Motor Heat Dissipation via Integrated Stator and Lateral Airflow
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Solution Overview
Problem
Conventional motors suffer from reduced heat transfer efficiency due to contact heat resistances between components and require additional space for inefficient cooling systems, which increases the overall volume without enhancing heat dissipation.
Innovation Solution
A motor design with a silicon steel sheet-stamped integrated structure for the motor housing and stator, eliminating contact heat resistances and utilizing independent airflow paths for enhanced heat dissipation, where the heat from the coil is directly conducted to the stator through hollowed-out areas and dissipated by strategically placed fans.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional motor design with separate housing and stator is used, then assembly flexibility is improved, but contact heat resistance increases and heat transfer efficiency decreases
Solution Approach 1:
The patent merges the housing and stator into a single integrated structure made from a single piece of silicon steel sheet through stamping. This eliminates the contact interface between separate housing and stator components, removing contact heat resistance and creating a direct thermal conduction path from the coil to the external environment through the integrated structure's hollowed-out areas.
2Temperature
If fan shroud and fan are added to the rear of motor, then heat dissipation capability is improved, but motor volume increases significantly
Solution Approach 1:
The patent transitions from rear-direction heat dissipation (adding fan shroud and fan at the back) to lateral-direction heat dissipation (using hollowed-out areas on the side surfaces of the integrated housing-stator structure). This dimensional change allows heat to be dissipated through the sides of the motor, eliminating the need for rear space-consuming cooling components while maintaining effective heat dissipation capability.
3Temperature
If multiple fans with independent airflow paths are used, then heat dissipation efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the heat dissipation function into multiple independent airflow paths, each with its own fan and corresponding hollowed-out area on the stator. This segmentation allows each fan to independently cool specific regions of the motor, improving overall heat dissipation efficiency while maintaining relatively simple individual airflow paths that do not interfere with each other.
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 design reduces material costs, increases heat transfer efficiency, and minimizes installation space while improving fan utilization and total heat-dissipating area, resulting in improved motor performance and reduced energy loss.
Implementation Method 1
the heat generated by the coil can be directly conducted to the stator
Implementation Method 2
the airflow driven by a fan
Data Source
AI summary
A motor comprises a stator, heatsinks, a rotor and a heat-dissipation device. The stator has a hollow portion, a coil portion and a housing portion having a first surface, a second surface and sidewalls. The hollow portion is penetrated through the housing portion. The coil portion is disposed between the hollow portion and the housing portion. The heatsinks are respectively disposed on different sidewalls. The heat-dissipation device comprises a wind-guiding cover and a first fan. The wind-guiding cover comprises a wind-guiding main board and wind-guiding lateral boards. The wind-guiding main board is disposed adjacent to the second surface. The wind-guiding lateral boards are vertically extended from different lateral edges of the wind-guiding main board towards the same direction. Each wind-guiding lateral board is disposed corresponding to one of the heatsinks, and at least one of the wind-guiding lateral boards has a hole. The first fan is received by the hole.