Method and apparatus for detecting a location of ground faults in a motor/motor drive combination
US8593150B2 · kind B2 · utility
5Cited by
1References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 10, 2010 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Feb 25, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A motor drive system provides for analysis of current flow in the DC bus to identify ground faults and their locations. Low-frequency positive polarity and negative polarity current differences indicate ground faults from the positive DC bus and negative DC bus respectively. High-frequency signals indicate ground faults in the motor windings and connecting leads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.