CN101217254A - A semi-initiative type active power factor corrector and correction method - Google Patents
A semi-initiative type active power factor corrector and correction method Download PDFInfo
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- CN101217254A CN101217254A CNA2008100259491A CN200810025949A CN101217254A CN 101217254 A CN101217254 A CN 101217254A CN A2008100259491 A CNA2008100259491 A CN A2008100259491A CN 200810025949 A CN200810025949 A CN 200810025949A CN 101217254 A CN101217254 A CN 101217254A
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- power factor
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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
Abstract
The invention relates to a semi active power factor corrector and a correct method. A first end and a third end of a first bridge circuit in the corrector are respectively connected with the N end and the L end of alternating current, and a power frequency inductance is arranged in the third end of the first bridge circuit and the L end of the alternating current; C pole and E pole of IGBT are respectively connected with a second end and a fourth end of the first bridge circuit, and the G pole of the IGBT is connected with a control unit; a first end and a third end of a second bridge circuit are respectively connected with the third end and the first end of the first bridge circuit, and a post capacitance is connected between a second end and a fourth end of the second bridge circuit. The correct method is that after detecting zero crossing of the alternating current, the IGBT is controlled to open up one or more pulses, and then the power frequency inductance is charged so as to store energy, and when the IGBT is closed, the power frequency inductance releases the stored energy to the post capacitance. The invention eliminates the defect of large voltage drop of passive PFC inductance and solves the problem of big EMI interference in active PFC.
Description
Technical field
The present invention relates to electric and electronic technical field, relate in particular to power factor corrector and bearing calibration.
Background technology
(Power Factor Correction PFC) mainly takes passive type and active two kinds of schemes to the current power factor adjuster.
Passive PFC mainly adopts the combination of power frequency reactor and this two classes device of electric capacity, reaches the purpose that suppresses harmonic current, improves power factor (PF).The advantage of this method is that cost is low, reliability is high.But the effect of its power factor correction is limited, in use also can produce bigger pressure drop on inductance, influences the DC bus-bar voltage after the rectification of back, and particularly its voltage drop is severe more when current ratio is bigger.
As shown in Figure 1, active PFC mainly adopts high-frequency inductor and high-speed power device (as IGBT or MOSFET etc.), and reaches the purpose that suppresses harmonic current, improves power factor by the closed-loop control to electric current and voltage.This method effect is best, and power factor can reach more than 99%, and the harmonic content of electric current also can be suppressed at below 10%, and output voltage stabilization.But owing to used high-frequency inductor and high-speed power device, the deficiency of its maximum is exactly an EMI (electromagnetic interference, Electromagnetic Interference is called for short EMI) issue handling is cumbersome, the complicated cost height of Design of Filter, the high-frequency inductor cost that itself uses is also higher simultaneously; Control is complicated in addition, and debugging difficulty is big.
Summary of the invention
The objective of the invention is at passive PFC pressure drop on inductance big shortcoming and active PFC conducted interference big, the cost height, the shortcoming that control is complicated provides a kind of semi-initiative type active power factor corrector and bearing calibration.
The objective of the invention is to realize by following technical scheme:
A kind of semi-initiative type active power factor corrector, it is characterized in that, mainly by first bridge circuit, second bridge circuit, frequency inductance, IGBT, back level electric capacity constitutes, the 1st end of first bridge circuit and the 3rd end connect the N and the L end of alternating current respectively, frequency inductance is arranged on the 3rd end and the alternating current L end of first bridge circuit, the C utmost point of IGBT and the E utmost point are connected the 2nd end and the 4th end of first bridge circuit respectively, the G utmost point of IGBT connects control unit, the 1st end of second bridge circuit and the 3rd end are connected with the 3rd end and the 1st end of first bridge circuit respectively, connect back level electric capacity between the 2nd end of second bridge circuit and the 4th end.
A kind of semi-initiative type active power factor calibrating method, based on above-mentioned semi-initiative type active power factor corrector, the method is characterized in that, after detecting alternating voltage zero-crossing, control IGBT immediately and open one or more pulses, to frequency inductance charge, energy storage, when IGBT was closed, frequency inductance discharged the electric capacity of the energy of storage to the back level.
The scheme of the semi-initiative type active PFC that the present invention proposes can be eliminated the big shortcoming of passive PFC inductor pressure drop, has solved the big problem of EMI interference among the active PFC simultaneously.This scheme has improved cost performance of product greatly by under the harmonic wave testing standard prerequisite of national regulation.
Description of drawings
Fig. 1 is the structure chart of existing active PFC;
Fig. 2 is the structure chart of semi-initiative type active power factor corrector of the present invention;
Control signal oscillogram when Fig. 3 controls for adopting pulse in the semi-initiative type active power factor bearing calibration of the present invention;
Control signal oscillogram when Fig. 4 controls for adopting dipulse in the semi-initiative type active power factor bearing calibration of the present invention;
The control signal oscillogram of Fig. 5 when adopting bilateral control mode in the semi-initiative type active power factor bearing calibration of the present invention.
Embodiment
As shown in Figure 2, the semi-initiative type active power factor corrector that present embodiment provides is mainly by the first bridge circuit BR1, the second bridge circuit BR2, frequency inductance, IGBT (Insulated Gate Bipolar Transistor insulated gate bipolar power tube), back level electric capacity constitutes, the 1st end of the first bridge circuit BR1 and the 3rd end connect the N and the L end of alternating current respectively, frequency inductance is arranged on the 3rd end and the alternating current L end of first bridge circuit, the C utmost point of IGBT and the E utmost point are connected the 2nd end and the 4th end of the first bridge circuit BR1 respectively, the G utmost point of IGBT connects control unit (MCU or DSP), the 1st end of the second bridge circuit BR2 and the 3rd end are connected with the 3rd end and the 1st end of the first bridge circuit BR1 respectively, connect described back level electric capacity between the 2nd end of the second bridge circuit BR2 and the 4th end.
What above-mentioned semi-initiative type active PFC adopted classical active PFC opens up the benefit structure, and the characteristics of using for reference the BOOST circuit design, and with frequency inductance and low speed IGBT combination, plays the function that suppresses pressure drop on harmonic wave and the compensating inductance, and principle is as follows:
Suppose that the frequency inductance both end voltage is Δ V, IGBT service time is T
On, inductance value is L, and output voltage is Vo, and input voltage is Vin.Its both end voltage was when then IGBT opened:
When IGBT turn-offed, the voltage at inductance two ends was reverse immediately, and the input voltage that therefore superposes charges to back level electric capacity, so V
o=V
In+ Δ V, thus reach the purpose of pressure drop on the compensating inductance.
Based on above-mentioned semi-initiative type active PFC, its method of carrying out power factor correction is as follows: after detecting alternating voltage zero-crossing, control IGBT immediately and open one or more pulses, to frequency inductance charge, energy storage, increased the angle of flow of electric current like this, thereby the inhibition harmonic current has improved power factor; When IGBT was closed, frequency inductance discharged the electric capacity of the energy of storage to the back level, the pressure drop that compensating inductance causes.
Be three kinds of specific implementations below:
1, pulse scheme: as shown in Figure 3, an effective impulse control of output IGBT opens after each cycle zero passage.
After interrupting detecting the alternating voltage zero-crossing signal, the MCU of control IGBT or DSP are immediately according to alternating current (I
Ac) effective value calculate a pulse duration (T
On), T
On=kI
AcBehind inductance and electric capacity that fixed system is selected for use, the k value is adjusted according to concrete harmonic wave test case, adjusts to optimum state.
2, dipulse controlling schemes: as shown in Figure 4, open a pair of effective impulse control IGBT after each cycle zero passage, in a paired pulses, the effective impulse in front belongs to main pulse, works to suppress harmonic wave and improves power factor; The another one effective impulse is set smallerly, belongs to false impulse, can ignore to the influence of harmonic current, works to reduce the reactor noise.
After interrupting detecting the alternating voltage zero-crossing signal, the MCU of control IGBT or DSP are immediately according to the effective value (I of alternating current
Ac) calculate one or more main pulse width (T
On), T
On=kI
Ac(the corresponding a plurality of k values of a plurality of main pulses possibilities this moment).Behind inductance and electric capacity that fixed system is selected for use, the number of k value and dipulse is adjusted according to concrete harmonic wave test case, adjusts to optimum state.False impulse is then selected according to the intrinsic vibration frequency of inductance after the k value of having selected inductance and main pulse, and the width of this pulse is the pulse of a fixed width.Conversely, k value and dipulse number chooses and can influence choosing of inductance and electric capacity.Both take all factors into consideration to reach cost performance the highest.
3, " bilateral " controlling schemes: as shown in Figure 5, in per half sine wave period of AC-input voltage, after zero passage, IGBT is carried out a plurality of pulse controls of fixed frequency, simultaneously, a plurality of pulses that also increase fixed frequency in a period of time before next zero passage arrives are controlled IGBT.
After interrupting detecting the alternating voltage zero-crossing signal, the MCU of control IGBT or DSP export the control impuls that a string fixed-frequency, duty ratio change according to certain rules, the service time (T of each pulse immediately
On) mainly according to the size (I that exchanges input current
Ac) and back level electrochemical capacitor on voltage V
oWith the setting output voltage V
DcDifference (this voltage is error voltage, and V represents with Δ) determine T
On=k
1I
Ac+ k
2Δ V.K1 wherein, k2 determine the requirement and the actual harmonic wave test data of output dc voltage according to sensibility reciprocal, the electrolytic capacitor filter capacity of back level, the system of the frequency inductance of selecting for use.Conversely, under the situation that system determines output dc voltage, can also suitably adjust k1, k2,, improve the cost performance of whole system so that inductance of selecting for use and electric capacity reach price is minimum.
More than three controlling schemes can also be according to actual needs directly according to output voltage (V
o) control the duty ratio of the effective impulse in each scheme, reach the purpose of regulated output voltage.
Claims (8)
1. semi-initiative type active power factor corrector, it is characterized in that, mainly by first bridge circuit, second bridge circuit, frequency inductance, IGBT, back level electric capacity constitutes, the 1st end of first bridge circuit and the 3rd end connect the N and the L end of alternating current respectively, frequency inductance is arranged on the 3rd end and the alternating current L end of first bridge circuit, the C utmost point of IGBT and the E utmost point are connected the 2nd end and the 4th end of first bridge circuit respectively, the G utmost point of IGBT connects control unit, the 1st end of second bridge circuit and the 3rd end are connected with the 3rd end and the 1st end of first bridge circuit respectively, connect back level electric capacity between the 2nd end of second bridge circuit and the 4th end.
2. semi-initiative type active power factor calibrating method, based on the described semi-initiative type active power factor corrector of claim 1, the method is characterized in that, after detecting alternating voltage zero-crossing, control IGBT immediately and open one or more pulses, to frequency inductance charge, energy storage, when IGBT was closed, frequency inductance discharged the electric capacity of the energy of storage to the back level.
3. semi-initiative type active power factor calibrating method according to claim 2, it is characterized in that, the concrete mode that described control IGBT opens one or more pulses is the pulse control mode, and an effective impulse control of output IGBT opens after each cycle zero passage.
4. semi-initiative type active power factor calibrating method according to claim 3 is characterized in that, the pulse width T of described pulse
On=kI
Ac, behind inductance and electric capacity that fixed system is selected for use, the k value is adjusted according to concrete harmonic wave test case, adjusts to optimum state.
5. semi-initiative type active power factor calibrating method according to claim 2, it is characterized in that, the concrete mode that described control IGBT opens one or more pulses is the dipulse control mode, after each cycle zero passage, open a pair of effective impulse control IGBT, the effective impulse in front belongs to main pulse, works to suppress harmonic wave and improves power factor; The another one effective impulse is set smallerly, belongs to false impulse, works to reduce the reactor noise.
6. semi-initiative type active power factor calibrating method according to claim 5 is characterized in that, the width T of main pulse in the described dipulse
On=kI
Ac, behind inductance and electric capacity that fixed system is selected for use, the number of k value and dipulse is adjusted according to concrete harmonic wave test case, adjusts to optimum state; False impulse is then selected according to the intrinsic vibration frequency of inductance after the k value of having selected inductance and main pulse, and the width of this pulse is the pulse of a fixed width.
7. semi-initiative type active power factor calibrating method according to claim 2, it is characterized in that, the concrete mode that described control IGBT opens one or more pulses is bilateral control mode, in per half sine wave period of AC-input voltage, after zero passage, IGBT is carried out a plurality of pulse controls of fixed frequency, simultaneously, a plurality of pulses that also increase fixed frequency in a period of time before next zero passage arrives are controlled IGBT.
8. semi-initiative type active power factor calibrating method according to claim 7 is characterized in that, the fixed-frequency of described each pulse, service time (T
On) mainly according to the size (I that exchanges input current
Ac) and back level electrochemical capacitor on voltage V
oWith the VD V that sets
DcDifference DELTA V determine T
On=k
1I
Ac+ k
2Δ V, k1 wherein, k2 determine the requirement and the actual harmonic wave test data of output dc voltage according to sensibility reciprocal, the electrolytic capacitor filter capacity of back level, the system of the frequency inductance of selecting for use.
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| CNA2008100259491A CN101217254A (en) | 2008-01-21 | 2008-01-21 | A semi-initiative type active power factor corrector and correction method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789685A (en) * | 2010-03-04 | 2010-07-28 | 广东美的电器股份有限公司 | Partial PFC device and control method thereof |
| CN104218787A (en) * | 2013-05-31 | 2014-12-17 | 浙江三花股份有限公司 | Power factor correction control method and device |
| US9036386B2 (en) | 2013-07-22 | 2015-05-19 | Regal Beloit America, Inc. | Interleaved two-stage power factor correction system |
| CN106533151A (en) * | 2016-12-05 | 2017-03-22 | 广东美的制冷设备有限公司 | Control method and control device of partial PFC circuit and domestic appliance |
| TWI605672B (en) * | 2016-10-07 | 2017-11-11 | 東元電機股份有限公司 | Active power factor correction circuit and method for control pulse width adjustment signal |
| CN107959412A (en) * | 2016-10-18 | 2018-04-24 | 东元电机股份有限公司 | The control method of active power factor correction circuit and pulse width adjustment signal |
| CN110868060A (en) * | 2019-11-29 | 2020-03-06 | 广东美的制冷设备有限公司 | Control method, control device, household appliance and computer readable storage medium |
| CN110880862A (en) * | 2019-11-29 | 2020-03-13 | 广东美的制冷设备有限公司 | Control method, control device, household electrical appliance and computer readable storage medium |
| CN110880863A (en) * | 2019-11-29 | 2020-03-13 | 广东美的制冷设备有限公司 | Control method, control device, household appliance and computer readable storage medium |
| CN111082651A (en) * | 2019-12-09 | 2020-04-28 | 珠海格力电器股份有限公司 | Circuit and method for diagnosing, correcting and recovering PFC bus abnormity |
| CN112886808A (en) * | 2019-11-29 | 2021-06-01 | 广东美的制冷设备有限公司 | Control method, control device, household appliance and computer readable storage medium |
-
2008
- 2008-01-21 CN CNA2008100259491A patent/CN101217254A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789685A (en) * | 2010-03-04 | 2010-07-28 | 广东美的电器股份有限公司 | Partial PFC device and control method thereof |
| CN101789685B (en) * | 2010-03-04 | 2012-11-07 | 广东美的电器股份有限公司 | Partial PFC device and control method thereof |
| CN104218787A (en) * | 2013-05-31 | 2014-12-17 | 浙江三花股份有限公司 | Power factor correction control method and device |
| US9036386B2 (en) | 2013-07-22 | 2015-05-19 | Regal Beloit America, Inc. | Interleaved two-stage power factor correction system |
| TWI605672B (en) * | 2016-10-07 | 2017-11-11 | 東元電機股份有限公司 | Active power factor correction circuit and method for control pulse width adjustment signal |
| CN107959412A (en) * | 2016-10-18 | 2018-04-24 | 东元电机股份有限公司 | The control method of active power factor correction circuit and pulse width adjustment signal |
| CN107959412B (en) * | 2016-10-18 | 2020-06-02 | 东元电机股份有限公司 | Active power factor correction circuit and control method of pulse width adjusting signal |
| CN106533151A (en) * | 2016-12-05 | 2017-03-22 | 广东美的制冷设备有限公司 | Control method and control device of partial PFC circuit and domestic appliance |
| CN110880862A (en) * | 2019-11-29 | 2020-03-13 | 广东美的制冷设备有限公司 | Control method, control device, household electrical appliance and computer readable storage medium |
| CN110880863A (en) * | 2019-11-29 | 2020-03-13 | 广东美的制冷设备有限公司 | Control method, control device, household appliance and computer readable storage medium |
| CN110868060A (en) * | 2019-11-29 | 2020-03-06 | 广东美的制冷设备有限公司 | Control method, control device, household appliance and computer readable storage medium |
| CN112886808A (en) * | 2019-11-29 | 2021-06-01 | 广东美的制冷设备有限公司 | Control method, control device, household appliance and computer readable storage medium |
| CN110880862B (en) * | 2019-11-29 | 2021-12-21 | 广东美的制冷设备有限公司 | Control method, control device, household electrical appliance and computer readable storage medium |
| CN112886808B (en) * | 2019-11-29 | 2022-06-10 | 广东美的制冷设备有限公司 | Control method, control device, household appliance and computer readable storage medium |
| CN111082651A (en) * | 2019-12-09 | 2020-04-28 | 珠海格力电器股份有限公司 | Circuit and method for diagnosing, correcting and recovering PFC bus abnormity |
| CN111082651B (en) * | 2019-12-09 | 2021-02-23 | 珠海格力电器股份有限公司 | Circuit and method for diagnosing, correcting and recovering PFC bus abnormity |
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Owner name: GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI; APPLICANT Free format text: FORMER OWNER: GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI Effective date: 20081024 |
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Effective date of registration: 20081024 Address after: No. 6 Jinji Road, front hill, Zhuhai, Guangdong Province, China: 519070 Applicant after: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI Co-applicant after: Zhuhai Landa Compressor Co., Ltd. Address before: No. 6 Jinji Road, front hill, Zhuhai, Guangdong Province, China: 519070 Applicant before: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI |
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Open date: 20080709 |