Insulated Stator Cooling Pipeline for Coil Heat Without Gap Interference
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Solution Overview
Problem
Motors experience temperature rises due to energy loss in coils, leading to potential burnout if not adequately cooled.
Innovation Solution
A motor cooling system featuring insulated cooling pipelines mounted within the stator housing, with the top surface flush or lower than the stator iron core to prevent coolant interference with the magnetic gap, and circulating cooling liquid to cool the coil through heat conduction, along with an iron core cooling passage to further manage temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling pipelines are mounted in the stator housing, then the coil cooling effect is improved, but the magnetic gap may be affected by coolant interference
Solution Approach 1:
An insulating layer is introduced as an intermediary between the cooling pipeline and the coil/stator components. This insulating layer prevents direct contact between the coolant and the magnetic components, eliminating coolant interference with the magnetic gap while maintaining effective thermal coupling for cooling purposes.
Solution Approach 2:
The cooling pipeline is designed with selective thermal properties - the insulating layer provides electrical and magnetic insulation where needed, while maintaining thermal conductivity for heat transfer. This local differentiation of material properties allows the system to simultaneously protect the magnetic gap integrity and achieve effective coil cooling.
2Temperature
If the top surface of the cooling pipeline is higher than the stator iron core, then coolant contact with the coil is improved, but the magnetic gap is compromised
Solution Approach 1:
The insulating layer serves as a mediator that enables the cooling pipeline to maintain proper height positioning without directly compromising the magnetic gap. It allows thermal contact for cooling while preventing magnetic field interference, resolving the conflict between cooling efficiency and magnetic gap integrity.
3Reliability
If insulated cooling pipelines are used, then magnetic gap integrity is maintained, but thermal conductivity may be reduced
Solution Approach 1:
The cooling pipeline structure employs local quality differentiation with insulating materials applied only where electrical and magnetic insulation is required, while maintaining thermally conductive pathways for heat transfer. This selective application of material properties preserves both magnetic gap integrity and thermal conductivity.
Solution Approach 2:
The cooling pipeline utilizes composite material construction combining insulating materials with thermally conductive materials. This composite structure provides both the necessary magnetic insulation to protect the gap integrity and sufficient thermal conductivity to maintain effective heat transfer from the coil.
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
Effectively cools the motor coil, preventing overheating and burnout while maintaining the magnetic gap integrity, thus enhancing motor reliability and performance.
Implementation Method 1
circulating cooling liquid to cool the coil through heat conduction
Data Source
AI summary
A motor cooling system, a motor stator and a disc motor. The motor cooling system comprises an insulated cooling pipeline (2); the insulated cooling pipeline is mounted on a stator housing, the top surface of the insulated cooling pipeline is lower than or flush with the top surface of a stator iron core, and the bottom surface of the insulated cooling pipeline touches a coil of the motor stator for use in cooling the coil; the top surface of the stator iron core is configured to being arranged relative to a rotor, so that a magnetic field generated by the coil can interact with a rotor permanent magnet. Since the outer bottom surface of the insulated cooling pipeline touches the coil of the motor stator, a liquid coolant in the insulated cooling pipeline can cool the coil by means of heat conduction.