ELECTRIC MOTOR POWER SYSTEM AND ELECTRIC VEHICLE

PROBLEM TO BE SOLVED: To reduce inductive interference caused from a grounding cable branched from/connected to a main conversion device.SOLUTION: An electric motor power system is provided that comprises: a first grounding conductor connected to earth electric potential of a main conversion device and connected to a grounding brush of a first wheel being a driving object of a main electric motor; a grounding conductor branched from the first grounding conductor, that is, a second grounding conductor connected to the grounding brush of a second wheel being the driving object of the main electric motor; and a first annular core into which the first grounding conductor and the second grounding conductor are inserted in directions in which higher harmonic currents flow in directions inverse to each other. In the electric motor power system, inductive interference caused from the grounding conductor can be reduced since the higher harmonic currents flowing to a plurality of grounding conductors branched from/connected to the main conversion device are offset.SELECTED DRAWING: Figure 4 【課題】本発明の目的は、主変換装置に分岐接続された接地線から発生する誘導障害を低減することに関する。【解決手段】本発明は、主変換装置のアース電位に接続され、主電動機の駆動対象である第１の車輪の接地ブラシに接続される第１の接地線と、第１の接地線から分岐された接地線であって、主電動機の駆動対象である第２の車輪の接地ブラシに接続される第２の接地線と、高調波電流が互いに逆方向に流れる向きに第１の接地線と第２の接地線が挿入された第１の環状コアと、を備えることに関する。本発明によれば、主変換装置に分岐接続された複数の接地線に流れる高調波電流が相殺されるため、接地線から発生する誘導障害を低減することができる。【選択図】図４