Motor drive apparatus and electric power steering system using the same
US8436568B2 · kind B2 · utility
11Cited by
14References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 2011 |
| Grant date | May 7, 2013 |
| Priority date | — |
| Expiry date | Dec 26, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A motor drive apparatus includes a control circuit, which determines that a wire connecting a battery to a first power supply relay and a second power supply relay is broken, and not failure of the power supply relays, if power is not supplied to a motor from the power supply relays when the power supply relays are controlled to turn on. The location of failure can thus be specified accurately. It is only necessary in this case to replace the wire. The motor drive apparatus need not be disassembled or investigated in detail. Man-power for specifying the failure location can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.