Selectively Insulated Electromagnet Coil Winding
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Solution Overview
Problem
Existing electromagnets require excessive insulation, which increases manufacturing costs and reduces power output due to the additional distance between the wire and the magnetic core, and can lead to shorting issues with uninsulated wire.
Innovation Solution
A selectively insulated wire is wound around a magnetically susceptible core, ensuring that only coated surfaces contact uncoated surfaces to minimize insulation usage and prevent shorting, using a thin enamel coating on specific sections of the wire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wire insulation is used to prevent shorting, then reliability is improved, but manufacturing cost increases and power output decreases
Solution Approach 1:
The patent applies selective insulation where only specific surfaces of the wire are coated with insulating material. The wire has four outer surfaces, with two opposite surfaces coated with insulation and the other two surfaces left uncoated. This local differentiation allows the wire to prevent shorting where needed while maintaining electrical contact where required, resolving the contradiction between reliability and manufacturing cost.
2Reliability
If wire insulation is used to prevent shorting, then reliability is improved, but power output decreases due to increased distance between wire and magnetic core
Solution Approach 1:
By coating only two opposite surfaces of the wire with insulating material while leaving the other two surfaces uncoated, the patent enables the wire to maintain close contact with the magnetic core and adjacent wire turns. This selective insulation approach prevents shorting between layers while preserving the magnetic coupling and electrical continuity needed for high power output, thus resolving the contradiction between reliability and power.
3Ease of manufacture
If selective insulation is applied to wire surfaces, then manufacturing cost is reduced, but shorting prevention becomes more complex
Solution Approach 1:
The selective insulation pattern on the wire (two opposite surfaces coated, two surfaces uncoated) creates a straightforward winding methodology where uncoated surfaces naturally align with uncoated surfaces of adjacent turns. This geometric arrangement simplifies the winding process by providing inherent alignment guides, reducing the complexity of preventing shorting during assembly while maintaining cost advantages through reduced insulation material usage.
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 reduces the amount of insulation needed, lowering manufacturing costs and maintaining or improving power output by minimizing the spacing between wire turns, thus enhancing the performance of electromagnets.
Implementation Method 1
The basic principle of operation of an electromagnet is that an electric current applied to a conductor, usually a wire, will create a magnetic field
Implementation Method 2
a material of high magnetic permeability may be inserted as a core pole piece 23 of an electromagnet... The core pole piece 23 is typically made of soft iron and can increase the output of the electromagnet by more than a hundred fold
Data Source
AI summary
An electromagnet includes a magnetically susceptible pole piece. A wire is wound around the pole piece about an axis of the pole piece. The wire is selectively coated with insulating material at different sections thereof and wound in a manner where no section of wire having no insulating material coated thereon contacts another section of wire having no insulating material coated thereon. In one aspect there is a flat wire having four surfaces. In another aspect, the wire is circular or elliptical shape wire which is selectively insulated in a manner described.