2013年12月13日 Development of Low Speed and High Efficiency Permanent Magnet Generators for Distributed Energy Sources International Symposium on EcoTopia Science 2013 (ISETS’13) K. Imai, T. Nakamura, T. Ogasa, T. Nishimura, H. Kikuchi, N. Amemiya, I. Takahata, Y. Kimura