Current sensor fault mitigation for steering systems with permanent magnet DC drives
US10822024B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2017 |
| Grant date | Nov 3, 2020 |
| Priority date | — |
| Expiry date | Sep 22, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2205/01
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Technical solutions are described for current sensor fault mitigation for systems with permanent magnet DC drives. An example power steering system includes a brush motor, and a motor control system that generates an amount of torque using the brush motor, the amount of torque corresponding to a torque command. The motor control system includes a current sensor fault detector that detects a current sensor fault associated with a current sensor used to measure a current across the brush motor. The motor control system further includes a velocity observer that computes an estimated motor velocity in response to the current sensor fault. The motor control system further includes a feedforward controller that generates a current command for generating the amount of torque using the brush motor, the current command generated using the estimated motor velocity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.