A small high-output motor developed by Professor Masato Enokizono of the Vector Magnetic Characteristics Research Institute, capable of continuous operation at 10,000 RPM with a diameter of approximately 10 cm and air cooling.
Introduction of the article published in the Nikkan Kogyo Shimbun on March 22.
Development centered around Professor Masato Enokizono (Specially Appointed Professor at Nippon Bunri University, Emeritus Professor at Oita University, Visiting Professor at RWTH Aachen University) who devised the "Vector Magnetic Property Analysis" technology. *The article can be found below:
1) Vector Magnetic Property Technology Research Institute http://www.vector-magtec.jp/index.html
2) Mutec HP news https://www.mutec.org/
- Induction motors are used in various industries; they are simple, robust, resistant to harsh environments, low-cost, and maintenance-free.
- For high output, larger sizes are needed, and even small sizes can achieve high output with high-speed rotation, but heat generation in the iron core is an issue.
- Currently, electromagnetic steel sheets are about 300μm thick; thinning them helps suppress heat generation, and we have invented practical 80μm steel sheets.
- Thin steel sheets are difficult to laminate, so we will mass-produce them by winding and laminating. A dual-type rotor that sandwiches from both sides will further increase torque.
- EV synchronous motors generate a lot of heat in the coils, and magnets are sensitive to heat, requiring water cooling systems. The developed induction motor uses air cooling, and low output can be integrated into four wheels.
- A new choice that overturns the common belief that "induction motors are impossible!" The challenges of increasing speed include coil winding, processing ultra-thin electromagnetic steel sheets, and low friction for the rotating shaft. We aim for practical application through joint research with manufacturers specializing in these technologies.
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