Abnormality detecting method and device for position detecting device, and electric power steering device
US6615152B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2001 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Oct 4, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/049
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In an abnormality detecting device for a position detecting device which generates an amplitude-modulated or phase-modulated signal from a position sensor according to the rotational position of the rotor of a motor when a reference signal having a predetermined periodic waveform is supplied, there are provided a bias current applying unit made of a passage including a resistance of applying DC bias current to an output winding of the position sensor, positional abnormality detecting units for detecting a biased DC signal of an amplitude-modulated or phase-modulated signal applied to the output winding apart from a position detector circuit for detecting the rotational position of the rotor, and an abnormality detection judgment processing part for judging abnormality of the position detecting device from a DC signal detected by the positional abnormality detecting units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.