Control unit for electric power steering apparatus
US6381528B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2001 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Aug 14, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/0493
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
There is provided a control unit for an electric power steering apparatus that controls a motor for giving steering assist force to a steering mechanism, based on a current control value calculated from a steering assist command value calculated based on the steering torque generated in the steering shaft, and a current value of the motor. The control unit has a first controller and a second controller for controlling the motor. Based on a current command value calculated by the second controller, the second controller monitors the first controller that controls the driving of the motor based on the steering assist command value calculated by the first controller. When the first controller is in a status not controlling the steering assist command value, the function of the second controller for monitoring the first controller is limited.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.