Apparatus and method for controlling an oscillating device
US10637384B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 21, 2017 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Jun 1, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for stopping a linear resonant actuator is presented. A control system for use with an oscillating device has a response signal having a back electromotive force component and a driver adapted to provide a drive signal to the oscillating device. The control system has a sensor adapted to sense an electrical parameter of the response signal and a controller coupled to the sensor and to the driver. The controller has a calculator adapted to determine a sign of curvature of a portion of the response signal based on the electrical parameter, and the controller is adapted to provide a control signal to adjust the amplitude of the drive signal to slow down the oscillating device, and withdraw the drive signal upon identifying a change in the sign of curvature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.