CN103916003A - Common-cathode half-bridge power factor correction circuit - Google Patents
Common-cathode half-bridge power factor correction circuit Download PDFInfo
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- CN103916003A CN103916003A CN201410124400.3A CN201410124400A CN103916003A CN 103916003 A CN103916003 A CN 103916003A CN 201410124400 A CN201410124400 A CN 201410124400A CN 103916003 A CN103916003 A CN 103916003A
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The invention provides a common-cathode half-bridge power factor correction circuit which comprises a first chopping unit and a second chopping unit. The first chopping unit is used for achieving unity power factor single-phase AC-DC conversion in a network voltage positive half cycle and outputting stable direct-current voltages. The second chopping unit is used for achieving unity power factor single-phase AC-DC conversion in a network voltage negative half cycle and outputting stable direct-current voltages. The first chopping unit and the second chopping unit work in a time division mode according to the complete network voltage negative half cycle or network voltage positive half cycle and are used for cooling in the standby process. The common-cathode half-bridge power factor correction circuit can achieve single-phase power factor correction, and has the advantages of being simple in structure, supporting large power output, reducing total cost and the like.
Description
Technical field
The present invention relates to a kind of single-phase power factor correcting device (PFC) of Technics of Power Electronic Conversion technical field, particularly, relate to a kind of common cathode half-bridge power factor correcting circuit.
Background technology
In order to improve the net side power factor that adopts single-phase diode not control the Single-phase AC-DC converters of rectifier bridge, reduce the harm of harmonic current, make it meet the relevant criterion of harmonic current, as IEC61000-3-2, need to adopt single-phase active power factor correction (APFC) technology or single-phase active power factor correction technology.
Aspect circuit topology, single-phase APFC has multiple circuit topology, comprises that traditional single stage has bridge APFC, improves the two-stage of power grade or multistage staggeredly have a bridge APFC, multiple without bridge APFC etc.The operation principle of single-phase APFC is often closely related with circuit topology, and generally speaking, an APFC circuit may have various control strategy, and a control strategy may meet multiple APFC circuit, but can only have independent applicable control strategy for some circuit.
Along with the development of single-phase APFC technology, in applications such as high-power frequency conversion air-conditionings, require the power grade of single-phase APFC increasing, all must adopt at present multistage staggeredly has bridge APFC, otherwise is difficult to solve power device heat dissipation problem and boost inductance at plate installation question and Cost Problems.But the high-power of single-stage APFC design is also comparatively ripe, move comparatively reliably, it is comparatively easy to design, and totally cost is comparatively controlled.Single-phasely also exist inductive current detection difficult without bridge APFC, support the lower problem of power grade.Therefore for current developing stage, in larger through-put power field, single-phase APFC and multistage staggered APFC have obtained application to a certain degree.
Through the retrieval to single-phase APFC circuit, find to mainly contain following representative document:
[1] Wanfeng Zhang, Guang Feng, Yan-Fei Liu and Bin Wu.A Digital Power Factor Correction (PFC) Control Strategy Optimized for DSP.IEEE Transactions ON Power Electronics, Vol.19, No.6, November2004, its technical characteristics of pp.1474-1485. is as follows: adopted traditional single-stage APFC circuit.
[2] Wang Han. the research and implementation of high-power single-phase numeral APFC. the master thesis .2009 of Shanghai Communications University January.Its technical characteristics is as follows: adopted the circuit without bridge APFC.
[3] Lu Fei, Wang Nan, Yang Xijun, Zheng Shuibo, Yin Debin. the simulation analysis of the staggered power factor corrector of single-phase three multiplication of voltages. 3 phases of electric automatization .2013. its technical characteristics is as follows: adopted the three multiplication of voltages APFC circuit that interlocks.
More than comprehensive, the retrieval of single-phase active power factor corrector available circuit structure and control thereof is found, current stage need to be released a kind of between single-phase APFC, without a kind of new APFC circuit and control thereof between bridge APFC and multistage staggered APFC, has outstanding overall target aspect design aspect, cost.
Summary of the invention
For defect of the prior art, the object of this invention is to provide a kind of common cathode half-bridge power factor correcting circuit, the AC-DC conversion of this circuit unit of realization input power factor, supports relatively high power output, has the advantages such as circuit is simple, control is convenient simultaneously.
For realizing above object, the invention provides a kind of common cathode half-bridge power factor correcting circuit, comprise the first copped wave unit and the second copped wave unit, wherein: described the first copped wave unit is in order to complete the single-phase AC-DC conversion of unity power factor in the positive half cycle of line voltage, and the direct voltage of stable output; Described the second copped wave unit is in order to complete the single-phase AC-DC conversion of unity power factor in line voltage negative half period, and the direct voltage of stable output; The first copped wave unit and the second copped wave unit a preparation and a use operating time are half complete power cycle, i.e. positive half cycle or negative half period, while work for heat radiation;
Described the first copped wave unit and described the second copped wave unit comprise the public filter inductance that is parallel to single-phase electrical network, filter capacitor, boost inductance, shunt resistance and are parallel to the electrochemical capacitor of DC output end, described the first copped wave unit also comprises the first conventional diode, the first fast recovery diode and the first power switch, the second copped wave unit also comprises the second conventional diode, the second fast recovery diode and the second power switch, thereby forms an indivisible converters; Wherein:
One end of described filter inductance is connected with the live wire of single phase alternating current power supply, the other end is connected with one end of boost inductance and filter capacitor, the other end of boost inductance is connected with the anode of the first fast recovery diode, the negative electrode of the second conventional diode, the emitter of the second power switch, forms common point ACL; The other end of filter capacitor is connected with the anode of the zero line of single phase alternating current power supply, the second fast recovery diode, the negative electrode of the first conventional diode, the emitter of the first power switch, forms common point ACN;
After being connected with the negative electrode of the second fast recovery diode, the negative electrode of described the first fast recovery diode is connected with one end of shunt resistance, the other end of shunt resistance is connected with the collector electrode of the first power switch, the collector electrode of the second power switch, the positive pole of electrochemical capacitor, forms direct current output cathode DCP; After the anode of the first conventional diode, the anodic bonding of the second conventional diode, form direct current output negative pole DCN.
Preferably, the first power switch in described the first copped wave unit and described the second copped wave unit, the gate pole of the second power switch are accepted respectively the driving pulse from control circuit, copped wave work in the positive half cycle of line voltage, negative half period respectively, obtain unity power factor in net side, obtaining galvanic current at output presses, for rear class load supplying, complete single-phase power factor correcting.
Compared with prior art, the present invention has following beneficial effect:
(1) circuit structure is simple, use number of devices is few, shunt resistance of two copped wave units shareds, can adopt conventional output dc voltage testing circuit, inductive current detection circuit and grid ac voltage testing circuit, two power switchs can share same driver, further simplify power circuit design and reduce costs;
(2) supply voltage negative half period, the first copped wave unit carries out copped wave work, the unit's of realization net side power factor and stable DC output voltage, the second cooling standby in copped wave unit; The positive half cycle of supply voltage, the second copped wave unit carries out copped wave work, the unit's of realization net side power factor and stable DC output voltage, the first cooling standby in copped wave unit; Thereby can support larger power stage;
(3) filter inductance, filter capacitor, boost inductance can form LCL filter, equivalence increases the impedance of net side, makes the capacity current of filter capacitor lower and improve current on line side waveform, thereby reduces the size of filter capacitor, adopt AC boosting inductance, reduced the design difficulty of inductance.
Accompanying drawing explanation
By reading the detailed description of non-limiting example being done with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is the circuit theory diagrams of the embodiment of the present invention 1.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art further to understand the present invention, but not limit in any form the present invention.It should be pointed out that to those skilled in 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.
As shown in Figure 1, the present embodiment provides a kind of common cathode half-bridge power factor correcting circuit, comprise the first copped wave unit and the second copped wave unit, wherein: described the first copped wave unit is in order to complete the single-phase AC-DC conversion of unity power factor in line voltage negative half period, and the direct voltage of stable output; Described the second copped wave unit is in order to complete the single-phase AC-DC conversion of unity power factor in the positive half cycle of line voltage, and the direct voltage of stable output; The first copped wave unit and the second copped wave unit a preparation and a use, the operating time is half complete power cycle (positive half cycle or negative half period), while work, for heat radiation, can support larger power stage.
In the present embodiment, described the first copped wave unit and described the second copped wave unit comprise a public filter inductance L1 who is parallel to single-phase electrical network, a filter capacitor C1, a boost inductance L2, shunt resistance R1 and be parallel to an electrochemical capacitor E1 of output, described the first copped wave unit also comprises the first conventional diode D1, the first fast recovery diode FRD1 and the first power switch S1, described the second copped wave unit also comprises the second conventional diode D2, the second fast recovery diode FRD2 and the second power switch S2, thereby form an indivisible converters, wherein:
One end of described filter inductance L1 is connected with the live wire of single phase alternating current power supply, the other end is connected with one end of filter capacitor C1 with boost inductance L2, the other end of boost inductance L2 is connected with the anode of the first fast recovery diode FRD1, the negative electrode of the second conventional diode D2, the emitter of the second power switch S2, forms common point ACL; The other end of filter capacitor C1 is connected with the anode of the zero line of single phase alternating current power supply, the second fast recovery diode FRD2, the negative electrode of the first conventional diode D1, the emitter of the first power switch S1, forms common point ACN;
After being connected with the negative electrode of the second fast recovery diode FRD2, the negative electrode of described the first fast recovery diode FRD1 is connected with one end of shunt resistance R1, the other end of shunt resistance R1 is connected with the collector electrode of the first power switch S1, the collector electrode of the second power switch S2, the positive pole of electrochemical capacitor E1, forms direct current output cathode DCP; After the anode of the first conventional diode D1, the anodic bonding of the second conventional diode D2, form direct current output negative pole DCN.
The first power switch described in the present embodiment in the first copped wave unit and described the second copped wave unit, the gate pole of the second power switch are accepted respectively the driving pulse from control circuit, copped wave work in the positive half cycle of line voltage, negative half period respectively, obtain unity power factor in net side, obtaining galvanic current at output presses, for rear class load supplying, complete single-phase power factor correcting.
Described in the present embodiment, circuit specific works principle is as follows:
At the positive half cycle of single-phase line voltage, described the first copped wave cell operation, realizes power factor correction, described the second copped wave unit standby; In the time of the first power switch S1 conducting, filter circuit, boost inductance L2, the first fast recovery diode FRD1, shunt resistance R1, the first power switch S1 by AC power, filter inductance L1 and filter capacitor C1 form loop, filter capacitor C1 both end voltage near sinusoidal half-wave voltage, boost inductance L2 storage power; In the time that the first power switch S1 turn-offs, filter circuit, boost inductance L2, the first fast recovery diode FRD1, shunt resistance R1, electrochemical capacitor E1, the first conventional diode D1 by AC power, filter inductance L1 and filter capacitor C1 form afterflow path, filter capacitor C1 both end voltage near sinusoidal half-wave voltage, boost inductance L2 releases energy; The filter action of turn-offing rule and filter inductance L1, filter capacitor C1 by control circuit control the first power switch S1 conducting wish, can obtain galvanic current and press and net side unity power factor.
At single-phase electrical network voltage negative half cycle, described the second copped wave cell operation, realizes power factor correction, described the first copped wave unit standby; In the time of the second power switch S2 conducting, filter circuit, AC power, the second fast recovery diode FRD2, shunt resistance R1, the second power switch S2 by boost inductance L2, filter inductance L1 and filter capacitor C1 form loop, filter capacitor C1 both end voltage near sinusoidal half-wave voltage, boost inductance L2 storage power; In the time that the second power switch S2 turn-offs, filter circuit, AC power, the second fast recovery diode FRD2, shunt resistance R1, electrochemical capacitor E1, the second conventional diode D2 by boost inductance L2, filter inductance L1 and filter capacitor C1 form afterflow path, filter capacitor C1 both end voltage near sinusoidal half-wave voltage, boost inductance L2 releases energy; The filter action of turn-offing rule and filter inductance L1, filter capacitor C1 by control circuit control the second power switch S2 conducting wish, can obtain galvanic current and press and net side unity power factor.
In this example:
AC-input voltage wide region, 85VAC-264VAC, power frequency, specified input voltage 220VAC, specified output dc voltage mean value dynamically exceeds 20VDC than net pressure amplitude value, and ripple voltage peak-to-peak value is controlled in 10V, more than rated output power reaches 2.5kW;
Switching frequency: 35kHz-40kHz;
Filter inductance (L1): 100 μ H, plug-in unit, installs at plate;
Filter capacitor (C1): 275V, 1.0 μ F-2.2 μ F, plug-in unit;
Boost inductance (L2): 500 μ H, plug-in unit, installs at plate;
First, second conventional diode (D1, D2): 600V, 50/100 ℃, flat bridge, plug-in unit;
First, second fast recovery diode (FRD1, FRD2): 600V, 50A/100 ℃, is less than 20ns recovery time;
First, second power switch (S1, S2): 600V, 100A/100 ℃, IGBT fast, containing anti-paralleled diode;
Electrochemical capacitor (E1): 6x680 μ F, parallel connection, 400WV;
Shunt resistance (R1): 10m Ω-15m Ω, 5W, cement noninductive resistance.
The present invention can realize single-phase power factor correcting, have circuit structure simple, use number of devices few, simplify power circuit design and reduce costs; Realize the AC-DC conversion of unit input power factor, supported relatively high power output; Filter inductance, filter capacitor, boost inductance can form LCL filter, equivalence increases the impedance of net side, makes the capacity current of filter capacitor lower and improve current on line side waveform, reduces the size of filter capacitor, adopt AC boosting inductance, reduced the design difficulty of inductance.
Above specific embodiments of the invention are described.It will be appreciated that, the present invention is not limited to above-mentioned specific implementations, and those skilled in the art can make various distortion or modification within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (4)
1. a common cathode half-bridge power factor correcting circuit, it is characterized in that, comprise the first copped wave unit and the second copped wave unit, wherein: described the first copped wave unit is in order to complete the single-phase AC-DC conversion of unity power factor in the positive half cycle of line voltage, and the direct voltage of stable output; Described the second copped wave unit is in order to complete the single-phase AC-DC conversion of unity power factor in line voltage negative half period, and the direct voltage of stable output; The first copped wave unit and the second copped wave unit a preparation and a use, the operating time is half complete power cycle, i.e. positive half cycle or negative half period, while work for heat radiation;
Described the first copped wave unit and described the second copped wave unit comprise the public filter inductance that is parallel to single-phase electrical network, filter capacitor, boost inductance, shunt resistance and are parallel to the electrochemical capacitor of DC output end, described the first copped wave unit also comprises the first conventional diode, the first fast recovery diode and the first power switch, the second copped wave unit also comprises the second conventional diode, the second fast recovery diode and the second power switch, thereby forms an indivisible converters; Wherein:
One end of described filter inductance is connected with the live wire of single phase alternating current power supply, the other end is connected with one end of boost inductance and filter capacitor, the other end of boost inductance is connected with the anode of the first fast recovery diode, the negative electrode of the second conventional diode, the emitter of the second power switch, forms common point ACL; The other end of filter capacitor is connected with the anode of the zero line of single phase alternating current power supply, the second fast recovery diode, the negative electrode of the first conventional diode, the emitter of the first power switch, forms common point ACN;
After being connected with the negative electrode of the second fast recovery diode, the negative electrode of described the first fast recovery diode is connected with one end of shunt resistance, the other end of shunt resistance is connected with the collector electrode of the first power switch, the collector electrode of the second power switch, the positive pole of electrochemical capacitor, forms direct current output cathode DCP; After the anode of the first conventional diode, the anodic bonding of the second conventional diode, form direct current output negative pole DCN.
2. a kind of common cathode half-bridge power factor correcting circuit according to claim 1, it is characterized in that, the first power switch in described the first copped wave unit and described the second copped wave unit, the gate pole of the second power switch are accepted respectively the driving pulse from control circuit, copped wave work in the positive half cycle of line voltage, negative half period respectively, obtain unity power factor in net side, obtain galvanic current at output and press, for rear class load supplying, complete single-phase power factor correcting.
3. a kind of common cathode half-bridge power factor correcting circuit according to claim 1 and 2, is characterized in that, at the positive half cycle of single-phase line voltage, described the first copped wave cell operation, realizes power factor correction, described the second copped wave unit standby; In the time of the first power switch conducting, by filter circuit, boost inductance, first fast two utmost points, shunt resistance, the first power switch formation loop of recovering of AC power, filter inductance and filter capacitor, filter capacitor both end voltage near sinusoidal half-wave voltage, boost inductance storage power; In the time that the first power switch turn-offs, filter circuit, boost inductance, the first fast recovery diode, shunt resistance, electrochemical capacitor, the first conventional diode by AC power, filter inductance and filter capacitor form afterflow path, filter capacitor both end voltage near sinusoidal half-wave voltage, boost inductance releases energy; The filter action of turn-offing rule and filter inductance, filter capacitor by control circuit control the first power switch conducting wish, obtains galvanic current and presses and net side unity power factor.
4. a kind of common cathode half-bridge power factor correcting circuit according to claim 1 and 2, is characterized in that, at single-phase electrical network voltage negative half cycle, described the second copped wave cell operation, realizes power factor correction, described the first copped wave unit standby; In the time of the second power switch conducting, filter circuit, AC power, the second fast recovery diode, shunt resistance, the second power switch by boost inductance, filter inductance and filter capacitor form loop, filter capacitor both end voltage near sinusoidal half-wave voltage, boost inductance storage power; In the time that the second power switch turn-offs, filter circuit, AC power, the second fast recovery diode, shunt resistance, electrochemical capacitor, the second conventional diode by boost inductance, filter inductance and filter capacitor form afterflow path, filter capacitor both end voltage near sinusoidal half-wave voltage, boost inductance releases energy; The filter action of turn-offing rule and filter inductance, filter capacitor by control circuit control the second power switch conducting wish, obtains galvanic current and presses and net side unity power factor.
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| CN201410124400.3A CN103916003A (en) | 2014-03-28 | 2014-03-28 | Common-cathode half-bridge power factor correction circuit |
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| CN201410124400.3A CN103916003A (en) | 2014-03-28 | 2014-03-28 | Common-cathode half-bridge power factor correction circuit |
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| CN103916003A true CN103916003A (en) | 2014-07-09 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6411535B1 (en) * | 2001-03-29 | 2002-06-25 | Emc Corporation | Power factor correction circuit with integral bridge function |
| CN101151791A (en) * | 2005-03-31 | 2008-03-26 | 国际整流器公司 | Bridgeless boost converter with PFC circuit |
| CN201436615U (en) * | 2009-04-28 | 2010-04-07 | 珠海格力电器股份有限公司 | A uniphase non-bridge power factor correcting circuit |
| CN102246405A (en) * | 2008-08-20 | 2011-11-16 | 电方便有限公司 | Generalized AC-DC synchronous rectification techniques for single- and multi-phase systems |
| CN103219877A (en) * | 2012-01-20 | 2013-07-24 | 台达电子企业管理（上海）有限公司 | Capacitor discharging circuit and converter |
| US20130249504A1 (en) * | 2012-03-25 | 2013-09-26 | Niko Semiconductor Co., Ltd. | Power factor correction (pfc) controller and bridgeless pfc circuit with the same |
-
2014
- 2014-03-28 CN CN201410124400.3A patent/CN103916003A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6411535B1 (en) * | 2001-03-29 | 2002-06-25 | Emc Corporation | Power factor correction circuit with integral bridge function |
| CN101151791A (en) * | 2005-03-31 | 2008-03-26 | 国际整流器公司 | Bridgeless boost converter with PFC circuit |
| CN102246405A (en) * | 2008-08-20 | 2011-11-16 | 电方便有限公司 | Generalized AC-DC synchronous rectification techniques for single- and multi-phase systems |
| CN201436615U (en) * | 2009-04-28 | 2010-04-07 | 珠海格力电器股份有限公司 | A uniphase non-bridge power factor correcting circuit |
| CN103219877A (en) * | 2012-01-20 | 2013-07-24 | 台达电子企业管理（上海）有限公司 | Capacitor discharging circuit and converter |
| US20130249504A1 (en) * | 2012-03-25 | 2013-09-26 | Niko Semiconductor Co., Ltd. | Power factor correction (pfc) controller and bridgeless pfc circuit with the same |
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