JAPAN: The high-efficiency IPM torque reluctance motor used in air conditioners has won the 18th Japan Electrotechnical Technology Foundation Prize in Electricity.
The rare earth magnet motor was developed by Daikin Industries and Osaka State University and is used by Daikin in residential and commercial air conditioners.
The Foundation of Electricity Prize is awarded for achievements in electrical engineering that have made a major contribution to society. It was established in 2008 by the Institute of Electrical Engineers of Japan as part of its 120th anniversary celebration.
In addition to recognition for its contribution to reducing energy consumption, the engine was praised for expanding the potential of energy-saving technologies beyond air conditioning systems and into other industries such as industrial equipment, hybrid vehicles and electric vehicles.
A permanent magnet motor consists of a magnet that rotates in the center and electromagnets around it. When electricity passes through the electromagnet coil, the magnets rotate due to the mutual attraction and repulsion forces between them.
Unlike conventional SPM motors, IPM motors have rare earth permanent magnets embedded in the rotor, providing stronger magnetic force. In addition, by changing the shape of the iron core, the resistance torque (rotational force caused by the attraction of the iron core) has been increased, providing higher torque and greater efficiency.
By combining the IPM motor with inverter control, it has been possible to improve efficiency and increase productivity with stable operation, which ensures both energy-saving operation and comfort.
https://www.coolingpost.com/world-news/daikin-motor-wins-technology-award/