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Patent Searching and Data


Title:
SINGLE-PHASE AND THREE-PHASE COMPATIBLE CONVERSION CIRCUIT AND VEHICLE-MOUNTED CHARGER
Document Type and Number:
WIPO Patent Application WO/2021/179502
Kind Code:
A1
Abstract:
A single-phase and three-phase compatible conversion circuit, comprising an EMC module, a PFC module, a switch K1 and a control module. The EMC module is connected between A, B, C, and N wires of a power grid and the PFC module. The EMC module leads out three wires: A1, B1, and C1 to connect to the PFC module, and the three wires A1, B1, and C1 are connected to a set virtual midpoint by means of capacitors CX1, CX2, and CX3, respectively. The virtual midpoint is connected to a midpoint of a bus of the PFC module by means of the switch K1. The control module is used to detect an input signal of the power grid and control the state of the switch K1 according to the type of the input signal of the power grid. The single-phase and three-phase compatible conversion circuit may reduce the common mode noise of the three-phase conversion mode while ensuring that the three-phase conversion mode may use a control manner that has a relative large bus voltage regulation range. When switched to the single-phase conversion mode, the influence of the common mode noise on the input EMC at the direct current side can also be reduced.

Inventors:
LIU JUN (CN)
FENG YINGYING (CN)
YAO SHUN (CN)
FENG RENWEI (CN)
Application Number:
PCT/CN2020/101126
Publication Date:
September 16, 2021
Filing Date:
July 09, 2020
Export Citation:
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Assignee:
SHENZHEN VMAX NEW ENERGY CO LTD (CN)
International Classes:
H02J7/10; B60L53/22; H02M1/12
Foreign References:
CN111146851A2020-05-12
CN103227575A2013-07-31
CN104143931A2014-11-12
JP2011142740A2011-07-21
Attorney, Agent or Firm:
SHENZHEN KANGHONG INTELLECTUAL PROPERTY AGENT CO., LTD. (CN)
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