K. Sakai

Permanent magnet motors capable of pole-changing without changing the connection of the windings for high efficiency

K. Sakai, K. Matsuda, N. Yuzawa, 2015, 2015 IEEE International Electric Machines & Drives Conference (IEMDC).

Principle and basic characteristics of hybrid variable-magnetic-force motors

K. Sakai, S. Kuramochi, H. Hashimoto, 2011, Proceedings of the 2011 14th European Conference on Power Electronics and Applications.