Fiber-Reinforced Magnetizing Coil Structure Against Deformation
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Solution Overview
Problem
The deformation of coils due to electromagnetic forces during the magnetization process in PM motors makes it difficult to properly magnetize the permanent magnets, leading to reduced durability and efficiency.
Innovation Solution
A magnetizing device with a coil unit that includes a support and a fiber reinforced resin wound around the coil to prevent deformation, ensuring the coil remains stable during magnetic field generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coil is used to generate a magnetic field for magnetizing permanent magnets, then the magnetization process can be performed, but the coil deforms due to electromagnetic force acting on it, making it difficult to magnetize the magnetic bodies properly
Solution Approach 1:
The patent applies a flexible resin layer coating the coil to prevent deformation. The resin layer acts as a flexible protective shell that constrains the coil's radial expansion while allowing the coil to maintain its functional flexibility for generating the magnetic field. This resolves the contradiction by providing mechanical support without compromising the coil's electromagnetic functionality.
Solution Approach 2:
The patent uses a composite structure combining the coil (conductive material) with a resin layer (polymer material). This composite construction integrates the electromagnetic functionality of the coil with the mechanical support properties of the resin, creating a unified structure that resists deformation while maintaining electrical and magnetic performance.
2Duration of action of stationary object
If the coil is constrained to prevent deformation, then durability is improved, but the magnetic field generation may be affected
Solution Approach 1:
The resin layer is designed as a flexible coating that provides mechanical support to prevent coil deformation and improve durability, while its flexibility ensures it does not significantly impede the magnetic field generation. The thin film structure allows magnetic field lines to pass through with minimal interference.
Solution Approach 2:
The resin layer is applied specifically to the coil's outer surface where deformation occurs, providing localized mechanical support exactly where needed. This localized approach prevents interference with the coil's internal electromagnetic structure and magnetic field generation while still providing the necessary structural support for durability.
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 durability of the coil unit is improved, and the magnetic field is unaffected, allowing for efficient and reliable magnetization of the magnetic bodies without increasing the gap between the coil and rotor.
Implementation Method 1
an electric current is made to flow through the coil to generate a magnetic field around the coil, and the magnetic field magnetizes a magnetic body
Implementation Method 2
because of a magnetic field generated by one coil side and an electric current flowing through another coil side facing the one coil side across the central axis of the coil, an electromagnetic force acts on the other coil side
Data Source
AI summary
A magnetizing device includes at least one coil unit that generates a magnetic field. The coil unit includes a support, a coil wound around an outer circumferential surface of the support, and a fiber reinforced resin. The fiber reinforced resin is wound around the coil to prevent deformation of the coil in a direction away from a central axis of the coil.