Rotating Electric Machine Cooling Device Tilted End-Face
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Solution Overview
Problem
Conventional rotating electric machines require larger sizes and increased volume for enhanced heat exchange performance, leading to increased weight and reduced efficiency when cooling devices cannot be enlarged.
Innovation Solution
The rotating electric machine incorporates a cooling device design where the end-face portions are tilted with respect to the inflow and outflow directions of the cooling fluid, allowing for increased heat exchange performance without enlarging the frame's internal flow-path, resulting in a smaller and lighter cooling system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cooling device is enlarged to enhance heat exchange performance, then the heat exchange performance is improved, but the size and weight of the rotating electric machine increase
Solution Approach 1:
The end-face portions of the cooling device are tilted at specific angles (first angle and second angle) relative to the minimum-width direction of the frame's internal flow-path, creating an asymmetric configuration that optimizes fluid flow and heat exchange efficiency without requiring increased device size
Solution Approach 2:
The cooling device utilizes the tilt angle dimension to enhance heat exchange performance. By tilting the end-face portions in the axial direction rather than simply enlarging the device in radial or axial dimensions, the patent achieves improved heat exchange without increasing overall size or weight
2Reliability
If the frame's internal flow-path area is increased to improve cooling, then the heat exchange performance is improved, but the overall size of the rotating electric machine increases
Solution Approach 1:
The patent changes the geometric parameters of the cooling device by introducing tilt angles for the end-face portions. This parameter modification optimizes the flow characteristics and heat exchange efficiency within the existing frame volume, avoiding the need to increase the frame's internal flow-path area
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 configuration enhances heat exchange performance while reducing the overall size and weight of the rotating electric machine, achieving efficient cooling without the need for larger dimensions.
Implementation Method 1
a cooling device placed in the frame's internal flow-path, for cooling a cooling fluid sealed in the frame's internal flow-path
Data Source
Figure 1(a)~1(b)
Figure 2(a)~2(b)
Figure 3(a)~3(b)
AI summary
A cooling device mounted in the interior of a frame of a rotating electric machine is configured in such a manner that at least one of the end-face portions between a first end-face portion through which a cooling fluid flows into the cooling device and a second end-face portion from which the cooling fluid flows out thereof is placed tilting with respect to a minimum-width's direction of a frame's internal flow-path in vicinity to the cooling device, or with respect to at least one of an inflow direction and outflow direction of the cooling fluid.