auxiliary coupling inductance L4 inductance value; Before the next switch periods of master power switch S arrives; Electric current on the second auxiliary coupling inductance L4 is coupled on the first auxiliary coupling inductance L3; Be zero with the master power switch S contact place electric current that the second auxiliary coupling inductance L4 electrically connects this moment, thereby realize the zero current turning-on (ZCS) of master power switch S when next switch periods arrives.
The reverse recovery current of the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 is because the existence of first booster diode and buffer capacitor C; Utilize the principle that electric current can not suddenly change and the electric capacity voltage can not be suddenlyd change in the inductance; Suppress the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 reverse current and high voltage, do not formed conduction loss.
In addition, the first auxiliary coupling inductance L3, buffer capacitor C and the 3rd diode D3 form a resonant tank, and the second auxiliary coupling inductance L4, buffer capacitor C and the 3rd diode D3 form another resonant tank; At this moment; On current transfer to the three diode D3 of master power switch S, simultaneously, the first auxiliary coupling inductance L3 two ends can produce induced potential; Under the effect of the first auxiliary coupling inductance L3 and buffer capacitor C; Electric current linearity on the second auxiliary coupling inductance L4 reduces, and the electric current of the 3rd diode D3 is linear to be increased, and the voltage of buffer capacitor C descends; The reverse recovery power transfer that is stored among the buffer capacitor C is transferred to load through voltage outlet side Vout, has realized no-voltage shutoff (ZVS).
In sum; The passive lossless snubber circuit of a kind of circuit of power factor correction of the present invention passes through circuit working at continuous current mode; When master power switch S opens; Under the effect of the first auxiliary coupling inductance L3, the current changing rate of fast recovery diode reduces, thereby has reduced reverse recovery loss; Buffer capacitor C can store reverse recovery energy, and gives load with this part power transfer, thereby improves conversion efficiency, and whole efficient can reach 97.5%, and then reduces the spike that hard switching produces, and electromagnetic interference is improved significantly; The effect of the first auxiliary coupling inductance L3 is to produce an induced potential at master power switch S blocking interval; Under the effect of this induced potential; Make the second auxiliary coupling inductance L4 at master power switch S blocking interval reset-to-zero, for next switch periods suppresses diode reverse recovery and realizes that master power switch S zero current turning-on is ready.
The above embodiment has only expressed one embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as limitation of the scope of the invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with accompanying claims.
Claims (4)
1. the passive lossless snubber circuit of a circuit of power factor correction; It is characterized in that: comprise main boost inductance, inferior boost inductance, the first auxiliary coupling inductance, the second auxiliary coupling inductance, master power switch, buffer capacitor, first diode, second diode, the 3rd diode and the 4th diode; Said main boost inductance one end is connected with voltage input end; The said main boost inductance other end and said boost inductance end of the same name electrically connect; Said the boost inductance non-same polarity and the said first auxiliary coupling inductance end of the same name and second auxiliary coupling inductance end of the same name electrically connect; The said second auxiliary coupling inductance non-same polarity, first diode anode, the 3rd diode anode and master power switch drain electrode are electrically connected said master power switch source ground; The said first auxiliary coupling inductance non-same polarity, second diode anode and buffer capacitor one end are electrically connected; The said buffer capacitor other end and the 3rd diode cathode electrically connect; Said buffer capacitor and the 3rd diode contact electrically connect the 4th diode anode, and said first diode cathode, second diode cathode and the 4th diode cathode are electrically connected.
2. the passive lossless snubber circuit of circuit of power factor correction according to claim 1; It is characterized in that: the said first auxiliary coupling inductance and the second auxiliary coupling inductance are with in the same way form and be around on the magnetic core, and the said first auxiliary coupled inductor number of turn is assisted the coupled inductor number of turn greater than second.
3. the passive lossless snubber circuit of circuit of power factor correction according to claim 1 is characterized in that: said the 4th diode cathode corresponding circuits voltage outlet side.
4. the passive lossless snubber circuit of circuit of power factor correction according to claim 1, it is characterized in that: said first diode, second diode, the 3rd diode and the 4th diode are fast recovery diode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210252598.4A CN102751857B (en) | 2012-07-20 | 2012-07-20 | Passive lossless buffering circuit of power factor correction circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210252598.4A CN102751857B (en) | 2012-07-20 | 2012-07-20 | Passive lossless buffering circuit of power factor correction circuit |
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| CN102751857A true CN102751857A (en) | 2012-10-24 |
| CN102751857B CN102751857B (en) | 2014-12-31 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647538A (en) * | 2013-12-05 | 2014-03-19 | 华北电力大学 | Solid-state switch and detection apparatus for high-voltage loop |
| WO2014170501A2 (en) * | 2013-04-19 | 2014-10-23 | Zentrum Mikroelektronik Dresden Ag | System and method for regulation of multi-level boost based rectifiers with power factor correction |
| CN107331337A (en) * | 2017-07-31 | 2017-11-07 | 京东方科技集团股份有限公司 | Array base palte and its test device, method and display device |
| CN110277905A (en) * | 2019-07-22 | 2019-09-24 | 哈尔滨理工大学 | Digital control method, power factor correction stage and the power factor correcting method of power supply |
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| CN1457136A (en) * | 2003-03-05 | 2003-11-19 | 艾默生网络能源有限公司 | Low-loss DC/DC booster circuit |
| CN1956304A (en) * | 2005-10-28 | 2007-05-02 | 中兴通讯股份有限公司 | Inhibition method for diode reverse recovery current and its circuit |
| US7233507B2 (en) * | 2005-05-18 | 2007-06-19 | Optimum Power Conversion, Inc. | Non dissipative snubber circuit with saturable reactor |
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2012
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| CN1457136A (en) * | 2003-03-05 | 2003-11-19 | 艾默生网络能源有限公司 | Low-loss DC/DC booster circuit |
| US7233507B2 (en) * | 2005-05-18 | 2007-06-19 | Optimum Power Conversion, Inc. | Non dissipative snubber circuit with saturable reactor |
| CN1956304A (en) * | 2005-10-28 | 2007-05-02 | 中兴通讯股份有限公司 | Inhibition method for diode reverse recovery current and its circuit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014170501A2 (en) * | 2013-04-19 | 2014-10-23 | Zentrum Mikroelektronik Dresden Ag | System and method for regulation of multi-level boost based rectifiers with power factor correction |
| WO2014170501A3 (en) * | 2013-04-19 | 2015-04-23 | Zentrum Mikroelektronik Dresden Ag | System and method for regulation of multi-level boost based rectifiers with power factor correction |
| US9819283B2 (en) | 2013-04-19 | 2017-11-14 | Idt Europe Gmbh | System and method for regulation of multi-level boost based rectifiers with power factor correction |
| CN103647538A (en) * | 2013-12-05 | 2014-03-19 | 华北电力大学 | Solid-state switch and detection apparatus for high-voltage loop |
| CN107331337A (en) * | 2017-07-31 | 2017-11-07 | 京东方科技集团股份有限公司 | Array base palte and its test device, method and display device |
| CN110277905A (en) * | 2019-07-22 | 2019-09-24 | 哈尔滨理工大学 | Digital control method, power factor correction stage and the power factor correcting method of power supply |
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| CN102751857B (en) | 2014-12-31 |
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Address after: 523330 Guangdong Province, Dongguan City Shek Pai Zhenmiao edge Shajing Village Road nine Applicant after: Dongguan Mentech Optical & Magnetic Co., Ltd. Address before: 523330 Guangdong Province, Dongguan City Shek Pai Zhenmiao edge Shajing Village Road nine Applicant before: Dongguan Mentech Electronic Co., Ltd. |
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