Irreversible Demagnetization Improvement Process of Hybrid Traction Motors with Dy-Free Magnets

Development of Traction Drive Motors for the Toyota Hybrid System

In terms of preventing global warming and conserving natural resources, automobiles are playing an increasingly critical role. To reduce the CO2 produced by automotive vehicles, fuel efficiency must be improved while cleaning exhaust gases as well as ensuring safety. At Toyota Motor Corporation, solving environmental issues has been being one of our most important tasks, and this focus enabled ...

Radiation-Induced Demagnetization of Nd-Fe-B Permanent Magnets

Introduction The Advanced Photon Source (APS), as well as other third-generation synchrotron light sources, uses permanent magnets in the insertion devices to produce x-rays for scientific research [1,2]. When placed in a high-energy storage ring, these permanent magnets are subjected to irradiation from synchrotron radiation, high-energy bremsstrahlung, and bremsstrahlung-produced neutrons. Pr...

Analysis Technique for Improving Coercivity of Nd-Fe-B Magnets and Development of Dy-free Magnet

Hiroyuki Yamamoto, Dr. Eng. Isao Kitagawa, Dr. Sc. Teruo Kohashi, Dr. Sc. Akira Sugawara, Dr. Eng. Takeshi Nishiuchi, Dr. Eng. OVERVIEW: Hitachi is working to improve the performance of the NdFe-B magnets that help make people’s way of life more energy efficient and reduce the load it places on the environment. To study the factors that govern coercivity, an important parameter of magnet perfor...

User Manual: Permanent Magnets Electric Motors

Sintering of Nd-Fe-B Magnets from Dy Coated Powder

High-coercive (Nd,Dy)-Fe-B magnets were fabricated via dysprosium coating on Nd-Fe-B powder. The sputtering coating process of Nd–Fe–B powder yielded samples with densities greater than 98%. (Nd,Dy)2Fe14B phases may have effectively penetrated into the boundaries between neighboring Nd2Fe14B grains during the sputtering coating process, thereby forming a (Nd,Dy)2Fe14B phase at the grain boundar...