Rotating Electrical Machine Cooler for Stator and Semiconductor
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Solution Overview
Problem
The existing rotating electrical machine systems are inefficient in cooling the stator of the motor, as cooling passages are not disposed below the inverter device, limiting motor output based on operating state.
Innovation Solution
A rotating electrical machine system with a cooler positioned between the semiconductor module and the stator, utilizing a cooling path around the stator and a cooler with internal flow paths to efficiently cool both the semiconductor module and the stator using shared coolant, without increasing the system's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling passages are disposed below the inverter device, then the stator can be cooled, but the system size increases
Solution Approach 1:
The cooler is designed as a multi-functional component that simultaneously cools the semiconductor module and the stator without requiring additional space. By positioning the cooler between the bottom portion of the second chamber and the stator, and designing it with both internal flow paths and external cooling surfaces, the same cooler structure serves dual cooling purposes, avoiding the need for separate cooling passages that would increase system volume.
Solution Approach 2:
The patent combines the cooling functions and physical structures into a single integrated cooler unit rather than using separate cooling systems. This merging approach allows the cooler to address both semiconductor module and stator thermal management needs within the existing system footprint, eliminating the volume increase that would result from adding separate cooling passages.
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
Ensures effective cooling of both the semiconductor module and the stator, enhancing motor output and operational longevity without enlarging the system's footprint.
Implementation Method 1
a cooler disposed between a bottom portion of the second chamber and the semiconductor module to cool the semiconductor module and the stator by coolant that passes through an inside of the cooler
Data Source
AI summary
A rotating electrical machine system integrally includes a rotating electrical machine housed in a first chamber of a housing and a semiconductor module housed in a second chamber of the housing and electrically coupled to the rotating electrical machine. The rotating electrical machine includes a stator secured to an inner circumference surface of the first chamber and a rotor rotatably disposed with respect to the stator. The rotating electrical machine system further includes a cooler disposed between a bottom portion of the second chamber and the semiconductor module to cool the semiconductor module and the stator by coolant that passes through an inside of the cooler.