Electric motor control apparatus
US8232752B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2007 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | Oct 30, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/325
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electric motor control apparatus that can quickly and accurately locate a short-circuit fault point. The electric motor control apparatus includes: a current controller determining respective phase voltage commands according to currents flowing in respective phases of an electric motor and a torque current command; a switching element drive circuit instructing, based on the respective phase voltage commands, an inverter to perform a switching operation; the inverter receiving a switching operation signal to drive the electric motor; current detectors disposed in series with the switching elements in the respective phases of the inverter; and a short-circuit point locating mechanism storing a test pattern indicative of a predetermined combination for turning on the switching elements of the inverter, and locating a short-circuit fault point based on the test pattern and current detection values in the respective phases detected by the current detectors in response to the test pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.