Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12413156 | Capacitor balancing control in an HVDC MMC | Shuhei Fujiwara, Yoshiyuki Kono, Ryosuke Uda, Toshiyuki Fujii, Shigeo Hayashi | 2025-09-09 |
| 12348127 | Power conversion device | Toshiyuki Fujii, Shuhei Fujiwara, Yoshiyuki Kono, Ryosuke Uda | 2025-07-01 |
| 12322969 | Power conversion system | Shuhei Fujiwara, Yoshiyuki Kono, Ryosuke Uda, Toshiyuki Fujii | 2025-06-03 |
| 12308763 | Power conversion device | Shuhei Fujiwara, Yoshiyuki Kono, Ryosuke Uda, Toshiyuki Fujii, Shigeo Hayashi | 2025-05-20 |
| 12273045 | Power conversion device with individual cell and arm balancing | Shuhei Fujiwara, Yoshiyuki Kono, Ryosuke Uda, Toshiyuki Fujii, Shigeo Hayashi | 2025-04-08 |
| 12255544 | Power conversion device that performs power conversion between DC circuit and AC circuit | Toshiyuki Fujii, Shuhei Fujiwara, Ryosuke Uda, Yoshiyuki Kono | 2025-03-18 |
| 12218606 | Power conversion device | Miwako TANAKA, Toshiyuki Fujii, Akito NAKAYAMA | 2025-02-04 |
| 12212251 | Power conversion device having converter cells connected in series in a multiplexed manner and each including an energy storage element | Akito NAKAYAMA, Takushi Jimichi | 2025-01-28 |
| 12199524 | Power conversion device that performs power conversion between DC circuit and AC circuit | Toshiyuki Fujii, Shuhei Fujiwara, Ryosuke Uda, Yoshiyuki Kono | 2025-01-14 |
| 12169227 | Testing device and testing method for power converters | Akito NAKAYAMA, Yuki Ishii | 2024-12-17 |
| 12166410 | Power conversion device | Akito NAKAYAMA, Miwako TANAKA | 2024-12-10 |
| 12081138 | Power conversion device | Toshiyuki Fujii, Shuhei Fujiwara, Ryosuke Uda, Yoshiyuki Kono | 2024-09-03 |
| 12081112 | Power conversion device | Toshiyuki Fujii, Shuhei Fujiwara, Ryosuke Uda, Shigeo Hayashi | 2024-09-03 |
| 12057787 | Power conversion device | Toshiyuki Fujii, Shuhei Fujiwara, Ryosuke Uda, 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 | Toshiyuki Fujii, Shuhei Fujiwara, Ryosuke Uda, Kazuyori TAHATA | 2024-06-18 |
| 12009759 | Power conversion system | Yoshiyuki Kono, Shuhei Fujiwara, Ryosuke Uda, Toshiyuki Fujii | 2024-06-11 |
| 11936306 | Power conversion device | Fuminori Nakamura, Takeshi Kikuchi, Daisuke YAMANAKA, Toshiyuki Fujii | 2024-03-19 |
| 11909307 | Power conversion device | Kazuyori TAHATA, Shuhei Fujiwara, Toshiyuki Fujii | 2024-02-20 |
| 11757377 | Power conversion device | Takato TOI, Toshiyuki Fujii | 2023-09-12 |
| 11750080 | Power conversion device | Toshiyuki Fujii, Shuhei Fujiwara, Ryosuke Uda, Kazuyori TAHATA | 2023-09-05 |
| 11532990 | Power conversion device that performs DC-to-DC conversion | Takaharu ISHIBASHI, Takushi Jimichi | 2022-12-20 |
| 11515778 | Power conversion device | Takaharu ISHIBASHI, Takushi Jimichi | 2022-11-29 |
| 11428748 | System and method for testing power conversion device | Takushi Jimichi, Takaharu ISHIBASHI | 2022-08-30 |
| 11336169 | Power conversion device | Toshiyuki Fujii, Shuhei Fujiwara, Ryosuke Uda, Kazuyori TAHATA | 2022-05-17 |
| 11316433 | Power conversion device including first and second bridge circuits | Takaharu ISHIBASHI, Takushi Jimichi | 2022-04-26 |