Patent ID: 11909277
Assignee: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  F  Y | IPC B  H

Claim 17:
18. A motor drive device comprising:
an installation support; and
a power assembly installed on the installation support and comprising:
a motor comprising:
a housing comprising a space;
a rotating shaft;
a first sealing piece accommodated in the housing and configured to seal a first part of the space to obtain a sealing space;
a second sealing piece cooperating with the first sealing piece to seal the first part to form the sealing space; and
a grounding ring accommodated in and electrically coupled to the housing and the rotating shaft, wherein the grounding ring is a conductive structure, and wherein the grounding ring is located in the sealing space; and

a motor controller electrically coupled to the motor and configured to control the motor to work.