Successful development of a dual axial gap type high-speed induction motor!

[Call for Joint Development] A small high-power motor developed by Professor Masato Enokizono of the Vector Magnetic Properties Research Institute, capable of continuous operation at 10,000 RPM with a diameter of approximately 10 cm and air cooling.

On March 22, we introduce the "Induction Motor" featured in the newspaper. ▼ What is an "Induction Motor": It has a simple and robust structure, can withstand harsh environments, is low-cost, and requires no maintenance. However, its use in EVs necessitates larger sizes to produce high output, which leads to overheating, making long-duration operation challenging... Therefore, we successfully invented a practical 80μm steel plate! This demonstrates a new option that overturns the common belief that "induction motors are impossible!" ■ Utilized across multiple industries, simple and robust, resistant to harsh environments, low cost, maintenance-free ■ High output requires larger sizes; high output can also be achieved with small sizes through high-speed rotation, but heat generation in the iron core is an issue ■ Electromagnetic steel plates are currently around 300μm; thinning them suppresses heat generation, and we have invented a practical 80μm steel plate ■ Thin steel plates are difficult to laminate, so we will use a winding lamination approach for mass production. A dual-type that sandwiches the rotor from both sides further increases 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 ■ Challenges for high-speed operation include coil winding, processing ultra-thin electromagnetic steel plates, and achieving low friction in the rotating shaft. We aim for practical application through joint research with specialized technology manufacturers.

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