Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7746020 | Common mode & differential mode filter for variable speed drive | Harold Robert Schnetzka, Shreesha Adiga Manoor | 2010-06-29 |
| 7555912 | System for precharging a DC link in a variable speed drive | Harold Robert Schnetzka | 2009-07-07 |
| 7439702 | Application of a switched reluctance motion control system in a chiller system | Stephen H. Smith, Harold Robert Schnetzka | 2008-10-21 |
| 7425806 | System and method for controlling a variable speed drive | Harold Robert Schnetzka, Scott Victor Slothower | 2008-09-16 |
| 7332885 | Ride-through method and system for HVAC&R chillers | Harold Robert Schnetzka | 2008-02-19 |
| 7208891 | Variable speed drive for a chiller system | Harold Robert Schnetzka | 2007-04-24 |
| 7202626 | Variable speed drive for a chiller system with a switched reluctance motor | Harold Robert Schnetzka, Stephen H. Smith | 2007-04-10 |
| 7081734 | Ride-through method and system for HVACandR chillers | Harold Robert Schnetzka | 2006-07-25 |
| 6686718 | Control loop and method for variable speed drive ride-through capability improvement | Harold Robert Schnetzka | 2004-02-03 |
| 6211792 | Method and apparatus detecting a failed thyristor | Harold Robert Schnetzka, Gregory K. Beaverson | 2001-04-03 |