Electric power steering apparatus
US9278708B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2012 |
| Grant date | Mar 8, 2016 |
| Priority date | — |
| Expiry date | Oct 29, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/032
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An electric power steering apparatus for generating a PWM signal based on a calculated steering assist command value, PWM-controlling a motor via a motor drive circuit including switching elements, and assist-controlling a steering system that a motor relay is inserted between the motor drive circuit and the motor, includes a steering status detecting section that detects a steering status of a steering wheel, outputs a longtime steering holding signal when detecting that the steering status is a longtime steering holding status, and outputs a normal steering signal when detecting that the steering status is a normal steering status, and a motor current control section that determines a motor current control value for controlling a motor current flowing in the motor relay in accordance with the longtime steering holding signal or the normal steering signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.