Drive Motor Cooling Structure With Integrated Support Ring Channels
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Solution Overview
Problem
Existing cooling methods for drive motors in environmentally-friendly vehicles, such as the oil cooling type, have limitations in improving the performance and efficiency of heat dissipation, leading to potential damage and reduced motor efficiency due to indirect cooling.
Innovation Solution
A cooling apparatus with a ring-shaped support member that includes a channel for cooling oil flow and nozzle holes to directly spray oil onto the stator core and coil, combined with a guide on the bobbin to direct the cooling oil to the stator coil, enhancing direct cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If oil cooling is used with a support ring channel, then cooling function is provided, but cooling performance is limited due to indirect cooling
Solution Approach 1:
The support ring acts as an intermediary component that integrates both structural support and cooling functions. By forming channels directly in the support ring that contact the stator core, the cooling oil flows through an intermediate structure that is in direct thermal contact with the heat source, thereby improving cooling performance without requiring a separate cooling device.
Solution Approach 2:
The support ring is designed to perform multiple functions simultaneously: it provides mechanical support for the stator core and stator coil, maintains the air gap between stator and rotor, and serves as a cooling channel carrier. This multi-functionality improves cooling performance while avoiding additional complexity from separate cooling components.
2Loss of energy
If indirect cooling through support ring channel is used, then cooling function is achieved, but heat dissipation efficiency is insufficient
Solution Approach 1:
The support ring incorporates cooling channels at specific locations where heat generation is most intense. The channels are positioned to contact the stator core and stator coil directly, creating localized high-efficiency cooling zones where the cooling oil absorbs heat most effectively from the critical components.
Solution Approach 2:
The support ring serves as a thermal intermediary that directly contacts both the heat source (stator core and coil) and the cooling medium (cooling oil). This intermediary structure enables efficient heat transfer from the stator components to the cooling oil, significantly improving heat dissipation efficiency compared to indirect cooling methods.
3Temperature
If cooling oil flows through channel in support ring, then cooling is provided, but direct contact with stator components is insufficient
Solution Approach 1:
The cooling channels are merged directly into the support ring structure, combining the support function and cooling function in a single integrated component. The support ring simultaneously provides mechanical support and serves as the cooling oil passage carrier, enabling direct contact between cooling oil and stator components without requiring separate cooling channels or additional structural elements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for more efficient heat dissipation and improved motor performance by directly supplying cooling oil to the stator core and coil, enhancing the cooling efficiency of the drive motor.
Implementation Method 1
heat generated from the drive motor transfers to the support ring through the stator core and is dissipated through the support ring
Implementation Method 2
oil flows through a channel in the support ring
Implementation Method 3
nozzle holes for spraying the cooling oil to the stator core and a stator coil
Data Source
AI summary
A cooling structure of a drive motor may include a ring-shaped support member disposed on the inside of a housing and supporting the stator core of the drive motor, in which the support member may have a channel for cooling oil flow therein and nozzle openings for spraying the cooling oil to the stator core and a stator coil wounded around the stator core.