Issued Patents All Time
Showing 1–25 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12413156 | Capacitor balancing control in an HVDC MMC | Shuhei Fujiwara, Yoshiyuki Kono, Takuya Kajiyama, Toshiyuki Fujii, Shigeo Hayashi | 2025-09-09 |
| 12381397 | Power conversion system and control device for same | Takeshi Kikuchi, Fuminori Nakamura | 2025-08-05 |
| 12348127 | Power conversion device | Takuya Kajiyama, Toshiyuki Fujii, Shuhei Fujiwara, Yoshiyuki Kono | 2025-07-01 |
| 12322969 | Power conversion system | Shuhei Fujiwara, Yoshiyuki Kono, Takuya Kajiyama, Toshiyuki Fujii | 2025-06-03 |
| 12308763 | Power conversion device | Shuhei Fujiwara, Yoshiyuki Kono, Takuya Kajiyama, Toshiyuki Fujii, Shigeo Hayashi | 2025-05-20 |
| 12273045 | Power conversion device with individual cell and arm balancing | Shuhei Fujiwara, Yoshiyuki Kono, Takuya Kajiyama, Toshiyuki Fujii, Shigeo Hayashi | 2025-04-08 |
| 12255544 | Power conversion device that performs power conversion between DC circuit and AC circuit | Takuya Kajiyama, Toshiyuki Fujii, Shuhei Fujiwara, Yoshiyuki Kono | 2025-03-18 |
| 12199524 | Power conversion device that performs power conversion between DC circuit and AC circuit | Takuya Kajiyama, Toshiyuki Fujii, Shuhei Fujiwara, Yoshiyuki Kono | 2025-01-14 |
| 12081112 | Power conversion device | Takuya Kajiyama, Toshiyuki Fujii, Shuhei Fujiwara, Shigeo Hayashi | 2024-09-03 |
| 12081138 | Power conversion device | Takuya Kajiyama, Toshiyuki Fujii, Shuhei Fujiwara, Yoshiyuki Kono | 2024-09-03 |
| 12074535 | Control device and power conversion device | Takeshi Kikuchi, Shuhei Fujiwara, Yoshiyuki Kono | 2024-08-27 |
| 12068610 | Control device | Takeshi Kikuchi, Shuhei Fujiwara, Yoshiyuki Kono | 2024-08-20 |
| 12057787 | Power conversion device | Takuya Kajiyama, Toshiyuki Fujii, Shuhei Fujiwara, Yoshiyuki Kono | 2024-08-06 |
| 12015354 | Power conversion device capable of suppressing a harmonic component in an output voltage from an arm that increases after bypass of a failed converter cell | Takuya Kajiyama, Toshiyuki Fujii, Shuhei Fujiwara, Kazuyori TAHATA | 2024-06-18 |
| 12009759 | Power conversion system | Yoshiyuki Kono, Shuhei Fujiwara, Takuya Kajiyama, Toshiyuki Fujii | 2024-06-11 |
| 11750080 | Power conversion device | Takuya Kajiyama, Toshiyuki Fujii, Shuhei Fujiwara, Kazuyori TAHATA | 2023-09-05 |
| 11336169 | Power conversion device | Takuya Kajiyama, Toshiyuki Fujii, Shuhei Fujiwara, Kazuyori TAHATA | 2022-05-17 |
| 11309787 | Power conversion device | Yoshiyuki Kono, Shuhei Fujiwara, Shigeo Hayashi | 2022-04-19 |
| 11121637 | Power conversion device and power conversion system including a power converter capable of converting between alternating-current (AC) power and direct-current (DC) power | Takeshi Kikuchi, Toshiyuki Fujii | 2021-09-14 |
| 11031882 | Modular multilevel converter having capacitor degradation determination | Kazuyori TAHATA, Yoshiyuki Kono, Kenichi Kuroda, Shuhei Fujiwara | 2021-06-08 |
| 10855168 | Power conversion device having bypass circuit protection | Kenichi Kuroda, Masashi Kitayama, Yoshiyuki Kono, Shigeo Hayashi | 2020-12-01 |
| 10826378 | Power conversion apparatus for interconnection with a three-phrase ac power supply | Kaho MUKUNOKI, Toshiyuki Fujii, Taichiro Tsuchiya, Hisanori Taguchi, Ryota OKUYAMA | 2020-11-03 |
| 10673352 | Power conversion apparatus comprising cell blocks each including cascaded converter cells and a bypass circuit connected thereto | Kimiyuki Koyanagi | 2020-06-02 |
| 10637343 | Power conversion device for reliable control of circulating current | Toshiyuki Fujii, Takushi Jimichi | 2020-04-28 |
| 10560036 | Power conversion device for reliable control of circulating current while maintaining voltage of a cell | Toshiyuki Fujii, Takushi Jimichi | 2020-02-11 |