27. Torque Ripple Improvement for Brushless DC Miniature Motors
(Yoshihiro Murai， Yoshihiro Kawase，Kazuharu Ohashi，Kazuo Nagatake and Kyugo Okuyama)
IEEE Trans. on Industry Applications, 25, 3, 441-450 (1989).
33. 電磁力及び表面張力を考慮した溶湯金属形状の数値解析
(河瀬順洋，村井由宏，林典史)
電子情報通信学会論文誌, J72-D-II, 271-278 (1989).
34. 単相交流電磁石の吸引力特性の解析
(河瀬順洋，村井由宏，伊藤昭吉)
電気学会論文誌, 109-D, 7, 500-506 (1989).
35'. Analysis of Attractive Force of Pull-Type Single Phase A.C. Electromagnets
( Yoshihiro Kawase and Shokichi Ito)
Conference on Computation of Electromagnetic Fields, 725-728 (1989).