Rotor Connecting Member With Magnetized Filler Ends for Heat Dissipation
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Solution Overview
Problem
The existing rotor configurations with thermally conductive fillers between permanent magnets and rotor cores suffer from reduced heat dissipation due to the presence of connecting members, which impede direct heat transfer, leading to compromised cooling performance.
Innovation Solution
A rotor design featuring connecting members with thermally conductive fillers where only the ends of the fillers are magnetized and in contact with either the rotor core or the permanent magnet, allowing for improved heat dissipation by orienting the fillers in a heat dissipation direction and ensuring direct contact for enhanced thermal conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If connecting members are used to connect permanent magnets to the rotor core, then the permanent magnets are securely fixed, but the heat dissipation performance is reduced due to the presence of non-thermally conductive materials in the connecting members
Solution Approach 1:
The connecting member is constructed as a composite structure combining a magnetic base material (providing mechanical strength and magnetic properties) with a thermally conductive filler (providing heat dissipation). This composite approach allows simultaneous achievement of secure fixation and effective thermal management.
Solution Approach 2:
The thermal conductivity parameter of the connecting member is enhanced by incorporating thermally conductive fillers. This parameter change transforms the connecting member from a purely mechanical component into a component that simultaneously performs mechanical fixation and thermal conduction functions.
2Temperature
If thermally conductive fillers are added to connecting members, then heat dissipation is improved, but the magnetic properties and orientation precision are reduced
Solution Approach 1:
The thermally conductive filler is distributed within the connecting member matrix rather than uniformly throughout. This local quality approach allows the filler to provide thermal conduction where needed while the magnetic base material maintains its magnetic properties and enables precise orientation through magnetic alignment.
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 significantly enhances the cooling performance of permanent magnets by improving thermal conductivity and reducing demagnetization, while maintaining magnetic properties that allow for precise orientation and contact with rotor components.
Implementation Method 1
only ends of the filler having magnetism and a portion of the filler other than the ends being made of a non-magnetic material
Implementation Method 2
the connecting member contains a thermally conductive filler in order to efficiently transfer heat generated in the permanent magnet to the rotor core
Data Source
AI summary
A rotor includes: a rotor core in a shape of a shaft; a permanent magnet; and a connecting member interposed between the rotor core and the permanent magnet and connecting the permanent magnet to the rotor core. The connecting member contains a thermally conductive filler made of a non-magnetic material. Only ends of the filler have magnetism, and the ends are in contact with either or both of the rotor core and the permanent magnet.