ELECTRIC POWER CONVERSION APPARATUS

摘要

PROBLEM TO BE SOLVED: To reduce common-mode noises generated by an electric power conversion apparatus in a simple structure.

SOLUTION: A part of a circuit reducing common-mode noises in an electric power conversion apparatus is formed by: (1) a first path 72 which is from a connection part 70P connecting a power cable 12P with a circuit board 14 through an inductor Lp to each of heat sinks 58 at upper arm MOSFETs 32 of switching element pairs; (2) capacitors CpA and CpB for reducing the common-mode noises; (3) a second path 72 which is from a connection part 70N connecting a power cable 12N with the circuit board 14 through an inductor Ln to each heatsink 58 at lower arm MOSFETs 34 of switching element pairs; and (4) capacitors CnA and CnB for reducing the common-mode noises. Each capacitance value is configured to satisfy (CpA+CpB)/(CnA+CnB)=Ln/Lp so that the common-mode noises can be reduced.

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