Stator core, drive motor and vehicle
By designing oil inlet grooves and oil grooves in the stator core, the cooling medium flows in radially and is sprayed out axially, which solves the problem of poor cooling of the stator winding, improves the heat dissipation performance of the motor, and ensures stable operation at high speed and high torque density.
CN224289406UActive Publication Date: 2026-05-26XIAOMI EV TECH CO LTD
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Patent Information
- Application Number
- CN202520951401.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2026-05-26
- Estimated Expiration
- 2035-05-14
AI Technical Summary
Technical Problem
In the existing technology, the cooling effect of the stator winding located in the stator slot is not good, and it is difficult to meet the heat dissipation requirements under high speed, torque density and power density.
Method used
An oil inlet groove and an oil groove section are designed in the stator core. The cooling medium flows in radially and is sprayed out axially from the middle to both ends along the oil groove section, directly contacting the stator winding to achieve in-groove cooling.
Benefits of technology
The cooling effect of the stator winding is improved, the heat dissipation performance of the motor is enhanced, and the stable operation of the motor at high speed and high torque density is ensured.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224289406U_ABST
Abstract
This disclosure relates to a stator core, a drive motor, and a vehicle. The stator core has an oil inlet groove on its outer peripheral wall and a stator slot on its inner peripheral wall for accommodating stator windings. Each stator slot has a radially arranged main body and an oil groove portion located on one side of the main body and connected to it. The stator windings are placed within the main body. The oil groove portion is configured to communicate with the oil inlet groove, allowing cooling medium flowing into the oil inlet groove to be axially sprayed out from the center to both ends along the oil groove portion. In the stator core provided by this disclosure, an in-slot cooling scheme is employed, allowing the cooling medium within the oil groove portion to directly contact the stator windings within the main body, thus improving the cooling effect on the stator windings. Furthermore, considering that the oil inlet groove is located on the outer peripheral wall, and there is a height difference between the oil groove portion and the oil inlet groove in the radial direction, by connecting the oil inlet groove to the oil groove portion, the cooling medium flowing into the oil inlet groove can enter the oil groove portion and be axially sprayed out from the center to both ends along the oil groove portion, achieving in-slot cooling.
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