CN1307399A - Power factor corrector - Google Patents
Power factor corrector Download PDFInfo
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- CN1307399A CN1307399A CN00101758A CN00101758A CN1307399A CN 1307399 A CN1307399 A CN 1307399A CN 00101758 A CN00101758 A CN 00101758A CN 00101758 A CN00101758 A CN 00101758A CN 1307399 A CN1307399 A CN 1307399A
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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
本发明的功率因数校正器,包括桥式整流电路及由电感Lf、二极管D和主开关K构成的T形电路,还包括有电感Lr、电容Cs、Cr、辅助开关S、二极管Dc、D3、Dm的辅助电路,该功率因数校正器结构简单,由于利用辅助电路中的电感Lr,电容Cr、Cs共同组成谐振回路,既能实现主开关的零电压转移和定频控制,又能实现辅助开关的零电流开关,能有效地提高功率因数校正器的工作效率。
The power factor corrector of the present invention includes a bridge rectifier circuit and a T-shaped circuit composed of an inductor Lf, a diode D and a main switch K, and also includes an inductor Lr, capacitors Cs, Cr, auxiliary switches S, diodes Dc, D3, The auxiliary circuit of Dm, the power factor corrector has a simple structure, because the inductance Lr in the auxiliary circuit, the capacitance Cr and Cs together form a resonant circuit, it can not only realize the zero voltage transfer and fixed frequency control of the main switch, but also realize the auxiliary switch The zero current switch can effectively improve the working efficiency of the power factor corrector.
Description
本发明涉及一种功率因数校正器。The invention relates to a power factor corrector.
目前应用脉宽调制(PWM)技术的功率因数校正器具有桥式整流电路及由电感、二极管和主开关构成的T形电路，其中主开关的一端接在电感与二极管的接点上，另一端接地，电感的另一端与整流电路的正电压输出端相连，二极管另一端为校正器输出，电网供给的交流电通过整流，在电感和主开关作用下，通过二极管输出一恒定电压。这种功率因数校正器由于主开关工作在硬开关，电路的损耗较大，故其效率较低。At present, the power factor corrector using pulse width modulation (PWM) technology has a bridge rectifier circuit and a T-shaped circuit composed of an inductor, a diode and a main switch. One end of the main switch is connected to the junction of the inductor and the diode, and the other end is grounded. , the other end of the inductance is connected to the positive voltage output end of the rectifier circuit, the other end of the diode is the output of the corrector, the alternating current supplied by the grid is rectified, and under the action of the inductance and the main switch, a constant voltage is output through the diode. Since the main switch of this power factor corrector works as a hard switch, the loss of the circuit is relatively large, so its efficiency is low.
鉴于上述，本发明的目的是提供一种结构简单、工作效率高的功率因数校正器。In view of the above, the object of the present invention is to provide a power factor corrector with simple structure and high working efficiency.
本发明的技术解决方案是，在现有的功率因数校正器上接入辅助电路，发明的功率因数校正器包括桥式整流电路及由电感Lf、二极管D和主开关K这三条支路构成的T形电路，其特征是还包括有电感Lr、电容Cs、Cr、辅助开关S、二极管Dc、D3、Dm的辅助电路，二极管Dm与主开关K反并联，电容Cs和电感Lr的一端共接于T形电路的接点，电容Cs的另一端接地，电感Lr的另一端接二极管Dc及电容Cr，二极管Dc的另一端与二极管D输出端相连，电容Cr的另一端与辅助开关S、反并联二极管D3的电路相连，该并联电路的另一端接地。The technical solution of the present invention is to connect the auxiliary circuit to the existing power factor corrector, and the invented power factor corrector includes a bridge rectifier circuit and a circuit consisting of three branches of the inductor Lf, the diode D and the main switch K. The T-shaped circuit is characterized in that it also includes an auxiliary circuit with an inductor Lr, capacitors Cs, Cr, auxiliary switches S, diodes Dc, D3, and Dm, the diode Dm is connected in antiparallel to the main switch K, and one end of the capacitor Cs and the inductor Lr are connected in common At the junction of the T-shaped circuit, the other end of the capacitor Cs is grounded, the other end of the inductor Lr is connected to the diode Dc and the capacitor Cr, the other end of the diode Dc is connected to the output end of the diode D, and the other end of the capacitor Cr is connected to the auxiliary switch S and antiparallel The circuit of diode D3 is connected, and the other end of this parallel circuit is grounded.
工作时，利用辅助电路中的电感Lr，电容Cr，Cs共同组成谐振电路，实现主开关的零电压开通和辅助开关的零电流关断。When working, the inductance Lr, capacitance Cr, and Cs in the auxiliary circuit are used to form a resonant circuit to realize the zero-voltage turn-on of the main switch and the zero-current turn-off of the auxiliary switch.
以下结合附图对本发明作详细描述。The present invention will be described in detail below in conjunction with the accompanying drawings.
图1是本发明构成示意图。Fig. 1 is a schematic diagram of the structure of the present invention.
参照图1，本发明的功率因数校正器，包括桥式整流电路及由电感Lf、二极管D和主开关K这三条支路构成的T形电路，还包括有电感Lr、电容Cs、Cr、辅助开关S、二极管Dc、D3、Dm的辅助电路，二极管Dm与主开关K反并联，电容Cs和电感Lr的一端共接于T形电路的接点A，电容Cs的另一端接地，电感Lr的另一端接二极管Dc及电容Cr，二极管Dc的另一端与二极管D输出端相连，电容Cr的另一端与辅助开关S、反并联二极管D3的电路相连，该并联电路的另一端接地。Referring to Fig. 1, the power factor corrector of the present invention includes a bridge rectifier circuit and a T-shaped circuit composed of three branches of an inductance Lf, a diode D and a main switch K, and also includes an inductance Lr, a capacitor Cs, Cr, an auxiliary Auxiliary circuit of switch S, diodes Dc, D3, Dm, diode Dm is connected in antiparallel with main switch K, one end of capacitor Cs and inductor Lr are connected to contact A of T-shaped circuit, the other end of capacitor Cs is grounded, and the other end of inductor Lr One end is connected to a diode Dc and a capacitor Cr, the other end of the diode Dc is connected to the output end of the diode D, the other end of the capacitor Cr is connected to the circuit of the auxiliary switch S and the anti-parallel diode D3, and the other end of the parallel circuit is grounded.
辅助开关S可以采用开关管MOSFET或IGBT。通常，为简化电路，与辅助开关S并联的二极管D3可以是辅助开关内部寄生二极管。与主开关K反并联的二极管Dm也可以是主开关内部寄生二极管。The auxiliary switch S can use a switch tube MOSFET or IGBT. Usually, to simplify the circuit, the diode D3 connected in parallel with the auxiliary switch S may be an internal parasitic diode of the auxiliary switch. The diode Dm connected in antiparallel with the main switch K may also be an internal parasitic diode of the main switch.
本发明功率因数校正器的工作过程如下：The working process of the power factor corrector of the present invention is as follows:
假设电路的初始状态为：主开关K关断，电感Lf通过二极管D向负载侧输送能量。谐振电容Cr的初始电压为下正上负，主开关K的吸收电容Cs的电压被钳位在输出电压Vout上。Assume that the initial state of the circuit is: the main switch K is off, and the inductor Lf transmits energy to the load side through the diode D. The initial voltage of the resonant capacitor Cr is positive at the bottom and negative at the top, and the voltage of the absorbing capacitor Cs of the main switch K is clamped at the output voltage Vout.
当辅助开关S在主开关K导通前开通，在电容Cr上的初始电压和输出电压Vout的共同作用下，电感Lr和二极管D之间的换流迅速完成，而后主开关K的吸收电容Cs和电感Lr，电容Cr组成谐振回路，将电容Cs上的电压谐振到零，这时，主开关K的漏极和源极之间电压为零。此后，主开关K的反并联二极管Dm续流导通，保证了主开关K的零电压状态。如果主开关K在二极管Dm续流导通期间开通，就可以实现主开关K的零电压开通。于此同时，电容Cr上的电压逐渐由下正上负变为下负上正，二极管Dc的存在保证了电容Cr上的电压不会高于输出电压Vout。当主开关K导通后，电容Cr，电感Lr，主开关K和辅助开关S上的反并联二极管D3组成谐振回路，进行谐振。若辅助开关S在其反并联二极管导通期间关断，就可以实现零电流关断。当谐振电感Lr的电流谐振为零后，谐振支路恢复到初始状态，退出工作，电路由电感Lf、主开关K、二极管D继续工作，完成一个工作周期。When the auxiliary switch S is turned on before the main switch K is turned on, under the joint action of the initial voltage on the capacitor Cr and the output voltage Vout, the commutation between the inductor Lr and the diode D is completed quickly, and then the absorbing capacitor Cs of the main switch K Together with the inductance Lr and the capacitor Cr, it forms a resonant circuit, which resonates the voltage on the capacitor Cs to zero. At this time, the voltage between the drain and the source of the main switch K is zero. Thereafter, the anti-parallel diode Dm of the main switch K conducts freewheeling, which ensures the zero-voltage state of the main switch K. If the main switch K is turned on during the freewheeling conduction period of the diode Dm, the zero-voltage turn-on of the main switch K can be realized. At the same time, the voltage on the capacitor Cr gradually changes from lower positive and upper negative to lower negative and upper positive, and the existence of the diode Dc ensures that the voltage on the capacitor Cr will not be higher than the output voltage Vout. When the main switch K is turned on, the capacitor Cr, the inductor Lr, the anti-parallel diode D3 on the main switch K and the auxiliary switch S form a resonant circuit to resonate. If the auxiliary switch S is turned off during the conduction period of its anti-parallel diode, zero current turn-off can be achieved. When the current resonance of the resonant inductor Lr is zero, the resonant branch returns to the initial state and quits working. The circuit continues to work by the inductor Lf, the main switch K, and the diode D to complete a working cycle.
本发明的功率因数校正器结构简单，由于利用辅助电路中的电感Lr，电容Cr、Cs共同组成谐振回路，既能实现主开关的零电压转移和定频控制，又能实现辅助开关的零电流开关，能有效地提高功率因数校正器的工作效率。The structure of the power factor corrector of the present invention is simple, since the inductance Lr in the auxiliary circuit, the capacitors Cr and Cs are used to form a resonant circuit, it can not only realize the zero voltage transfer and constant frequency control of the main switch, but also realize the zero current of the auxiliary switch The switch can effectively improve the working efficiency of the power factor corrector.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00101758A CN1132302C (en) | 2000-01-24 | 2000-01-24 | Power factor corrector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00101758A CN1132302C (en) | 2000-01-24 | 2000-01-24 | Power factor corrector |
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| Publication Number | Publication Date |
|---|---|
| CN1307399A true CN1307399A (en) | 2001-08-08 |
| CN1132302C CN1132302C (en) | 2003-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00101758A Expired - Fee Related CN1132302C (en) | 2000-01-24 | 2000-01-24 | Power factor corrector |
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| CN (1) | CN1132302C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100433524C (en) * | 2002-04-18 | 2008-11-12 | 姜涛 | Digital high-quality active power factor correction method and its device, IC |
| CN100505493C (en) * | 2002-04-18 | 2009-06-24 | 姜涛 | Green switch power supply with standby function and IC thereof |
| CN100514812C (en) * | 2003-04-22 | 2009-07-15 | 三垦电气株式会社 | Power factor improving circuit |
| CN101924481A (en) * | 2009-06-09 | 2010-12-22 | 深圳市盛弘电气有限公司 | PFC (Power Factor Correction) rectifier circuit |
| CN101674065B (en) * | 2009-09-30 | 2012-07-18 | 艾默生网络能源有限公司 | Resonant circuit with coupled inductor and dynamic control method thereof |
| TWI761945B (en) * | 2020-09-09 | 2022-04-21 | 國立臺北科技大學 | Power factor corrector |
-
2000
- 2000-01-24 CN CN00101758A patent/CN1132302C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100433524C (en) * | 2002-04-18 | 2008-11-12 | 姜涛 | Digital high-quality active power factor correction method and its device, IC |
| CN100505493C (en) * | 2002-04-18 | 2009-06-24 | 姜涛 | Green switch power supply with standby function and IC thereof |
| CN100514812C (en) * | 2003-04-22 | 2009-07-15 | 三垦电气株式会社 | Power factor improving circuit |
| CN101924481A (en) * | 2009-06-09 | 2010-12-22 | 深圳市盛弘电气有限公司 | PFC (Power Factor Correction) rectifier circuit |
| CN101674065B (en) * | 2009-09-30 | 2012-07-18 | 艾默生网络能源有限公司 | Resonant circuit with coupled inductor and dynamic control method thereof |
| TWI761945B (en) * | 2020-09-09 | 2022-04-21 | 國立臺北科技大學 | Power factor corrector |
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| Publication number | Publication date |
|---|---|
| CN1132302C (en) | 2003-12-24 |
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According to article 9 of the patent law and article 13 of the detailed rules for the implementation of the patent law: 101758.6 of the invention patents in this issue as a notice of authorization, and at the same time corresponding to the 202935.9 utility model patent to be given up, and in the 19 volume of the 52 issue of the new type of communique on the patent right to abandon the announcement. |
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