POWER FACTOR CORRECTION CIRCUIT AND POWER SUPPLY CIRCUIT

• US 20140132230A1
• Filed: 12/20/2013
• Published: 05/15/2014
• Est. Priority Date: 11/09/2012
• 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: CHENG, Yang, WANG, Weifeng, YAO, Xiaofeng
• Granted Patent: US 9,502,962 B2
• Time in Patent Office: Days
• US Class Current: 323/210
• CPC Class Codes: H02M 1/4208 Arrangements for improving power factor of AC input
• CPC Class Codes: H02M 1/4216 operating from a three-phase input voltage H02M1/4233 takes precedence
• CPC Class Codes: H02M 1/4225 using a non-isolated boost converter
• 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

Abstract

Embodiments of the present application provide a power factor correction circuit and a power supply circuit. The power factor correction circuit includes a main correction circuit and a switch module. The main correction circuit includes: a first correction circuit and a second correction circuit that are configured to perform power factor correction on an forward alternating current voltage, and a third correction circuit and a fourth correction circuit that are configured to perform power factor correction on an inverse alternating current voltage. The switch module includes first switch units that are connected in parallel between an input terminal of the first correction circuit and an input terminal of the third correction circuit, and second switch units that are connected in parallel between an input terminal of the second correction circuit and an input terminal of the fourth correction circuit.

Claims

1. A power factor correction circuit, comprising:

a main correction circuit and a switch module, wherein;

the main correction circuit comprises;

a first correction circuit and a second correction circuit that are configured to perform power factor correction on an forward alternating current voltage, and a third correction circuit and a fourth correction circuit that are configured to perform power factor correction on an inverse alternating current voltage, wherein output terminals of the first correction circuit, the second correction circuit, the third correction circuit, and the fourth correction circuit are electrically connected;

the switch module comprises first switch units that are connected in parallel between an input terminal of the first correction circuit and an input terminal of the third correction circuit, and second switch units that are connected in parallel between an input terminal of the second correction circuit and an input terminal of the fourth correction circuit; and

the first switch unit and the second switch unit each comprise two controlled switches that are connected in series, wherein a voltage input terminal connected to a voltage input terminal providing an alternating current input voltage is set between the two controlled switches.

2. The power factor correction circuit according to claim 1, wherein:

each correction circuit comprises an inductor, a diode, and a capacitor that are connected in sequence, and a switch component connected between the diode and the capacitor.

3. The power factor correction circuit according to claim 2, wherein:

the first correction circuit and the second correction circuit share a capacitor.

4. The power factor correction circuit according to claim 1, wherein:

the switch module comprises three first switch units that are connected in parallel and three second switch units that are connected in parallel, wherein one of the first switch units and one of the second switch units form an input voltage control switch block; and

a voltage input terminal on each pair of input voltage control switch blocks is configured to connect alternating current input voltages of different phases in a three-phase alternating current input voltage.

5. The power factor correction circuit according to claim 1, wherein:

the controller switch is a thyristor.

6. A power supply circuit, comprising the power factor correction circuit specified in claim 1, wherein:

a switch module in the power factor correction circuit is connected to an alternating current power supply, and the alternating current power supply is configured to provide an alternating current input voltage.

7. The power supply circuit according to claim 6, further comprising a direct current power supply for supplying a direct current voltage, wherein the direct current power supply is mounted in the power supply circuit by using a switch component, and is configured to provide a direct current voltage when the alternating current power supply fails.

8. The power supply circuit according to claim 7, wherein:

the direct current power supply is mounted on at least one of an input terminal and an output terminal of the switch module.

9. The power supply circuit according to claim 7, wherein:

the direct current power supply is mounted between an neutral wire and at least two of three phases of output terminals of the alternating current power supply each by using a switch component.

10. The power supply circuit according to claim 7, wherein:

the direct current power supply is mounted between any two of three phases of output terminals of the alternating current power supply by using a switch component.

11. The power supply circuit according to claim 7, wherein:

the direct current power supply is mounted between at least one of three phases of output terminals of the alternating current power supply and each of the input terminal of the third correction circuit and the input terminal of the fourth correction circuit, and a switch component is connected between the direct current power supply and the at least one phase of output terminal, and between the direct current power supply and each of the input terminal of the third correction circuit and the input terminal of the fourth correction circuit.

12. The power supply circuit according to claim 7, wherein:

the direct current power supply is mounted between either of the input terminal of the first correction circuit and the input terminal of the second correction circuit and either of the input terminal of the third correction circuit and the input terminal of the fourth correction circuit, via a switch component.

13. The power supply circuit according to claim 7, wherein:

the direct current power supply is mounted between the input terminals of the first correction circuit and the second correction circuit and the input terminals of the third correction circuit and the fourth correction circuit, and a switch component is connected between the direct current power supply and the input terminals of the first correction circuit, the second correction circuit, the third correction circuit, and the fourth correction circuit.

14. The power supply circuit according to claim 7, wherein:

the direct current power supply is mounted between a neutral wire and at least one of the input terminals of the first correction circuit and the second correction circuit, and between the neutral wire and the input terminals of at least one of the third correction circuit and the fourth correction circuit respectively by using a switch component.

15. The power supply circuit according to claim 7, wherein:

the direct current power supply is connected between an neutral wire and at least one of three phases of output terminals of the alternating current power supply, and between the neutral wire and the first correction circuit, the second correction circuit, the third correction circuit, or the fourth correction circuit, respectively by using a switch component.

16. The power factor correction circuit according to claim 3, wherein the third correction circuit and the fourth correction circuit share a capacitor.