Motor Flow Rectification Face for Heat Dissipation Efficiency
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Solution Overview
Problem
In motors with a large gap between the heat dissipation section and the flange section, cooling air only hits the top side portion of the heat dissipation section, leading to reduced heat dissipation efficiency.
Innovation Solution
A motor design incorporating a flow rectification section with a cooling air flow rectification face that opposes the heat dissipation section at a close distance, integrated with the flange section, and a bulk reduction section to prevent sink marks during molding, along with an upstand wall portion to maintain airflow direction, enhancing heat exchange efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a large gap is present between the heat dissipation section and the flange section, then the structure is simpler and easier to manufacture, but the cooling air flow path becomes inefficient and heat dissipation efficiency decreases
Solution Approach 1:
The flow rectification section acts as an intermediary component between the cooling air flow path and the heat dissipation section. It redirects and concentrates the cooling air flow toward the heat dissipation section, ensuring efficient heat exchange while maintaining the structural simplicity and ease of manufacture of the original design.
2Loss of energy
If the flow rectification section is made larger to improve cooling air flow rectification, then heat dissipation efficiency improves, but the volume increases causing sink marks during molding
Solution Approach 1:
The flow rectification section is segmented into multiple functional regions: a cooling air flow rectification face for redirecting airflow, a bulk reduction section to prevent sink marks during molding, and an upstand wall portion to maintain airflow directionality. This segmentation allows each region to perform its specific function optimally without compromising the other.
Solution Approach 2:
Different regions of the flow rectification section are designed with different local properties: the cooling air flow rectification face has a specific geometry for flow redirection, the bulk reduction section has reduced volume to prevent sink marks, and the upstand wall portion has vertical structure to maintain airflow direction. This local quality optimization resolves the contradiction between heat dissipation efficiency and molding precision.
3Loss of energy
If cooling air flow path is extended to improve heat exchange, then heat dissipation efficiency improves, but the device complexity increases
Solution Approach 1:
The flow rectification section is integrally formed with the flange section, merging two components into one. This integration improves heat dissipation efficiency by providing flow rectification functionality while reducing device complexity by eliminating the need for separate assembly steps and reducing the number of parts.
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
The design improves heat dissipation efficiency by ensuring cooling air effectively contacts the heat dissipation section, reducing sink marks and simplifying the structure, while maintaining airflow directionality.
Implementation Method 1
The position of a cooling airflow is redirected toward the heat dissipation section by the cooling air flow rectification face, enabling the rate of contact between the cooling air and the heat dissipation section to be increased
Implementation Method 2
enabling efficient heat exchange between the cooling air and the heat dissipation section
Data Source
AI summary
A motor includes a holder having an annular plate shape with a plate thickness in an axial direction of a rotor housing, and including a flange section disposed so the rotor housing rotates at an inner side of the flange section, a center piece including a plate-shaped section opposing the flange section, and a heat sink including a heat dissipation section projecting from the plate-shaped section toward the flange section. The flange section integrates with a flow rectification section including a cooling air flow rectification face extending along a cooling air flow path between the flange section and the plate-shaped section. The heat dissipation section is disposed in the cooling air flow path. The cooling air flow rectification face closely opposes the top of the heat dissipation section. A bulk reduction section is between the cooling air flow rectification face and the flange section opposite of the plate-shaped section.