Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10291159 | Control system, controller, and control method for wound induction machine | Ryuta Hasegawa, Takahisa Kageyama, Kiyoshi Kusunoki, Yuichi Shiozaki, Takashi Fujita +1 more | 2019-05-14 |
| 9887617 | Power conversion device and control method thereof | Ryuta Hasegawa, Shinya Kono, Takashi Fujita | 2018-02-06 |
| 9780692 | Control device of neutral-point-clamped power converter apparatus, and control method of neutral-point-clamped power converter apparatus | Ryuta Hasegawa, Takashi Fujita | 2017-10-03 |
| 9548685 | Over-voltage prevention device and current rectifying circuit | Ryuta Hasegawa, Takashi Fujita, Takahisa Kageyama, Yutaro Kitamori, Sho Sato | 2017-01-17 |
| 9478972 | Over-voltage prevention device | Yutaro Kitamori, Takahisa Kageyama, Takashi Fujita | 2016-10-25 |
| 9429136 | Control system of variable speed pumped storage hydropower system and method of controlling the same | Kiyoshi Kusunoki, Yuichi Shiozaki, Tadahiro Yanagisawa | 2016-08-30 |
| 9374030 | Generator excitation apparatus and power conversion system | Katsuhisa Inagaki, Kentaro Suzuki, Ryuta Hasegawa, Kiyoshi Kusunoki | 2016-06-21 |
| 9300185 | Flywheel power generating facility and method of operating same | Yoshitaka Arihara, Takahisa Kageyama | 2016-03-29 |
| 9287797 | Electric power converting device and electric power converting method | Ryuta Hasegawa, Yosuke Nakazawa, Kentaro Suzuki, Katsuhisa Inagaki | 2016-03-15 |
| 9077268 | Controller and variable-speed generator-motor starting method | — | 2015-07-07 |