Method and apparatus for monitoring an electric power circuit
US9274159B2 · kind B2 · utility
5Cited by
1References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 16, 2013 |
| Grant date | Mar 1, 2016 |
| Priority date | — |
| Expiry date | Apr 23, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for monitoring an electric power circuit configured to transfer a power signal to a torque module that is electrically isolated from a chassis ground includes injecting a common voltage component into a common mode voltage of electrical phases during operation and monitoring a negative-ground voltage and a positive-negative voltage of the electric power circuit. An AC line resistance is determined based upon the negative-ground voltage and the positive-negative voltage. Faults in electrical isolation between the electric power circuit and a chassis ground are detected based upon the AC line resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.