Electric machine and method for operating the electric machine
By employing a dual coolant flow path design in the motor and switching cooling modes according to load conditions, efficient cooling of the motor stator is achieved, thereby improving the continuous power density and overall efficiency of the motor.
CN116155030BActive Publication Date: 2026-07-17DR ING H C F PORSCHE AG
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- DR ING H C F PORSCHE AG
- Filing Date
- 2022-11-22
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing motor stator cooling technologies are insufficient to effectively improve continuous power density under different load conditions.
Method used
The system employs a dual coolant flow path design, using the recesses in the stator windings and the channels in the stator laminations for direct and indirect cooling respectively. The coolant flow path is switched according to the motor's operating point by an adjustment device, thereby achieving direct cooling under high load and indirect cooling under low load.
Benefits of technology
Improving stator cooling under high load increases the continuous power density of the motor, while reducing the energy consumption of the cooling system under low load improves the overall efficiency and range of the motor.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN116155030B_ABST
Abstract
The invention relates to an electric machine (10) having a rotor (11) comprising a rotor shaft (12) and a rotor lamination stack (13), a stator (14) comprising a stator lamination stack (15) having recesses (17) and stator windings (18) arranged in the recesses of the stator lamination stack, the recesses accommodating the stator windings being flowable through by a coolant such that the stator windings are directly coolable by the coolant, wherein channels (23) are arranged in the stator lamination stack at a distance from the recesses accommodating the stator windings, the channels being flowable through by the coolant such that the stator windings are indirectly coolable by the coolant flowing through the channels, a device (25) by means of which the coolant flow through the recesses accommodating the stator windings and through the channels can be set depending on the operating point of the electric machine such that, in a first operating point, the coolant can only be conducted through the recesses accommodating the stator windings and, in a second operating point, the coolant can at least be conducted through the channels. The invention also relates to a method for operating an electric machine.
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