| 2019 | IECON | Electrolytic Capacitor-Less Dual Inverter-Fed IPMSM for Constant Torque and High Power Factor. | Motoki Nishio, Hitoshi Haga |
| 2018 | IECON | Motor Current Regulation Based Direct DC-link Current Control of Wide Range Load Condition for IPMSM Drive System Without Passive Component. | Kodai Abe, Kiyoshi Ohishi, Hitoshi Haga, Yuki Yokokura |
| 2018 | IECON | Control method of energy storage system to increase output power from power conditioning systems (PCS). | Mikiya Ishibashi, Hitoshi Haga, Kenji Arimatsu, Koji Kato |
| 2016 | IECON | Harmonic current reduction control of IPMSM drive inverter without inductor or electrolytic capacitor. | Kodai Abe, Kiyoshi Ohishi, Hitoshi Haga, Yuki Yokokura |
| 2015 | IECON | Fine current harmonics suppression control for the input current of electrolytic capacitor-less inverter for IPMSM. | Kodai Abe, Kiyoshi Ohishi, Hitoshi Haga |
| 2015 | IECON | Current control system based on repetitive control and disturbance observer for single-phase five-level inverter. | Hitoshi Haga, Kenta Sayama, Kiyoshi Ohishi, Takayuki Shimizu |
| 2015 | IECON | Fine motor current control based on new current reconstruction method using one DC-link current sensor. | Kei Matsuura, Kiyoshi Ohishi, Hitoshi Haga, Itaru Ando |
| 2015 | IECON | Stationary reference frame sensorless vector control based on primary flux linkage and sinusoidal complete tracking current controller for IPMSM. | Ryota Takahashi, Kiyoshi Ohishi, Hitoshi Haga, Yuki Yokokura |
| 2014 | IECON | Realization of IPMSM drive systems without both an electrolytic capacitor and an line inductor. | Kodai Abe, Kiyoshi Ohishi, Hitoshi Haga |
| 2014 | IECON | Robust and fine sinusoidal voltage control of self-sustained operation mode for photovoltaic generation system. | Kenta Sayama, Shohei Anze, Kiyoshi Ohishi, Hitoshi Haga, Takayuki Shimizu |
| 2013 | IECON | Current harmonics reduction method of electrolytic capacitor-less diode rectifier using inverter-controlled IPM motor. | Toshio Hiraide, Kodai Abe, Kiyoshi Ohishi, Hitoshi Haga |
| 2012 | IECON | Reduction in current harmonics of electrolytic capacitor-less diode rectifier using inverter-controlled IPM motor. | Hiroaki Utsugi, Kiyoshi Ohishi, Hitoshi Haga |