Method and circuit for processing a resolver fault
US8198841B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2009 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Aug 27, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D3/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of processing a resolver fault in a motor generator unit (MGU) includes receiving a position signal from a resolver describing a measured angular position of a rotor of the MGU, determining the presence of the resolver fault using the position signal, and calculating or extrapolating an estimated rotor position when the resolver fault is determined. A predetermined resolver fault state may be determined using a measured duration of the resolver fault, and the MGU may be controlled using the estimated rotor position for at least a portion of the duration of the resolver fault. A motor control circuit is operable for processing the resolver fault using the above method, and may automatically vary a torque output or a pulse-width modulation (PWM) of the MGU depending on the duration of the resolver fault.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.