A small high-power 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 March 22nd edition of the Nikkan Kogyo Shimbun.
The development is centered around Professor Masato Enokizono (Specially Appointed Professor at Nippon Bunri University, Emeritus Professor at Oita University, and Visiting Professor at RWTH Aachen University), who devised the "Vector Magnetic Property Analysis" technology. *The article can be found at the following links:
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 across various industries; they are simple, robust, resistant to harsh environments, low-cost, and maintenance-free.
- Increasing output requires larger sizes, or high-speed rotation in smaller sizes, but heat generation in the iron core is a challenge.
- Currently, electromagnetic steel sheets are about 300μm thick; thinning them helps suppress heat generation, and this time we have invented practical 80μm steel sheets.
- Thin steel sheets are difficult to laminate, so we will mass-produce them using a winding lamination method. 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, necessitating a water cooling system. 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 involve coil winding, processing ultra-thin electromagnetic steel sheets, and low friction in the rotating shaft. We aim for practical application through joint research with specialized technology manufacturers.
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