Motor control
US10651766B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 5, 2014 |
| Grant date | May 12, 2020 |
| Priority date | — |
| Expiry date | Mar 5, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P23/03
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A motor control circuit for an electric motor of an electric power assisted steering system of the kind in which a measurement of torque carried by a part of the steering system is used to produce a torque demand signal indicative of a torque to be applied to the steering system by the motor. The motor control circuit includes a current controller is responsive to an error signal that represents the difference between a current demand signal and an actual current signal, and a noise reduction circuit adapted to identify an operating condition of the system in which the motor is stationary or rotating at a very low speed, and in the event that the operating condition is identified the noise reduction circuit is adapted to reduce the response of the controller to variations in the error signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.