Electric Motor Frame Insulation for Heat and Rust Suppression
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Solution Overview
Problem
Existing electric motors face temperature increase issues in the frame due to heat transfer from the stator core, leading to potential rust formation at the interface between the stator and frame, which existing groove configurations fail to adequately address.
Innovation Solution
Incorporating a tubular frame with grooves on either the inner peripheral surface of the frame or the outer peripheral surface of the stator, filled with an insulating member to prevent heat transfer and reduce rust occurrence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If grooves are formed in the inner peripheral surface of the frame to reduce heat transfer, then frame temperature increase is suppressed, but rust occurs on the outer peripheral surface of the stator and inner peripheral surface of the frame
Solution Approach 1:
An insulating member (resin or rubber material) is introduced as an intermediary substance to fill the groove between the stator and frame. This intermediary layer simultaneously provides thermal insulation to suppress frame temperature increase and acts as a protective barrier to prevent rust on both the stator outer peripheral surface and frame inner peripheral surface that face the groove
Solution Approach 2:
The groove depth is controlled to be 0.5mm to 2mm, creating an optimized parameter balance. This depth is sufficient to reduce heat transfer area and suppress frame temperature increase, while being shallow enough to allow effective filling with insulating material that prevents rust formation on the exposed surfaces
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 insulating member effectively suppresses frame temperature increases and prevents rust on both the frame and stator surfaces, while maintaining structural integrity and minimizing magnetic field interference.
Implementation Method 1
the insulating member that is disposed in the groove included in (i) the inner peripheral surface of the frame or (ii) the outer peripheral surface of the stator prevents transfer of heat from the stator to the frame
Data Source
AI summary
An electric motor includes a shaft that is rotatably supported for rotation around a rotation axis, a rotor that is located outwardly of the shaft in a radial direction and rotates integrally with the shaft, a stator that faces the rotor in the radial direction, and a tubular frame that has an inner peripheral surface to which the stator is fixed. The electric motor further includes a groove included in (i) the inner peripheral surface of the frame or (ii) an outer peripheral surface of the stator, and an insulating member disposed in the groove.