Electric machines, powertrains and vehicles
CN224385278UActive Publication Date: 2026-06-19HUAWEI TECH CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUAWEI TECH CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-06-19
AI Technical Summary
Technical Problem
Shaft current corrosion can damage bearings, affecting motor reliability and lifespan, and existing technologies struggle to solve this problem effectively.
Method used
Introducing a grounded conductive plate between the stator winding and the rotor of the motor reduces the equivalent capacitance between the stator winding and the motor rotor, increases the impedance, and reduces the shaft voltage of the bearing, thereby reducing the possibility of shaft current and electro-corrosion.
Benefits of technology
It effectively reduces bearing shaft voltage, decreases motor failures, improves motor reliability and lifespan, and simultaneously reduces manufacturing difficulty and cost.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224385278U_ABST
Abstract
This application provides an electric motor, powertrain, and vehicle, relating to the field of motor technology, to address the problem of excessive shaft voltage between the inner and outer rings of a bearing. The motor stator includes a stator core and stator windings, with a central hole in the stator core for accommodating the motor rotor. The stator core includes multiple stator slots arranged circumferentially around the motor. These slots accommodate coils in the stator windings. At least one conductive plate is located between the stator windings and the rotor on the radial side of the motor, with one end of each conductive plate grounded. By using the conductive plate between the stator windings and the rotor, the relative area between them is reduced, thereby lowering the shaft voltage between the inner and outer rings of the bearing. This helps reduce the likelihood of bearing electro-corrosion and ensures the reliable operation of the motor.
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