Permanent magnet synchronous motor: High efficiency rotation / miniaturization
Conscious arrangement of magnets : Taiyo Electric Engineering starts receiving order.
[Yokohama] Taiyo Denki Engineering Co., Ltd. (Kawasaki City Sati Ward, President Kenji Imanishi, 044-281-7470) has developed the Halbach field PM (Permanent synchronous Magnets) motor and started receiving orders which improves the efficiency of rotation by devising the arrangement of magnets. The motor is smoother than the internal permanent synchronous magnet (IPM) motor, which is mainly used in the field of industrial equipment. And this motor can be downsized about 20% compared to the IPM motor. The company aims to promote its use in machine tools and medical devices.The price of the motor is estimated individually. The company is proposing this motor for a wide range of fields such as precision measurement equipment, flying robots (drone), and submarines. And, it aims to sell 500million yen in 2024.
The new motor is based on a coreless permanent magnet synchronous motor (PMSM) with no iron core inside the coil, and the magnets are arranged in the Halbach arrangement. The general magnet arrangement is characterized in that the magnetic field spreads on both sides of the magnets, whereas the Halbach arrangement is characterized in that the magnetic field is concentrated in one direction. Arranging them in two rows increases the magnetic flux density, so it realizes smooth rotation and enables high-speed output. It can be made smaller than the conventional IPM motor, which will lead to the miniaturization of equipment incorporating the motor.
Taiyo Denki Engineering Co., Ltd. handles various motors and generators. Currently, in cooperation with Aero Develop Japan (ADJ, Chuo-ku, Tokyo), which is developing engines for drones, it is promoting the development of hybrid engines for large-size drones combining turbine engines and Halbach generators and motors. It will further improve the new motor and aim to develop the same engine this year.
