POWER FACTOR CORRECTION CONVERTER AND POWER FACTOR CORRECTION CONVERSION DEVICE

• US 20130003427A1
• Filed: 08/21/2012
• Published: 01/03/2013
• Est. Priority Date: 07/01/2011
• Status: Active Grant

• Current Assignee: Huawei Digital Power Technologies Company Limited (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: PAN, Denghai
• Granted Patent: US 8,531,854 B2
• Time in Patent Office: Days
• US Class Current: 363/44
• CPC Class Codes: H02M 1/0064 Magnetic structures combining different functions, e.g. storage, filtering or transformation
• CPC Class Codes: H02M 1/0085 Partially controlled bridges
• CPC Class Codes: H02M 1/4208 Arrangements for improving power factor of AC input
• CPC Class Codes: H02M 1/4225 using a non-isolated boost converter
• CPC Class Codes: H02M 3/1584 with a plurality of power processing stages connected in parallel
• CPC Class Codes: H02M 7/219 in a bridge configuration
• CPC Class Codes: Y02B 70/10 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
• CPC Class Codes: Y02P 80/10 Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Abstract

A power factor correction converter and a power factor correction conversion device, includes two groups of bidirectional switches, an autotransformer, a boost inductor, a bus filter capacitor, two front bridge arms; and a rear bridge arm; the front end of each group of bidirectional switches are connected to a coil of the autotransformer in one-to-one correspondence, and a rear end of each group of bidirectional switches is connected to one end of an AC input power grid; a central tap of the autotransformer is connected to an output end of the boost inductor, and an input end of the boost inductor is connected to the other end of the AC input power grid; a front end of each group of bidirectional switches is connected to a front bridge arm, and a rear end is connected to the rear bridge arm.

Claims

1. A power factor correction converter, comprising at least two groups of bidirectional switches, an autotransformer, a boost inductor, a bus filter capacitor, at least two front bridge arms and a rear bridge arm;

wherein a front end of each group of the at least two groups of the bidirectional switches is connected to a coil of the autotransformer in one-to-one correspondence, a rear end of each group of the at least two groups of the bidirectional switches is connected to one end of an AC input power grid;

a central tap of the autotransformer is connected to an output end of the boost inductor, an input end of the boost inductor is connected to the other end of the AC input power grid or, a central tap of the autotransformer is connected to the other end of the AC input power grid, and the boost inductor is integrated in the autotransformer;

the front end of each of the at least two groups of bidirectional switches is connected to an intermediate connection point of one of the front bridge arms, the rear end of each of the at least two groups of bidirectional switches is connected to an intermediate connection point of the rear bridge arm;

each of the front bridge arms include two diodes unidirectionally connected in series, the intermediate connection point is located between the two diodes, two ends of each of the front bridge arms are connected to two ends of the bus filter capacitor, respectively; and

the rear bridge arm includes two diodes unidirectionally connected in series, the intermediate connection point is located between the two diodes, and two ends of the rear bridge arm are connected to two ends of the bus filter capacitor, respectively.

2. The power factor correction converter according to claim 1, wherein the at least two groups of bidirectional switches are only two groups.

3. The power factor correction converter according claim 1, wherein the number of turns of each coil in the autotransformer is equal.

4. The power factor correction converter according claim 1, wherein the at least two front bridge arms each are formed by two fast diodes unidirectionally connected in series.

5. The power factor correction converter according to claim 1, further comprising a protective bridge arm, wherein the protective bridge arm comprises two protective diodes unidirectionally connected in series, an intermediate connection point located between two protective diodes is connected to the input end of the boost inductor, and two ends of the protective bridge arm are connected to two ends of the bus filter capacitor, respectively.

6. The power factor correction converter according to claim 1, further comprising two clamped capacitors configured to suppress common mode noise interference, wherein two ends of the two clamped capacitors are connected to two ends of the AC input power grid, respectively, and the other two ends of the two clamped capacitors connected with each other are connected to one end of the bus filter capacitor.

7. A power factor correction conversion device, comprising the foregoing power factor correction converter according to claim 1, an AC input power grid, and a load, wherein

one end of the AC input power grid is connected to the rear end of each group of bidirectional switches, the other end of the AC input power grid is connected to the input end of the boost inductor;

and

two ends of the load are connected to two ends of a bus filter capacitor, respectively.

8. The power factor correction conversion device according claim 7, comprising a pulse width modulation controller;

wherein

each of the bidirectional switches is a MOS transistor or a transistor; and

the pulse width modulation controller is connected to a gate of the MOS transistor or is connected to a base of the transistor.