System and method for confirming a detection of low voltage and shorted SCRs
US7378816B2 · kind B2 · utility
2Cited by
2References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 19, 2005 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | Aug 1, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/0833
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor controller system includes solid state switches for connection between an AC line and motor terminals for controlling application of AC power to a motor. Voltage sensors sense voltage across each of the solid state switches and AC line voltage. A control circuit controls operation of the solid state switches. The control circuit compares the sensed voltages across each of the solid state switches with the AC line voltage in a non-run mode to determine if there is a shorted solid state switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.