Electric power steering device, and control method thereof
US7663330B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 2007 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Aug 9, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/0469
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An actual detected current value and a target voltage value of an electric motor are subjected to a low-pass filter process, and amounts of change per time in the filtered actual current value and the filtered target voltage value are calculated. If the amount of change in the actual current value on the increase side is greater than a criterion value and the amount of change in the target voltage value on the decrease side is greater than a criterion value, it is judged that the stroke end has been reached. Then, the upper limit value of the target current value is set at the actual current value obtained in the immediately previous cycle of the feedback control, so as to prevent generation of unnecessary torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.