A design method of full-order extended electromotive force observer for sensorless control of IPMSM. - Mutuwo Tomita; Masaru Hasegawa; Keiju Matsui (AMC, 2010)

Analysis and improvement of bilateral chopper having current resonant soft-switch. - Keiju Matsui; Susumu Tanaka; Masaru Hasegawa (ISCAS, 2010)

Discussions on various chopper circuits for power factor corrections. - Yuhta Ando; Keiju Matsui; Masaru Hasegawa (ISIE, 2013)

Various voltage equalizers for EDLCs using CW circuit. - Hlaing Kyi Pyar Khant; Kouhei Yamakita; Keiju Matsui; Masaru Hasegawa (ISIE, 2013)

Discussion on resonant converter employing zero current switch with saturable inductor. - Keisuke Kuwabara; Keiju Matsui; Takanori Asaba; Masaru Hasegawa (ISIE, 2013)

Simple and concise photovoltaic power generation system installed in veranda. - Keiju Matsui; Eiji Oishi; Mikio Yasubayashi; Yasutaka Kawata; Masayoshi Umeno; Hideo Uchida; Masaru Hasegawa (APCCAS, 2014)

Pursuit of simple power conditioner for photovoltaic small power generation. - Keiju Matsui; Eiji Oishi; Yasutaka Kawata; Mikio Yasubayashi; Masayoshi Umeno; Hideo Uchida; Masaru Hasegawa (IECON, 2015)

Proposal of novel inverter constructed by minimum circuit components. - Keiju Matsui; Eiji Oishi; Yasutaka Kawata; Mikio Yasubayashi; Masayoshi Umeno; Hideo Uchida; Masaru Hasegawa (GCCE, 2017)