CN1540848A - Circuit providing output in three electrical levels for correcting two-phase power factor - Google Patents
Circuit providing output in three electrical levels for correcting two-phase power factor Download PDFInfo
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- CN1540848A CN1540848A CNA031132766A CN03113276A CN1540848A CN 1540848 A CN1540848 A CN 1540848A CN A031132766 A CNA031132766 A CN A031132766A CN 03113276 A CN03113276 A CN 03113276A CN 1540848 A CN1540848 A CN 1540848A
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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
Abstract
The disclosed correcting circuit and control device possesses features of small size and weight, low complex degree, excellent performance index being suitable to larger power. Circuit providing output in three electrical levels for correcting three-phase power factor includes: triphase rectification bridge VD3, power switch 'VT3, VT4, VT5, VT6', voltage boosting main tube 'VTl, VT2' voltage boosting diodes 'VDl, VD2' etc. Controlling device includes signal sempling unt, logic synthesis unit, core control unit and drive unit.
Description
Technical field
The present invention relates to a kind of civil power input power factor correcting circuit and device, more particularly relate to a kind of three-phase power factor correcting circuit and control device thereof.
Background technology
Publication number is CN1233104, and invention and created name discloses a kind of correcting circuit of three-phase activity coefficient for the application case of " single-switch triphase power factor correcting method and circuit ".This circuit is at electronic switch of output two ends cross-over connection of rectification circuit, and this switch is connected with a pulse control signal.Because circuit has only a switching tube, make the control strategy complexity, stresses of parts is big, is not suitable for middle large-power occasions.
Summary of the invention
The present invention is in order to overcome weak point of the prior art, to provide a kind of and be applicable to that than large-power occasions, complexity is low, the three-phase power factor correcting circuit and the device of the three level output of superior performance.
It is achieved through the following technical solutions: a kind of three-phase power factor correcting circuit of three level output, and civil power input live wire is connected with three-phase commutation bridge VD3 input; The positive output end of three-phase commutation bridge VD3 is connected with the A utmost point of the 3rd power switch VT3; The K utmost point of the 3rd power switch VT3 is connected with an end of first inductance; The other end of first inductance L 1 is connected with the C utmost point of the first power switch VT1 and the A utmost point of the first diode VD1 respectively; The K utmost point of first diode is connected with the positive pole of first capacitor C 1, as positive output end; The civil power zero line is connected with the E utmost point of the first power switch VT1 and the negative pole of described first capacitor C 1 respectively, and the zero line of civil power input extends through output from input always;
The negative output terminal of three-phase commutation bridge is connected with the K utmost point of the 4th power switch VT4; The A utmost point of the 4th power switch VT4 is connected with an end of second inductance L 2; The other end of second inductance L 2 is connected with the E utmost point of the second power switch VT2 and the K utmost point of the second diode VD2 respectively; The A utmost point of the second diode VD2 is connected with the negative pole of second capacitor C 2, as negative output terminal; The civil power zero line is connected with the C utmost point of the described second power switch VT2 and the positive pole of second capacitor C 2 respectively.
In addition, input characteristics requirement according to uninterrupted power supply UPS, same set of power of dual-purpose and control circuit reached the output voltage corrective action when battery was imported, make positive and negative BUS voltage still keep same steady state value, can add battery pack, the positive pole of the first battery pack BATTERY1 is connected with the A utmost point of the 5th power switch VT5, and the K utmost point of the 5th power switch VT5 is connected with an end of the K utmost point of the 3rd power switch and first inductance; Negative pole is connected with zero line; The positive pole of the second battery pack BATTERY2 is connected with zero line, and negative pole is connected with the K utmost point of the 6th power switch VT6, and the A utmost point of the 6th power switch VT6 is connected with an end of the A utmost point of the 4th power switch and second inductance;
A kind of control device of three-phase power factor correcting circuit of three level output, comprise the signal sampling part, the logic synthesis part, core control section and drive part, the core control section comprises the special-purpose integrated control chip of power factor correction, the Voltage loop feedback, the electric current loop feedback, the driving pulse synthesizer, wherein the special-purpose integrated control chip of power factor correction is UC3854, the Voltage loop feedback is in order to realize the output voltage voltage stabilizing, electric current loop is followed input voltage waveform and is changed in order to realize input current waveform, be the input power factor of Adjustment System, final system forms two-tube two-way pwm control signal up and down by the driving pulse synthesizer; Signal sampling partly comprises positive and negative BUS voltage sample, the sampling of inductance input terminal voltage, inductive current sampling, and positive and negative BUS voltage sample is in order to form Voltage loop, and the inductance input terminal voltage forms the Voltage loop feedforward, and the inductive current sampling is in order to form electric current loop; Logic synthesis comprises that partly synchronous control signal (SYNC), the system of system open signal (ENABLE), system protection signal (PROTECT), the system synchronization control signal is as the initial reset signal of the clock of control chip, in order to the PWM drive control signal is carried out synchronous triggering, control is two power switch conductings simultaneously up and down, system opens the control enable signal of signal as control chip, in addition when the overcurrent-overvoltage situation takes place, the system protection signal can the shielding harness control signal be exported, and plays the protective effect of system; Drive part comprises light-coupled isolation, drive circuit, and the control signal of system is at first realized buffer action by optocoupler, by drive circuit power device is directly driven again.
The present invention is fit to than large-power occasions, and volume weight is little, and complexity is low, and performance index are excellent.
Description of drawings
Fig. 1 is the three-phase voltage increasing circuit of power factor correction of three level output;
Fig. 2 is the control circuit block diagram of Fig. 1 circuit;
Fig. 3 is the detailed control principle figure of Fig. 2 core control circuit.
Embodiment
Fig. 1 is the three-phase power factor correcting circuit that three level proposed by the invention are exported, and VT3, VT4 generally select power scr, and also the available horsepower relay substitutes; VT1, VT2 generally select power field effect pipe or igbt; VD1, VD2 are the Ultrafast recovery power diode; VT5, VT6 generally select power scr, and also the available horsepower relay substitutes.Its annexation is: civil power is input as three-phase four-wire system, is designated as A, B, C, N; A, B, C connect three-phase commutation bridge VD3 input, and REC+, REC-are the positive and negative of three-phase commutation bridge output; REC+ connects the A utmost point of device for power switching VT3, the K utmost point of VT3 connects the end of boost inductance L1, is designated as CHK+, another termination of boost inductance L1 boost the C utmost point of being responsible for VT1 and the A utmost point of booster diode VD1, the K utmost point of VD1 connects the positive pole of dc bus electrochemical capacitor C1, be designated as BUS+, the E utmost point of VT1 and the negative pole of C1 meet civil power input zero line N, then rectifier bridge VD3, L1, VT1, VD1, C1 have formed a positive Boost circuit; REC-connects the K utmost point of VT4, the A utmost point of VT4 connects the end of boost inductance L2, is designated as CHK-, the E utmost point of another termination VT2 of L2 and the K utmost point of VD2, the A utmost point of VD2 connects the negative pole of C2, be designated as BUS-, the C utmost point of VT2 and the positive pole of C2 meet N, then rectifier bridge VD3, L2, VT2, VD2, C2 have formed a negative Boost circuit.In addition, can insert one group of positive battery group branch road between CHK+ and N, the negative terminal of the first battery pack BATTERY1 meets N, the positive termination VT5A utmost point, and the K utmost point of VT5 meets CHK+; Insert negative battery group branch road between CHK-and N, the positive termination N of the second battery pack BATTERY2, negative terminal connect the K utmost point of VT6, and the A utmost point of VT6 meets CHK-.BUS+, N, BUS-have formed the three level output of circuit.
Narrate respectively below this circuit when three-phase mains input service and two Battery packs boost work characteristics and to the requirement of control circuit: owing to there is civil power zero line N to insert, positive and negative Boost circuit is mutual decoupling zero, the work of positive Boost circuit is only relevant with the switch of VT1, the work of negative Boost circuit is only relevant with the switch of VT2, therefore, during the civil power input service, VT3, the VT4 conducting, VT5, VT6 ends, and control VT1 switch makes positive Boost circuit working, export stable BUS+, and make the current waveform on the inductance L 1 follow the tracks of the CHK+ voltage waveform; Control VT2 switch makes negative Boost circuit working, exports stable BUS-, and makes the current waveform on the inductance L 2 follow the tracks of the CHK-voltage waveform; Work like this, can make every phase mains current in each 60 degree scope of peak value both sides, follow the tracks of line voltage, and be 0 in other scope, such civil power in theory the PF value greater than 0.95, THD is less than 30%, so this circuit has three-phase mains input PFC function, the traditional relatively three-phase of circuit is the simple more actual effect of APFC independently, and performance index obviously are better than the passive filtering method simultaneously.When battery boosts work, VT3, VT4 ends, VT5, the VT6 conducting, positive and negative Boost circuit is controlled boosting of positive and negative battery pack respectively.
VT3 is described below, and the function of VT4 is during the civil power input service, VT3, the VT4 conducting, late-class circuit is worked by the BoostPFC mode, but when civil power is a high pressure, even the civil power peak value is when being higher than the BUS magnitude of voltage, and the condition of work of Boost pfc circuit is unappeasable, at this moment, if do not handled, will inevitably make VT1, the switch work of VT2 is undesired, thereby cause L1, the current oscillation on the L2 sends very big noise.The method that we can take has following two kinds, and the one, turn-off VT3, VT4, conducting VT5, VT6 allow system change the battery work of boosting over to, but we always wishes to widen the working range of civil power as far as possible, reduce the number of times of battery discharge, thereby prolong the useful life of battery, at this moment, can be to VT3, VT4 carries out phased, avoid importing civil power peak value higher point, only satisfy the section conducting VT3 of Boost pfc circuit, VT4 at the instantaneous voltage of civil power, or shutoff VT1, VT2, only to VT3, VT4 carries out phased, make BUS voltage stable, do not do requirement to system's input PFC index this moment.Above control method can be expanded the working range of civil power toward high pressure section.
The control device of the three-phase power factor correcting circuit of three level output as shown in Figure 2, comprises signal sampling part 101, logic synthesis part 102, core control section 103 and drive part 104.The core control section comprises the special-purpose integrated control chip of power factor correction, Voltage loop feedback, electric current loop feedback, driving pulse synthesizer; The core control section can adopt the PFC special chip UC3854 and the peripheral circuit thereof of Unitrode company to finish.Signal sampling partly comprises positive and negative BUS voltage sample, the sampling of inductance input terminal voltage, the sampling of inductance input current; Logic synthesis comprises that partly synchronous control signal (SYNC), the system of system open signal (ENABLE), system protection signal (PROTECT); Drive part comprises light-coupled isolation, drive circuit.
Fig. 3 is three-phase activity coefficient adjustment control central principle figure, at first with DC bus-bar voltage (+DCBUS ,-DCBUS) sample, with this as the given magnitude references of electric current loop, equate with given by the big young pathbreaker of Voltage loop closed-loop adjustment output dc voltage, reach output dc voltage voltage stabilizing designing requirement; (VCHK+, VCHK-) samples with the inductance input terminal voltage, on the one hand as the dynamic response process of input voltage feed forward link with the raising system; As the waveform standard of inductance input current signal, can obtain the reference waveform (Imo+, Imo-) of input current so on the other hand.Inductive current ichk+, ichk-are sampled, compare, form electric current loop with current waveform is given; Positive and negative BUS voltage given as Voltage loop of sampling simultaneously compares the back with default BUS magnitude of voltage and forms Voltage loop; After special integrated chip passes through peripheral Voltage loop, electric current loop regulating circuit, modulate by Average Current Control PWM in inside, thus synthetic driving pulse, final drive signal as the first power switch VT1 and the second power switch VT2.
Claims (8)
1. the three-phase power factor correcting circuit of a level output is characterized in that,
Civil power input live wire is connected with the three-phase commutation bridge input; The positive output end of described three-phase commutation bridge is connected with the A utmost point of the 3rd power switch; The K utmost point of described the 3rd power switch is connected with an end of first inductance; The other end of described first inductance is connected with the C utmost point of first power switch and the A utmost point of first diode respectively; The K utmost point of described first diode is connected with the positive pole of first electric capacity, as positive output end; The civil power zero line is connected with the E utmost point of first power switch and the negative pole of described first electric capacity respectively, and the zero line of described civil power input extends through output from input always;
The negative output terminal of described three-phase commutation bridge is connected with the K utmost point of the 4th power switch; The A utmost point of described the 4th power switch is connected with an end of second inductance; The other end of described second inductance is connected with the E utmost point of second power switch and the K utmost point of second diode respectively; The A utmost point of described second diode is connected with the negative pole of second electric capacity, as negative output terminal; Described civil power zero line is connected with the C utmost point of described second power switch and the positive pole of second electric capacity respectively.
2. the three-phase power factor correcting circuit of three level output according to claim 1 is characterized in that described the 3rd power switch and the 4th power switch are power scr or power relay.
3. the three-phase power factor correcting circuit of three level output according to claim 1 is characterized in that described first and second power switchs are power field effect pipe or igbt.
4. the three-phase power factor correcting circuit of three level output according to claim 1 is characterized in that described first and second diodes are the Ultrafast recovery power diode.
5. the three-phase power factor correcting circuit of three level output according to claim 1, it is characterized in that, the K utmost point of described the 3rd power switch is connected with the K utmost point of the 5th power switch, the A utmost point of described the 5th power switch is connected with the positive pole of first battery pack, the negative pole of described first battery pack is connected with the E utmost point of first power switch, the negative pole of first electric capacity respectively, constitutes the end over the ground of positive BUS output;
The A utmost point of described the 4th power switch is connected with the A utmost point of the 6th power switch, the K utmost point of described the 6th power switch is connected with the negative pole of second battery pack, the positive pole of described second battery pack is connected with the C utmost point of second power switch, the positive pole of second electric capacity respectively, constitutes the end over the ground of negative BUS output.
6. the three-phase power factor correcting circuit of three level output according to claim 5 is characterized in that described the 5th power switch and the 6th power switch are power scr or power relay.
7. the control device of the three-phase power factor correcting circuit of level output, comprise signal sampling part, logic synthesis part, core control section and drive part, it is characterized in that, described core control section comprises the integrated control chip of power factor correction special use, in order to the Voltage loop feedback of realization system output voltage stabilizing, in order to the electric current loop feedback of the high input power factor of realization system, and in order to form the driving pulse synthesizer of two-tube pwm control signal; Described signal sampling part is sampled to input port voltage CHK+, the CHK-of first inductance and second inductance, on the one hand as the dynamic response process of input voltage feed forward link with the raising system; Input current waveform as electric current loop is given on the other hand; And inductive current ichk+, ichk-are sampled, compare with current waveform is given, form electric current loop; Positive and negative BUS voltage given as Voltage loop of sampling simultaneously compares the back with default BUS magnitude of voltage and forms Voltage loop; After special integrated chip passes through peripheral Voltage loop, electric current loop regulating circuit, modulate by Average Current Control PWM in inside, thus synthetic driving pulse, final drive signal as the first power switch VT1 and the second power switch VT2.
8. the control device of the three-phase power factor correcting circuit of three level output according to claim 7, it is characterized in that described logic synthesis partly comprises the system protection signal of opening signal, playing a protective role when the faults such as overcurrent-overvoltage in order to the synchronous control signal of controlling two-tube while conducting, in order to the system of control system output enable work; Described synchronous control signal is as the initial reset signal of the clock of control chip, and in order to the PWM drive signal of first power switch and second power switch is carried out synchronous triggering, it is synchronous to reach two power switch turn-on action; The described control enable signal of opening signal as control chip, shutoff is opened in control PWM work; Described guard signal and PWM drive signal carry out logic with, when the overcurrent-overvoltage fault occurring, system mask PWM drives output, plays the protective effect of system.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB031132766A CN100379130C (en) | 2003-04-22 | 2003-04-22 | Circuit providing output in three electrical levels for correcting two-phase power factor |
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| CNB031132766A CN100379130C (en) | 2003-04-22 | 2003-04-22 | Circuit providing output in three electrical levels for correcting two-phase power factor |
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| CN100379130C CN100379130C (en) | 2008-04-02 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100433513C (en) * | 2005-01-26 | 2008-11-12 | 中兴通讯股份有限公司 | Method for controlling power-factor correct circuit |
| CN101764529A (en) * | 2010-04-02 | 2010-06-30 | 天津大学 | Method for restricting midpoint potential drifting of three-level inverter in direct drive wind power system |
| CN101789688A (en) * | 2010-04-02 | 2010-07-28 | 天津大学 | Value selecting method for boost inductance of three-level Boost converter |
| CN101741235B (en) * | 2009-12-29 | 2011-12-14 | 重庆大学 | Buck three-phase power factor corrector with controlled output voltage |
| CN101540507B (en) * | 2008-03-21 | 2012-05-02 | 力博特公司 | Compensating three-phase active power factor correcting circuit |
| CN101752880B (en) * | 2008-12-04 | 2012-08-22 | 台达电子工业股份有限公司 | Uninterruptible power supply provider |
| CN102916581A (en) * | 2012-11-16 | 2013-02-06 | 特变电工新疆新能源股份有限公司 | Frequency multiplier type booster circuit, control method and inverter thereof |
| CN103825454A (en) * | 2013-12-17 | 2014-05-28 | 中国船舶重工集团公司第七一九研究所 | Three-level DC converter apparatus and electric energy conversion method employing same |
| CN104065276A (en) * | 2014-06-27 | 2014-09-24 | 华为技术有限公司 | Method and apparatus for controlling three-phase uninterrupted power supply and three-phase uninterrupted power supply |
| CN107769538A (en) * | 2017-12-07 | 2018-03-06 | 深圳市华星光电技术有限公司 | Power factor correction circuit and circuit of reversed excitation |
| CN109995229A (en) * | 2018-01-02 | 2019-07-09 | 台达电子企业管理（上海）有限公司 | Pfc circuit |
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| US6069412A (en) * | 1993-03-29 | 2000-05-30 | Powerware Corporation | Power factor corrected UPS with improved connection of battery to neutral |
| JP3151131B2 (en) * | 1995-08-11 | 2001-04-03 | デンセイ・ラムダ株式会社 | Input power circuit of half-bridge type inverter |
| JPH11299243A (en) * | 1998-04-15 | 1999-10-29 | Hitachi Ltd | Power converting apparatus with no higher-harmonics |
| US6026006A (en) * | 1998-09-21 | 2000-02-15 | Lucent Technologies Inc. | Integrated three-phase power converter and method of operation thereof |
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2003
- 2003-04-22 CN CNB031132766A patent/CN100379130C/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100433513C (en) * | 2005-01-26 | 2008-11-12 | 中兴通讯股份有限公司 | Method for controlling power-factor correct circuit |
| CN101540507B (en) * | 2008-03-21 | 2012-05-02 | 力博特公司 | Compensating three-phase active power factor correcting circuit |
| CN101752880B (en) * | 2008-12-04 | 2012-08-22 | 台达电子工业股份有限公司 | Uninterruptible power supply provider |
| CN101741235B (en) * | 2009-12-29 | 2011-12-14 | 重庆大学 | Buck three-phase power factor corrector with controlled output voltage |
| CN101764529A (en) * | 2010-04-02 | 2010-06-30 | 天津大学 | Method for restricting midpoint potential drifting of three-level inverter in direct drive wind power system |
| CN101789688A (en) * | 2010-04-02 | 2010-07-28 | 天津大学 | Value selecting method for boost inductance of three-level Boost converter |
| CN102916581A (en) * | 2012-11-16 | 2013-02-06 | 特变电工新疆新能源股份有限公司 | Frequency multiplier type booster circuit, control method and inverter thereof |
| CN103825454A (en) * | 2013-12-17 | 2014-05-28 | 中国船舶重工集团公司第七一九研究所 | Three-level DC converter apparatus and electric energy conversion method employing same |
| CN103825454B (en) * | 2013-12-17 | 2016-08-17 | 中国船舶重工集团公司第七一九研究所 | A kind of three level DC converting means and use the transformation of electrical energy method of this device |
| CN104065276A (en) * | 2014-06-27 | 2014-09-24 | 华为技术有限公司 | Method and apparatus for controlling three-phase uninterrupted power supply and three-phase uninterrupted power supply |
| WO2015196838A1 (en) * | 2014-06-27 | 2015-12-30 | 华为技术有限公司 | Control method and device for three-phase uninterruptible power supply, and three-phase uninterruptible power supply |
| CN104065276B (en) * | 2014-06-27 | 2017-01-25 | 华为技术有限公司 | Method and apparatus for controlling three-phase uninterrupted power supply and three-phase uninterrupted power supply |
| US10348127B2 (en) | 2014-06-27 | 2019-07-09 | Huawei Technologies Co., Ltd. | Three-phase uninterruptible power supply control method and apparatus, and three-phase uninterruptible power supply responsive to zero wire loss |
| CN107769538A (en) * | 2017-12-07 | 2018-03-06 | 深圳市华星光电技术有限公司 | Power factor correction circuit and circuit of reversed excitation |
| CN109995229A (en) * | 2018-01-02 | 2019-07-09 | 台达电子企业管理（上海）有限公司 | Pfc circuit |
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| CN100379130C (en) | 2008-04-02 |
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