Rotor Magnetization Coil Sealing to Prevent Resin Cracking
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Solution Overview
Problem
Existing magnetization devices suffer from reduced efficiency and effectiveness due to the separation of the magnetization coil from the rotor's inner periphery, leading to resin cracking from vibration and heat generation.
Innovation Solution
A magnetization device with a core surrounding the rotor, a coil accommodated in a slot portion with an opening on the inner periphery, sealed with resin and closed by a sealing member to prevent resin exposure, enhancing coil proximity to the rotor and improving magnetization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the slot portion has an opening on the inner peripheral side of the core member to bring the coil closer, then magnetization efficiency is improved, but the resin thickness is reduced causing cracks
Solution Approach 1:
The slot portion is divided into two functional zones: a first slot portion with an opening on the inner peripheral side for accommodating the coil and improving magnetization efficiency, and a second slot portion without an opening that provides structural support and prevents resin cracking. This segmentation allows each zone to fulfill its specific function without compromising the other.
Solution Approach 2:
Different structural characteristics are applied to different regions of the slot portion. The first slot portion has an opening to enable close coil placement for efficient magnetization, while the second slot portion maintains a closed structure to ensure resin integrity and prevent cracking under thermal and mechanical stress.
2Device complexity
If the magnetization coil is separated from the rotor with a predetermined distance, then the coil structure is simpler, but magnetization effect and efficiency are reduced
Solution Approach 1:
The slot portion is segmented into a first slot portion with an opening that allows the coil to be positioned close to the rotor inner periphery, eliminating the need for a predetermined separation distance while maintaining structural simplicity.
Solution Approach 2:
The slot portion extends in the radial direction toward the rotor, allowing the coil to be positioned closer to the rotor by utilizing the radial dimension rather than maintaining a fixed axial separation distance.
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 configuration suppresses resin cracking and enhances magnetization effectiveness by bringing the coil closer to the rotor, improving magnetic field strength and efficiency.
Implementation Method 1
a coil for supplying a magnetic field for magnetizing the magnet of the rotor
Data Source
AI summary
The present invention provides a magnetization device capable of suppressing the occurrence of cracks in a resin sealing a coil and improving the effect and efficiency of magnetization, and the magnetization device is to magnetize a magnet disposed on a rotor of a motor, the magnetization device includes a core surrounding a periphery of the rotor, a coil for supplying a magnetic field for magnetizing the magnet of the rotor, a slot portion formed on an inner peripheral side of the core and having an opening for accommodating the coil, a resin for sealing the coil accommodated in the slot portion, and a sealing member provided to close the opening so that the resin is not exposed to the inner peripheral side.