Patent ID: 9118229
Filing Date: 2015-08-25
Classification: H02K

Abstract:
1. An electric drive unit comprising: an inverter; a stator that receives an AC current from the inverter and forms a magnetic field; a rotor rotated by the magnetic field formed by the stator; a shaft that protrudes into both sides in an axial direction of the rotor and moves in synchronization with the rotor; an inverter casing that stores the inverter in a galvanic isolation state; and a motor housing that stores the stator and the rotor, rotatably supports one end of the shaft via a first bearing, and rotatably supports the other end of the shaft via a second bearing, wherein the inverter and the inverter casing are arranged in an inner side from a pair of bearings including the first and second bearings, wherein there are a plurality of paths where a high-frequency electric current generated from the inverter flows, the plurality of paths including a first path passing from the inverter through the stator and returning to the inverter, and a second path passing from the inverter through the shaft and returning to the inverter, and wherein a length of the first path is equal to or smaller than a length of the second path.