Method and apparatus to monitor loss of ground isolation of an electric motor drive circuit
US8635033B2 · kind B2 · utility
4Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2010 |
| Grant date | Jan 21, 2014 |
| Priority date | — |
| Expiry date | Nov 21, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG16Z99/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for monitoring electric isolation of a high voltage DC bus to detect ground isolation faults includes monitoring voltage differentials between a positive DC electric power bus and a negative DC electric power bus and a chassis ground. Electrical isolation between each of the positive and negative DC electric power buses and the chassis ground is monitored using a ratio of the voltage differentials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.