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US 11,909,277 B2Granted
Motor, power assembly, and motor drive device
AssigneeHuawei Digital Power Technologies Co., Ltd.
InventorsZhenxing Chen, Guoquan Yu, Wenwu Ma, Chao Cao
Life of this patent
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Abstract
A motor includes a grounding ring and a first sealing piece, or includes a grounding ring, a first sealing piece, and a second sealing piece. The grounding ring is electrically coupled to a rotating shaft and a housing. The grounding ring is made of a material with good conduction performance, hence, a shaft induced voltage transmitted on the rotating shaft is transmitted to the housing through the grounding ring, instead of being transmitted to the housing through a motor bearing.
Claims20
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 first conductive structure, and
- wherein the grounding ring is located in the sealing space.
5 more elements
A power assembly 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.
6 more elements
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.
9 more elements
Dependencies are inferred from the claim text.