Motor Stator Varnish Application Using Compression and Capillary Action
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Solution Overview
Problem
The challenge in maintaining electric motor components is ensuring effective varnish application to enhance corrosion and contaminant resistance, while minimizing varnish consumption and improving capillary action within the motor's complex structure.
Innovation Solution
A method and system for applying varnish to electric motors involves compressing the stator using end plates and a screw mechanism, reducing spaces between laminates to enhance capillary action, and using a varnish injector to apply varnish to gaps between the stator, insulating layer, and wires, with a spacer to manage uneven surfaces and optimize varnish deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If varnish is applied to electric motor components, then corrosion and contaminant resistance is improved, but varnish consumption increases
Solution Approach 1:
The stator is compressed before varnish application to close gaps and spaces between laminates. This preliminary compression ensures that when varnish is applied, it cannot escape into unwanted areas, thereby reducing overall varnish consumption while still providing adequate protection to the motor components.
Solution Approach 2:
The invention utilizes the porous structure created by the spaces between laminates and gaps in the stator. By compressing these structures beforehand, the varnish can penetrate more effectively into the intended areas through capillary action, reducing the total amount of varnish needed while ensuring thorough coverage and protection.
2Reliability
If varnish is applied to gaps between stator, insulating layer, and wires, then protection is improved, but manufacturing complexity increases
Solution Approach 1:
The stator compression is performed as a preliminary step before varnish application. This pre-compression simplifies the subsequent varnish application process by creating a more uniform and accessible surface, reducing the complexity of the overall manufacturing process while ensuring better protection.
Solution Approach 2:
The compression mechanism acts as an intermediary step that facilitates the varnish application process. By temporarily altering the stator structure through compression and then releasing it, the system enables more effective varnish penetration into gaps without requiring complex direct application mechanisms, thereby reducing overall manufacturing complexity.
3Reliability
If spaces between laminates are reduced, then capillary action is improved, but compression force requirements increase
Solution Approach 1:
The compression is applied periodically or in stages rather than continuously at maximum force. The stator is compressed to reduce spaces between laminates, allowing capillary action to improve, then the compression is released. This periodic application achieves the desired capillary effect while distributing the force requirements over time, reducing peak force demands.
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 approach ensures efficient varnish application, reducing consumption and improving protection of motor components by ensuring consistent varnish distribution across the motor's structure, thereby extending the operational lifetime and reliability of electric propulsion systems.
Implementation Method 1
reducing spaces between laminates to enhance capillary action
Implementation Method 2
applying varnish to gaps between the stator, insulating layer, and wires
Data Source
AI summary
A varnish application system includes an electric motor, a clamp, and a varnish injector. The clamp includes a beam, a first end plate fixed to the beam and engageable to a first end of the electric motor, and a second end plate releasably connected the beam and engageable to a second end of the electric motor. The varnish injector is arranged to apply varnish to the electric motor when the clamp engages the electric motor.