公开(公告)号：US20220255407A1

公开(公告)日：2022-08-11

申请号：US17708792

申请日：2022-03-30

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhenxing Chen ,  Guoquan Yu ,  Wenwu Ma ,  Chao Cao

IPC: H02K11/40 ,  H02K7/00 ,  B60K1/00

Abstract: This application provides a motor, a power assembly, and a motor drive device. In this application, the 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 connected to a rotating shaft and a housing. Because the grounding ring is made of a material with good conduction performance, a shaft induced voltage transmitted on the rotating shaft can be transmitted to the housing through the grounding ring, instead of being transmitted to the housing through a motor bearing, thereby avoiding bearing electric corrosion of the motor bearing.

公开(公告)号：US11863029B2

公开(公告)日：2024-01-02

申请号：US17645152

申请日：2021-12-20

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhiqi Wei ,  Chao Cao ,  Lang Lv ,  Wenwu Ma ,  Ke Wang

IPC: H02K11/40 ,  H02K5/15 ,  H02K5/173 ,  H02K7/00

CPC classification number: H02K11/40 ,  H02K5/15 ,  H02K5/1732 ,  H02K7/003

Abstract: Embodiments of this application provide a motor rotor, a motor, and a vehicle. A conductive pillar passes through an inner ring of a conductive bearing, an outer wall of the conductive pillar interference fits with the inner ring of the conductive bearing, and an end of the conductive pillar is grounded. In this way, it is ensured that a shaft current on a rotor body is discharged by using the conductive bearing and the conductive pillar, to prevent a main bearing of the motor rotor from being electrically corroded by the shaft current. In addition, the conductive bearing is sleeved on the grounded conductive pillar, so that the inner ring of the conductive bearing can interference fit with the outer wall of the conductive pillar.

公开(公告)号：US11888350B2

公开(公告)日：2024-01-30

申请号：US17680616

申请日：2022-02-25

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Ji Pang ,  Di Li ,  Lang Lv ,  Chao Cao

IPC: H02K1/16 ,  B60K1/00 ,  H02K15/02

CPC classification number: H02K1/165 ,  B60K1/00 ,  H02K15/024

Abstract: Embodiments of this application disclose a stator, a stator manufacturing method, a motor, and an electric vehicle. The stator includes: a stator tooth part, where a plurality of stator tooth parts are arranged at intervals along a circumferential direction; and a stator yoke part, where the stator yoke part is disposed along a circumferential direction of the stator tooth part, and the circumferential direction is a circumferential direction around a central axis of the stator; where the stator tooth part and the stator yoke part are integrally formed by an oriented silicon steel sheet, and a grain direction of the formed oriented silicon steel sheet points to the central axis of the stator along a radial direction. Therefore, the stator tooth part and the stator yoke part are formed by using one material, and there is no need to splice two materials, thereby reducing process costs.

公开(公告)号：US11909277B2

公开(公告)日：2024-02-20

申请号：US17708792

申请日：2022-03-30

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhenxing Chen ,  Guoquan Yu ,  Wenwu Ma ,  Chao Cao

IPC: H02K11/40 ,  B60K1/00 ,  H02K7/00

CPC classification number: H02K11/40 ,  B60K1/00 ,  H02K7/003

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.