Patent ID: 8198847
Filing Date: 2012-06-12
Classification: H02M,H02P

Abstract:
1. A brushless motor system, comprising: a brushless motor enclosed by a first metal housing; an inverter that is electrically coupled to drive said brushless motor through three motor power lines connected to motor windings in said brushless motor, and includes an inverter circuit enclosed by a second metal housing; a noise return line for returning a noise current from said brushless motor to said inverter, wherein said noise return line is bundled together with said three motor power lines by a binding material, and said second metal housing is electrically connected to ground independently of said electrical connection between said first metal housing and ground; a first line for receiving electric power source from a first terminal of a direct current power source which has a second terminal electrically connected to ground; a second line that is electrically connected to ground, for connecting to said second terminal via ground; and a conductor electrically connecting between said second line and said second metal housing; wherein the first line and the second line are located in the second metal housing; and wherein the noise return line is connected electrically between the first metal housing of the brushless motor and the second line in the second metal housing of the inverter.