Title:
PFC CIRCUIT WITH SINGLE-PHASE AND THREE-PHASE ALTERNATING-CURRENT INPUTS BEING COMPATIBLE, AND CONTROL METHOD AND CHARGER
Document Type and Number:
WIPO Patent Application WO/2022/110891
Kind Code:
A1
Abstract:
Provided are a PFC circuit with single-phase and three-phase alternating-current inputs being compatible, which circuit can be used for a vehicle-mounted electric motor, and a control method and a charger. The PFC circuit is used for connecting an alternating-current power grid side and a direct-current circuit side, and the PFC circuit comprises a relay module, a three-phase PFC power module and a direct-current side filter module. Two phases of the alternating-current power grid side are respectively connected to two input ends of the three-phase PFC power module, and a null line, or a third phase of the alternating-current power grid side is connected to a third input end of the three-phase PFC power module by means of the relay module. The working modes of the PFC circuit comprise a three-phase working mode and a single-phase working mode, and the three-phase working mode and/or the three-phase working mode can respectively work in a rectification state or an inversion state. The number of relays used by the PFC circuit provided in the present invention is smaller, such that the cost, and the volume of a circuit board can be reduced. Moreover, regardless of a sudden change from a three-phase input to a single-phase input or a sudden change from a single-phase input to a three-phase input, a relay module does not short circuit a power grid circuit, thereby achieving low failure risk.
Inventors:
WEN WEI (CN)
WANG YANBIN (CN)
YUAN WEN (CN)
WANG XIAOKUN (CN)
LIU SHAOWEI (CN)
WANG YANBIN (CN)
YUAN WEN (CN)
WANG XIAOKUN (CN)
LIU SHAOWEI (CN)
Application Number:
PCT/CN2021/111058
Publication Date:
June 02, 2022
Filing Date:
August 05, 2021
Export Citation:
Assignee:
UNITED AUTOMOTIVE ELECT SYS CO (CN)
International Classes:
H02M1/32; H02M1/42; H02M1/44; H02M7/219
Foreign References:
| CN112636577A | 2021-04-09 | |||
| CN110406406A | 2019-11-05 | |||
| CN109842287A | 2019-06-04 | |||
| CN103746436A | 2014-04-23 | |||
| CN110518680A | 2019-11-29 | |||
| CN102157968A | 2011-08-17 | |||
| EP3700072A1 | 2020-08-26 |
Attorney, Agent or Firm:
SHANGHAI SAVVY INTELLECTUAL PROPERTY AGENCY (CN)
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