Motor-driven power steering apparatus
US7392879B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2005 |
| Grant date | Jul 1, 2008 |
| Priority date | — |
| Expiry date | Dec 26, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2207/073
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a motor-driven power steering apparatus, the main coil winding and auxiliary coil winding are wound around the same slot of a stator core in a parallel manner, a motor drive means has a main driver feeding at least to the main coil windings, and an auxiliary driver feeding only to the auxiliary coil windings, the main driver being actuated so as to be capable of assisting the steering during normal conditions of a control system of an electric motor, and the auxiliary driver is actuated so as to execute an auxiliary assist corresponding to a motor friction torque under abnormal conditions of the control system of the electric motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.