Estimating torque/force exerted by a load against a motor-driven actuator
US7424937B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2006 |
| Grant date | Sep 16, 2008 |
| Priority date | — |
| Expiry date | Jul 20, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2066/006
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A first method for estimating a torque/force exerted by a load against an actuator driven by an electric motor against the load includes measuring motor current of the electric motor and measuring a position/angle or speed/angular speed of the actuator and includes calculating the torque/force exerted by the load against the actuator using at least a difference between a calculated motor torque/force and a calculated actuator-experienced torque/force. A second method includes measuring input voltage of the electric motor instead of measuring motor current. A third method includes measuring both motor current and input voltage. In one example, without limitation, the actuator is an automotive electromechanical brake caliper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.