Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10763848 | Gate drive circuit | Sho Takano | 2020-09-01 |
| 10700630 | Inverter that adjusts voltage command values and control method of inverter | Akio Toba, Akihiro Odaka | 2020-06-30 |
| 7180259 | Driving apparatus for driving multiple induction motors | Yasushi Matsumoto | 2007-02-20 |
| 6404162 | Variable-speed controlling device for use with an induction motor | Hirokazu Tajima, Shinichi Ishii | 2002-06-11 |
| 6377018 | Speed sensorless vector control apparatus | Hirokazu Tajima | 2002-04-23 |
| 6259611 | PWM power converter | Junichi Ito, Shinichi Ishii | 2001-07-10 |
| 6060860 | Control apparatus for variably controlling speed induction motor | Junichi Itoh, Hiroyuki Yonezawa | 2000-05-09 |
| 5959429 | Variable speed controlling device for induction motor | Hirokazu Tajima, Takashi Aihara | 1999-09-28 |
| 5880572 | Variable-speed control method and apparatus for AC motor | Hirokazu Tajima, Hiroshi Tetsutani | 1999-03-09 |
| 5859521 | Variable speed controller for an AC motor | Hirokazu Tajima, Hiroshi Tetsutani | 1999-01-12 |
| 5828199 | Variable speed controller for an induction motor | Hirokazu Tajima, Hiroshi Tetsutani | 1998-10-27 |
| 5734251 | Control apparatus for AC motor | Hirokazu Tajima, Hiroshi Tetsutani | 1998-03-31 |
| 5623190 | Method and apparatus for controlling an AC motor and detecting malfunctions | Hirokazu Tajima | 1997-04-22 |
| 5608302 | Apparatus for driving an AC motor at variable speeds | — | 1997-03-04 |
| 5532570 | Variable speed control apparatus for induction motor | Hirokazu Tajima | 1996-07-02 |
| 5525877 | Motor vibration control device and method for matching a motor speed detected value with a motor speed reference value | — | 1996-06-11 |
| 5506930 | Control apparatus for a variable speed motor | — | 1996-04-09 |
| 5489829 | Parameter identifier | — | 1996-02-06 |