Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12294232 | Portable power supply | Omid Shirazi, Matthew R. Polakowski, Nathan J. Gustafson, Paul C.-P. Chao, Samantha L. Billetdeaux +8 more | 2025-05-06 |
| 11404991 | Variable frequency drive DC bus capacitor configuration to limit DC bus short circuit current | Nathan T. Seipel | 2022-08-02 |
| 10088517 | Voltage source inverter filter with resistor failure detection circuit | Mark Baumgardner, Steven Hartig, Daniel Nitzsche | 2018-10-02 |
| 10063179 | Energy saving method for use with active PWM rectifiers in regenerative drives | — | 2018-08-28 |
| 9853587 | System for operating a three-phase variable frequency drive from an unbalanced three-phase or single-phase AC source | Anupama Balakrishnan, Joshua Collins | 2017-12-26 |
| 9318992 | Drive circuit for a pre-phase AC motor | — | 2016-04-19 |
| 9154048 | Balanced flux isolation transformer based eighteen pulse rectification scheme for use with variable frequency drives | — | 2015-10-06 |
| 9099935 | Single-phase active front end rectifier system for use with three-phase variable frequency drives | — | 2015-08-04 |
| 9099934 | Three phase active rectifier system | — | 2015-08-04 |
| 8737097 | Electronically isolated method for an auto transformer 12-pulse rectification scheme suitable for use with variable frequency drives | — | 2014-05-27 |
| 8605469 | AC side soft charge circuit for variable frequency drives | — | 2013-12-10 |
| 8547143 | Resonant gate drive circuit for a power switching device in a high frequency power converter | Tsuneo Kume | 2013-10-01 |
| 8488354 | Eighteen pulse rectification scheme for use with variable frequency drives | — | 2013-07-16 |
| 8274803 | Low stress soft charge circuit for diode front end variable frequency drive | Tsuneo Kume | 2012-09-25 |
| 8179701 | Variable frequency drive soft charge circuit | Tsuneo Kume | 2012-05-15 |
| 7227330 | Overvoltage suppression technique for variable frequency drives operating reciprocating loads | Brian Geoffrey, Yoshiaki Yukihira, Mike Rucinski | 2007-06-05 |
| 6429612 | Fast stopping method for induction motors operating from variable frequency drives | Tsuneo Kume | 2002-08-06 |
| 6208098 | Variable frequency drive noise attenuation circuit | Tsuneo Kume | 2001-03-27 |
| 6028405 | Variable frequency drive noise attenuation circuit | Tsuneo Kume | 2000-02-22 |
| 6009004 | Single-phase harmonic filter system | — | 1999-12-28 |
| 5844791 | Single-phase harmonic filter system | — | 1998-12-01 |
| 5444609 | Passive harmonic filter system for variable frequency drives | Gerald R. Bisel, Steven L. Rossiter | 1995-08-22 |