AUXILIARY PRE-CHARGING DEVICE OF POWER CONVERTER PRE-CHARGING METHOD AND POWER CONVERTER

Abstract: the present invention provides an auxiliary pre-charging device for a power converter. the power converter includes at least one power unit with an input end being connected to a medium and high voltage ac power source, and an output end being connected to a low voltage dc bus, wherein the auxiliary pre-charging device includes a switch, a transformer, a pre-charging resistor, and a rectifier sequentially connected in series, one end of the switch is connected to the medium and high voltage ac power source, and an output end of the rectifier is connected to the low voltage dc bus. the present invention also provides a pre-charging method for a power converter, which uses the aforementioned auxiliary pre-charging device to start pre-charging at the low-voltage output end of the power converter.

Inventor(s): Jianxiong Yu, Jiajie Duan, Han Li, Cheng Luo, Qiang Chen

CPC Classification: H02M5/4585 (APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers ; dynamo-electric converters ; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters ))

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