1. Ibaraki University,Hitachi,Ibaraki,Japan,316-8511
2. Nippon Bunri University,Oita-City,Oita,Japan,870-0397
3. Vector Magnetic Characteristic Technical Laboratory,Usa,Oita,Japan,879-0442
4. Nippon Kinzoku Co. Ltd.,Tokyo,Japan,174-8560
5. Nippon Kinzoku Co. Ltd.,Japan,Tokyo
6. RWTH Aachen University,Institute of Electrical Machines (IEM),Aachen,Germany,52062