Motor drive apparatus and method for electric power steering system
US8134326B2 · kind B2 · utility
3Cited by
9References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 16, 2008 |
| Grant date | Mar 13, 2012 |
| Priority date | — |
| Expiry date | Jul 2, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2209/07
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In a motor drive apparatus for an EPS motor, which provides steering assist torque in an electric power steering system, a three-phase inverter applies three phase-voltages to the EPS motor, and a controller controls the three-phase inverter. The controller drives the EPS motor by implementing a two-phase modulation method and a three-phase modulation method, when at least one of the assist torque, a steering angle acceleration and a function value of a predetermined function is greater and less than a predetermined threshold value indicative of a rapid steering operation, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.