Pulse-controlled electric power-assisted steering system
US6686713B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2002 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Sep 26, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D15/0235
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to an electric power-assisted steering system making it possible to apply an assist torque for the angular displacement of the wheels of a vehicle, said torque being applied by an electronically commutated motor (2) comprising P phases and N pairs of poles, said system also comprising a device for controlling the motor (2) comprising a circular multipole encoder (17) comprising a main multipole track (17a) and a multipole commutation track (17b) comprising magnetic singularities (17b1-17b6) equidistributed angularly, a fixed sensor (19) capable of delivering square digital signals A, B in quadrature, and a signal C in the form of 2*P*N pulses per revolution of the rotor (3), a circuit for commutating (20) the currents in the phase windings of the motor (2) and a control circuit (21) for the commutation circuit (20).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.