Method and apparatus to monitor an electric motor control circuit
US8334670B2 · kind B2 · utility
4Cited by
14References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 25, 2010 |
| Grant date | Dec 18, 2012 |
| Priority date | — |
| Expiry date | Mar 8, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/42
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric motor control circuit includes an electric energy storage device electrically connected via DC power buses to an inverter circuit that connects via an alternating current circuit to an electric machine. A capacitive shunt circuit connects between the power buses. Current flow through the capacitive shunt circuit to the chassis ground is monitored. A fault is identified when the current flow through the capacitive shunt circuit to the chassis ground exceeds a threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.