CN102751857B - 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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- CN102751857B CN102751857B CN201210252598.4A CN201210252598A CN102751857B CN 102751857 B CN102751857 B CN 102751857B CN 201210252598 A CN201210252598 A CN 201210252598A CN 102751857 B CN102751857 B CN 102751857B
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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 that at present we live too busy to get away a kind of energy source, and the humorous wave interference that numerous power consumption equipments is a large amount of because a variety of causes can produce, many impacts are produced on utility grid.
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, the commutation course that the moment can exist switching tube and the common state of rectifying tube is opened at switching tube, in this process, the electric current of rectifying tube incites somebody to action sharply pole changer pipe, the too fast rising of electric current of switching tube causes switching tube loss larger, and the too fast decline of the electric current of rectifying tube may cause large reverse recovery current, finally cause the harmful effects such as transducer effciency reduces and electromagnetic noise is larger.
How to reduce the harmonic wave of power consumption equipment, namely the electromagnetic interference (EMI) of power consumption equipment is suppressed, so create power factor correction (PFC) this concept, the strict homophase of voltage and current is forced exactly by alignment technique, thus improve power factor, reduce harmonic wave to the interference of electrical network.And the demand of non-renewable energy resources is increasing, and its reserves are fewer and feweri, while providing power factor, improve power-efficient, that also tries one's best while improving power factor raises the efficiency, thus reach the requirement of " green energy resource ", be one of technical staff's problem demanding prompt solution.
Summary of the invention
The defect that the present invention be directed to the existence of above-mentioned background technology provides a kind of reverse-recovery problems of effective twin zener dioder, reduces switching loss, improves conversion efficiency, improve the passive lossless snubber circuit of the circuit of power factor correction of power supply reliability.
For achieving the above object, the invention discloses a kind of passive lossless snubber circuit of circuit of power factor correction, it comprises main boost inductance, secondary boost inductance, first auxiliary coupling inductance, second auxiliary coupling inductance, master power switch, buffer capacitor, first diode, second diode, 3rd diode and the 4th diode, described main boost inductance one end is connected with voltage input end, the described main boost inductance other end and described boost inductance Same Name of Ends are electrically connected, described boost inductance non-same polarity and the described first auxiliary coupling inductance Same Name of Ends and second assist coupling inductance Same Name of Ends to be electrically connected, described second auxiliary coupling inductance non-same polarity, first diode anode, 3rd diode anode and master power switch drain electrode are electrically connected, described master power switch source ground, described first auxiliary coupling inductance non-same polarity, the second diode anode and buffer capacitor one end are electrically connected, the described buffer capacitor other end and the 3rd diode cathode are electrically connected, described buffer capacitor and the 3rd diode junction are electrically connected the 4th diode anode, and described first diode cathode, the second diode cathode and the 4th diode cathode are electrically connected.
Further, the described first auxiliary coupling inductance and second is assisted coupling inductance with form in the same way and is around on a magnetic core, and the described first auxiliary coupled inductor number of turn is greater than the second auxiliary coupled inductor number of turn.
Further, described 4th diode cathode corresponding circuits voltage outlet side.
Further, described first diode, the 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 by circuit working at continuous current mode, when master power switch is opened, under the effect of the first auxiliary coupling inductance, the current changing rate of fast recovery diode reduces, thus reduces reverse recovery loss; Buffer capacitor can store Reverse recovery energy, and by this part Energy Transfer to load, thus improve conversion efficiency; The effect of the first auxiliary coupling inductance produces an induced potential at 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, for next switch periods twin zener dioder Reverse recovery with to realize master power switch zero current turning-on ready.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the embodiment of the present invention.
Embodiment
For feature of the present invention, technological means and the specific purposes reached, function can be understood further, below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
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, secondary boost inductance L2, first auxiliary coupling inductance L3, second auxiliary coupling inductance L4, master power switch S, buffer capacitor C, first diode D1, second diode D2, 3rd diode D3 and the 4th diode D4, described main boost inductance L1 one end is connected with voltage input end Vin, the described main boost inductance L1 other end and described boost inductance L2 Same Name of Ends are electrically connected, described boost inductance L2 non-same polarity and the described first auxiliary coupling inductance L3 Same Name of Ends and second assist coupling inductance L4 Same Name of Ends to be electrically connected, described first auxiliary coupling inductance L3 and second assists coupling inductance L4 with form in the same way and is around on a magnetic core, the ratio of the described first auxiliary coupling inductance L3 coil turn and the second auxiliary coupling inductance L4 coil turn is m:n, wherein m > n, m:n=9:1 in the present embodiment.
Described 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 is electrically connected, described master power switch S source ground, described first auxiliary coupling inductance L3 non-same polarity, second diode D2 anode and buffer capacitor C one end are electrically connected, the described buffer capacitor C other end and the 3rd diode D3 negative electrode are electrically connected, described buffer capacitor C and the 3rd diode D3 contact are electrically connected the 4th diode D4 anode, described first diode D1 negative electrode, second diode D2 negative electrode and the 4th diode D4 negative electrode are electrically connected, described 4th diode D4 negative electrode corresponding circuits voltage outlet side Vout, described first diode D1, second diode D2, 3rd diode D3 and the 4th diode D4 is fast recovery diode.
The operation principle of circuit of the present invention is as follows, before master power switch S is in conducting state, the auxiliary coupling inductance L3 of main boost inductance L1, secondary boost inductance L2 and first forms an energy-storage units, the auxiliary coupling inductance L4 of main boost inductance L1, secondary boost inductance L2 and second forms another energy-storage units, carries out energy storage simultaneously; Because the first auxiliary coupling inductance L3 coil ratio second assists coupling inductance L4 coil turn many, now the first auxiliary coupling inductance L3 inductance value is greater than the second auxiliary coupling inductance L4 inductance value, before the next switch periods of master power switch S arrives, on the auxiliary coupling inductance L3 of current coupling to the first on second auxiliary coupling inductance L4, the master power switch S contact place electric current that now auxiliary coupling inductance L4 is electrically connected with second is zero, thus realizes 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 the first booster diode and buffer capacitor C, utilize the principle that in inductance, electric current can not suddenly change and electric capacity both end voltage can not be suddenlyd change, inhibit the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 reverse current and high voltage, do not form conduction loss.
In addition, first auxiliary coupling inductance L3, buffer capacitor C and the 3rd diode D3 forms a resonant tank, second auxiliary coupling inductance L4, buffer capacitor C and the 3rd diode D3 forms another resonant tank, now, the current transfer of master power switch S is on the 3rd diode D3, simultaneously, 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 on second auxiliary coupling inductance L4 linearly reduces, the electric current of the 3rd diode D3 linearly increases, the voltage drop of buffer capacitor C, the Reverse recovery Energy Transfer be stored in buffer capacitor C is transferred to load by voltage outlet side Vout, achieve zero voltage turn-off (ZVS).
In sum, the passive lossless snubber circuit of a kind of circuit of power factor correction of the present invention by 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, thus reduces reverse recovery loss; Buffer capacitor C can store Reverse recovery energy, and by this part Energy Transfer to load, thus improving conversion efficiency, overall efficiency can reach 97.5%, and then reduces the spike of hard switching generation, and electromagnetic interference is improved significantly; The effect of the first auxiliary coupling inductance L3 produces 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 twin zener dioder Reverse recovery with to realize master power switch S zero current turning-on ready.
The above embodiment only have expressed one embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as limitation of the scope of the invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, 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 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, secondary boost inductance, first auxiliary coupling inductance, second auxiliary coupling inductance, master power switch, buffer capacitor, first diode, second diode, 3rd diode and the 4th diode, described main boost inductance one end is connected with voltage input end, the described main boost inductance other end and described boost inductance Same Name of Ends are electrically connected, described boost inductance non-same polarity and the described first auxiliary coupling inductance Same Name of Ends and second assist coupling inductance Same Name of Ends to be electrically connected, described second auxiliary coupling inductance non-same polarity, first diode anode, 3rd diode anode and master power switch drain electrode are electrically connected, described master power switch source ground, described first auxiliary coupling inductance non-same polarity, the second diode anode and buffer capacitor one end are electrically connected, the described buffer capacitor other end and the 3rd diode cathode are electrically connected, described buffer capacitor and the 3rd diode junction are electrically connected the 4th diode anode, and described first diode cathode, the 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 described first auxiliary coupling inductance and second is assisted coupling inductance with form in the same way and is around on a magnetic core, the described first auxiliary coupled inductor number of turn is greater than the second auxiliary coupled inductor number of turn.
3. the passive lossless snubber circuit of circuit of power factor correction according to claim 1, is characterized in that: described 4th diode cathode corresponding circuits voltage outlet side.
4. the passive lossless snubber circuit of circuit of power factor correction according to claim 1, is characterized in that: described first diode, the 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 CN102751857A (en) | 2012-10-24 |
| CN102751857B true CN102751857B (en) | 2014-12-31 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI551017B (en) | 2013-04-19 | 2016-09-21 | 中心微電子德累斯頓股份公司 | System and method for regulating operation of non-symmetric boost based front end stage of rectifier with power factor correction, and system and method for reducing volume and losses of boost inductor in pfc rectifier |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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
- 2012-07-20 CN CN201210252598.4A patent/CN102751857B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Non-Patent Citations (3)
| Title |
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| A boost PFC rectifier with a passive lossless snubber circuit using coupled inductors methods;Ho-Sung Kim et al.,;《Applied Power Electronics Conference and Exposition (APEC), 2012 Twenty-Seventh Annual IEEE》;20120209;第1148-1152页 * |
| A continuous current mode boost converter with modified flying capacitor lossless snubber;Kyu-Min Cho et al.,;《Energy Conversion Congress and Exposition (ECCE), 2010 IEEE》;20100916;全文 * |
| A simple passive ZCS circuit for PFC converter;K.I.Hwu et al.,;《Applied Power Electronics Conference and Exposition (APEC), 2008 Twenty-Third Annual IEEE》;20080228;第1022-1026页 * |
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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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