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 19:
20. The motor drive device of claim 18, wherein the rotating shaft comprises an axial cavity comprising a first opening, and wherein the motor further comprises a conductive pillar comprising:
a first end extending into the axial cavity through the first opening, wherein the first end is fastened and electrically coupled to the rotating shaft; and
a second end located opposite to the first end, wherein the first sealing piece and the grounding ring are annular and are sleeved on the second end,
wherein the first sealing piece comprises:
a first side facing away from the first end; and
a first inner ring surface that is in contact with the conductive pillar,
wherein the grounding ring comprises a second inner ring surface that is in contact with the conductive pillar, and
wherein the grounding ring is located on the first side.