CN202167984U - PFC (Power Factor Correction) circuit for high input voltage - Google Patents
PFC (Power Factor Correction) circuit for high input voltage Download PDFInfo
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- CN202167984U CN202167984U CN2011202873061U CN201120287306U CN202167984U CN 202167984 U CN202167984 U CN 202167984U CN 2011202873061 U CN2011202873061 U CN 2011202873061U CN 201120287306 U CN201120287306 U CN 201120287306U CN 202167984 U CN202167984 U CN 202167984U
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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
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Abstract
The utility model discloses a PFC circuit for a high input voltage, wherein the PFC (Power Factor Correction) circuit comprises a PFC booster module, a PFC control module and a DC high-voltage output module; the external power supply is boosted by the PFC booster module and then is output by the DC (direct current) high-voltage output module; and the PFC control module controls the PFC booster module to work. The PFC circuit has a simple structure and only one level of booster driving circuit needs to be additionally increased. The PFC circuit has wide application scope and can be applied to all APFC (Active Power Factor Correction). During the application, the PFC circuit for high input voltage is applicable to single-phase electricity or three-phase electricity; and the input voltage ranges from 200Vac to 480Vac.
Description
Technical field
The utility model discloses a kind of pfc circuit, particularly a kind of pfc circuit to high input voltage.
Background technology
Along with the development of Switching Power Supply, the application of Switching Power Supply in people life more and more widely, APFC (Active Power Factor Correction, i.e. APFC) is the switch power supply power factor correcting circuit of using always.At present, conventional APFC chip can only be used to handle the input voltage of 90-264Vac, and when input voltage was high again, withstand voltage (< 900V) of then main Mosfet pipe (being switching tube) chosen with regard to bad with electric current, therefore, can't handle high voltages import.
Summary of the invention
To the above-mentioned APFC of the prior art that mentions can't handle high voltages the problem of input; The utility model provides a kind of new pfc circuit to high input voltage; It adopts two switching tubes to connect; Increase the one-level chip for driving simultaneously, be used to drive two pipes that open the light, the specification of the voltage and current of switching tube is with regard to well chosen like this.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of pfc circuit to high input voltage; Pfc circuit comprises PFC boost module, PFC control module and DC high voltage output module; External power supply boosts through the PFC boost module after the DC high voltage output module is exported, the work of PFC control module control PFC boost module.
The technical scheme that its technical problem that solves the utility model adopts further comprises:
Described PFC boost module comprises switching tube Q3 and the switching tube Q4 that is connected in series; Switching tube Q3 is connected on the dc bus; Switching tube Q4 is through resistance R 12 ground connection; The PFC control module comprises APFC chip U1 and height/low side chip for driving U2; Gate driving pin (GD) the output control signal of APFC chip U1 is given high-side signal input pin (HIN) and the low-side signal input pin (LIN) of height/low side chip for driving U2, and the high-side signal output pin (HO) of height/low side chip for driving U2 and low-side signal output pin (LO) are exported control signal control switch pipe Q3 and switching tube Q4 conducting simultaneously respectively or ended.
The common port of described switching tube Q4 and resistance R 12 is connected to through resistance R 30 on the current detecting pin (CS) of APFC chip U1, and current detecting pin (CS) is through capacitor C 20 ground connection simultaneously.
Described pfc circuit also comprises the high pressure sampling module; The high pressure sampling module is connected on the cathode output end of DC high voltage output module; The cathode output end voltage of sampling DC high voltage output module, and sampled result fed back to the error amplifier inverting input pin (INV) of APFC chip U1.
Described high pressure sampling module comprises resistance R 25, resistance R 24 and the resistance R 26 that is connected in series successively; Resistance R 25 is connected on the cathode output end of DC high voltage output module; Resistance R 26 ground connection, resistance R 24 and the error amplifier inverting input pin (INV) of resistance R 26 common ports output sampled signal to APFC chip U1.
Cross-over connection has the capacitor C 22 and resistance R 31 that is connected in series between the error amplifier inverting input pin (INV) of described APFC chip U1 and the error amplifier output pin (COMP); Simultaneously, go back cross-over connection between the error amplifier inverting input pin (INV) of APFC chip U1 and the error amplifier output pin (COMP) capacitor C 21 is arranged.
Described DC high voltage output module comprises afterflow inductance L 9, rectifier diode D2 and capacitor C 10, and afterflow inductance L 9 is connected in series on the dc bus with rectifier diode D2 successively, and capacitor C 10 is connected across between dc bus and the ground.
The secondary coil of described afterflow inductance L 9 is connected on the zero passage pin (ZCO) of APFC chip U1.
Be in series with resistance R 7, resistance R 27 and resistance R 28 between the prime of described afterflow inductance L 9 and the ground successively; Capacitor C 19 is connected in parallel with resistance R 28, and the common port of resistance R 27 and resistance R 28 is connected on the multiplier input pin (MULT) of APFC chip U1.
Described pfc circuit also comprises AC input module, electromagnetic interface filter, rectification module, and external AC inputs to electromagnetic interface filter behind the AC input module, after electromagnetic interface filter filtering, inputs to rectification module, after the rectification module rectification, inputs to the PFC boost module.
The beneficial effect of the utility model is: the circuit structure in the utility model is simple; Only needing to increase the first class boost drive circuit gets final product; The utility model has wide range of applications, in all APFC, when the utility model is used; Applicable to single-phase electricity or three-phase electricity, input voltage 200-480Vac.
To combine accompanying drawing and embodiment that the utility model is further specified below.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model.
Fig. 2 is the circuit theory diagrams of the utility model.
Embodiment
Present embodiment is the utility model preferred implementation, and other all its principles are identical with present embodiment or approximate with basic structure, all within the utility model protection range.
Please referring to accompanying drawing 1 and accompanying drawing 2; The utility model is a kind of pfc circuit to high input voltage; It mainly comprises PFC boost module, PFC control module and DC high voltage output module; External power supply boosts through the PFC boost module after the DC high voltage output module is exported, the work of PFC control module control PFC boost module.The utility model adopts electric main to supply power, and it also includes AC input module, electromagnetic interface filter and rectification module, in the present embodiment; The AC input module comprises being serially connected in to be imported the protective tube F2 on the live wire and is connected on the thermistor NTC1 on the zero line; In the present embodiment, electromagnetic interface filter comprises inductance L 4, inductance L 6 and the inductance L 7 that is connected on successively on live wire and the zero line, and cross-over connection has capacitor C X1 between live wire between inductance L 4 and the inductance L 6 and the zero line; Cross-over connection has capacitor C X2 between live wire between inductance L 6 and the inductance L 7 and the zero line; Simultaneously, cross-over connection has capacitor C Y1 and the capacitor C Y2 that is connected in series between live wire between inductance L 6 and the inductance L 7 and the zero line, and going back cross-over connection between live wire between inductance L 6 and the inductance L 7 and the zero line has piezo-resistance MOV1; Cross-over connection has piezo-resistance MOV2 between the live wire of inductance L 7 back levels and the zero line; In the present embodiment, the rectifier bridge that rectification module adopts bridge rectifier or diode to be overlapped to form, external AC inputs to electromagnetic interface filter behind the AC input module; After electromagnetic interface filter filtering, input to rectification module, after the rectification module rectification is direct current, input to the PFC boost module.In the present embodiment, export after capacitor C 1, capacitor C 2 and the further rectification of inductance L 8A that connects through " π " type behind the rectification module output electric energy, outlet line is the dc bus of the utility model.In the present embodiment; The PFC boost module comprises switching tube Q3 and the switching tube Q4 that is connected in series, and wherein, switching tube Q3 is connected on the dc bus; Switching tube Q4 is through resistance R 12 ground connection; The common port of switching tube Q4 and resistance R 12 is connected to through resistance R 30 on the current detecting pin (CS) of APFC chip U1, and current detecting pin (CS) is through capacitor C 20 ground connection simultaneously, and resistance R 30 is a switching tube Q4 source current sampling network with capacitor C 20.The PFC control module comprises APFC chip U1 and height/low side chip for driving U2, and gate driving pin (GD) the output control signal of APFC chip U1 is given high-side signal input pin (HIN) and the low-side signal input pin (LIN) of height/low side chip for driving U2.The high-side signal output pin (HO) of height/low side chip for driving U2 and low-side signal output pin (LO) are exported control signal control switch pipe Q3 and switching tube Q4 conducting simultaneously respectively or are ended; In the present embodiment; High-side signal input pin (HIN) and the low-side signal input pin (LIN) of height/low side chip for driving U2 carry out short circuit; Make height/low output driving pulse of height/low side chip for driving U2 keep same-phase to guarantee switching tube Q3 and switching tube Q4 conducting simultaneously, with advancing to end.In the present embodiment; The common port of switching tube Q3 and switching tube Q4 is connected to the high-side signal output ground pin (VS) of height/low side chip for driving U2; Cross-over connection has capacitor C 23 between the high-side signal output ground pin (VS) of height/low side chip for driving U2 and the high-side signal energization pins (VB); Cross-over connection has diode D6 between the high-side signal energization pins (VB) of height/low side chip for driving U2 and the power pins (VCC); Power pins (VCC) is through capacitor C 24 ground connection, and diode D6 and capacitor C 23 are formed bootstrap circuit boost, for height/low side chip for driving U2 drives bias voltage are provided.In the present embodiment, the DC high voltage output module comprises afterflow inductance L 9, rectifier diode D2 and capacitor C 10, and afterflow inductance L 9 is connected in series on the dc bus with rectifier diode D2 successively, and capacitor C 10 is connected across between dc bus and the ground.The secondary coil of afterflow inductance L 9 is connected on the zero passage pin (ZCO) of APFC chip U1 through zero passage resistance R 11, whether is used to detect inductive current to zero point.Resistance R 7, resistance R 27, resistance R 28 and capacitor C 19 are formed input voltage detection circuit; Wherein, Resistance R 7, resistance R 27 and resistance R 28 are connected between dc bus and the ground successively, and capacitor C 19 is connected in parallel with resistance R 28, and the common port of resistance R 27 and resistance R 28 is connected on the multiplier input pin (MULT) of APFC chip U1; Its waveform is a half-sinusoid, is used to detect input voltage.In the present embodiment; Pfc circuit also comprises the high pressure sampling module; The high pressure sampling module comprises resistance R 25, resistance R 24 and the resistance R 26 that is connected in series successively; Resistance R 25 is connected on the cathode output end of DC high voltage output module, resistance R 26 ground connection, resistance R 24 and the error amplifier inverting input pin (INV) of resistance R 26 common ports output sampled signal to APFC chip U1.Cross-over connection has the capacitor C 22 and resistance R 31 that is connected in series between the error amplifier inverting input pin (INV) of APFC chip U1 and the error amplifier output pin (COMP); Simultaneously; Going back cross-over connection between the error amplifier inverting input pin (INV) of APFC chip U1 and the error amplifier output pin (COMP) has capacitor C 21, and capacitor C 21, capacitor C 22 and resistance R 31 constitute the gain compensation networks.
The utility model in use; When the voltage of external power supply AC changes; The input voltage sampling and then changes; The inner reference voltage that produces of APFC chip U1 and then changes and switching tube Q4 drain current and the comprehensive computing of output voltage sampling carrying out, and finally realizes that through changing operating frequency output voltage is constant.
Circuit structure in the utility model is simple, only needs to increase the first class boost drive circuit and gets final product, and the utility model has wide range of applications, in all APFC, and when the utility model is used, applicable to single-phase electricity or three-phase electricity, input voltage 200-480Vac.
Claims (10)
1. pfc circuit to high input voltage; It is characterized in that: described pfc circuit comprises PFC boost module, PFC control module and DC high voltage output module; External power supply boosts through the PFC boost module after the DC high voltage output module is exported, the work of PFC control module control PFC boost module.
2. the pfc circuit to high input voltage according to claim 1; It is characterized in that: described PFC boost module comprises switching tube Q3 and the switching tube Q4 that is connected in series; Switching tube Q3 is connected on the dc bus; Switching tube Q4 is through resistance R 12 ground connection; The PFC control module comprises APFC chip U1 and height/low side chip for driving U2; Gate driving pin (GD) the output control signal of APFC chip U1 is given high-side signal input pin (HIN) and the low-side signal input pin (LIN) of height/low side chip for driving U2, and the high-side signal output pin (HO) of height/low side chip for driving U2 and low-side signal output pin (LO) are exported control signal control switch pipe Q3 and switching tube Q4 conducting simultaneously respectively or ended.
3. the pfc circuit to high input voltage according to claim 2; It is characterized in that: the common port of described switching tube Q4 and resistance R 12 is connected to through resistance R 30 on the current detecting pin (CS) of APFC chip U1, and current detecting pin (CS) is through capacitor C 20 ground connection simultaneously.
4. the pfc circuit to high input voltage according to claim 2; It is characterized in that: described pfc circuit also comprises the high pressure sampling module; The high pressure sampling module is connected on the cathode output end of DC high voltage output module; The cathode output end voltage of sampling DC high voltage output module, and sampled result fed back to the error amplifier inverting input pin (INV) of APFC chip U1.
5. the pfc circuit to high input voltage according to claim 4; It is characterized in that: described high pressure sampling module comprises resistance R 25, resistance R 24 and the resistance R 26 that is connected in series successively; Resistance R 25 is connected on the cathode output end of DC high voltage output module; Resistance R 26 ground connection, resistance R 24 and the error amplifier reversed input pin (INV) of resistance R 26 common ports output sampled signal to APFC chip U1.
6. the pfc circuit to high input voltage according to claim 5; It is characterized in that: cross-over connection has the capacitor C 22 and resistance R 31 that is connected in series between the error amplifier reversed input pin (INV) of described APFC chip U1 and the error amplifier output pin (COMP); Simultaneously, go back cross-over connection between the error amplifier reversed input pin (INV) of APFC chip U1 and the error amplifier output pin (COMP) capacitor C 21 is arranged.
7. the pfc circuit to high input voltage according to claim 2; It is characterized in that: described DC high voltage output module comprises afterflow inductance L 9, rectifier diode D2 and capacitor C 10; Afterflow inductance L 9 is connected in series on the dc bus with rectifier diode D2 successively, and capacitor C 10 is connected across between dc bus and the ground.
8. the pfc circuit to high input voltage according to claim 7, it is characterized in that: the secondary coil of described afterflow inductance L 9 is connected on the zero passage pin (ZCO) of APFC chip U1.
9. the pfc circuit to high input voltage according to claim 7; It is characterized in that: be in series with resistance R 7, resistance R 27 and resistance R 28 between the prime of described afterflow inductance L 9 and the ground successively; Capacitor C 19 is connected in parallel with resistance R 28, and the common port of resistance R 27 and resistance R 28 is connected on the multiplier input pin (MULT) of APFC chip U1.
10. according to any described pfc circuit in the claim 1 to 9 to high input voltage; It is characterized in that: described pfc circuit also comprises AC input module, electromagnetic interface filter, rectification module; External AC inputs to electromagnetic interface filter behind the AC input module; After electromagnetic interface filter filtering, input to rectification module, after the rectification module rectification, input to the PFC boost module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202873061U CN202167984U (en) | 2011-08-09 | 2011-08-09 | PFC (Power Factor Correction) circuit for high input voltage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202873061U CN202167984U (en) | 2011-08-09 | 2011-08-09 | PFC (Power Factor Correction) circuit for high input voltage |
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| Publication Number | Publication Date |
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| CN202167984U true CN202167984U (en) | 2012-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202873061U Expired - Lifetime CN202167984U (en) | 2011-08-09 | 2011-08-09 | PFC (Power Factor Correction) circuit for high input voltage |
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| CN (1) | CN202167984U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100373A (en) * | 2016-07-04 | 2016-11-09 | 南京航空航天大学 | The high frequency CRM boost PFC changer of adaptive optimization THD |
-
2011
- 2011-08-09 CN CN2011202873061U patent/CN202167984U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100373A (en) * | 2016-07-04 | 2016-11-09 | 南京航空航天大学 | The high frequency CRM boost PFC changer of adaptive optimization THD |
| CN106100373B (en) * | 2016-07-04 | 2018-09-25 | 南京航空航天大学 | The high frequency CRM boost PFC converters of adaptive optimization THD |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: MOSO POWER SUPPLY TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHENZHEN MOSO POWER SUPPLY TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Shenzhen Nanshan District City, Guangdong province 518108 industrial park outside the small pine Tai Bai Lu Bai mang mulberry 6 layer Patentee after: MOSO Power Supply Technology Co., Ltd. Address before: Shenzhen Nanshan District City, Guangdong province 518108 industrial park outside the small pine Tai Bai Lu Bai mang mulberry 6 layer Patentee before: Shenzhen MoSo Power Supply Technology Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20120314 |
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| CX01 | Expiry of patent term |