Ultrasonic motor control system and method
US9513620B2 · kind B2 · utility
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10References
20Claims
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Key dates
| Filing date | Mar 25, 2014 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Feb 20, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/142
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of controlling an ultrasonic motor coupled to a motor driver circuit, comprises receiving a temperature signal representing the temperature of the ultrasonic motor, receiving a position signal output by a first encoder representing the position of the ultrasonic motor, calculating an error between the position of the ultrasonic motor represented by the position signal and a target position, calculating a control signal based on the temperature of the ultrasonic motor represented by the temperature signal and the calculated error, and sending the control signal to the motor driver circuit to control the ultrasonic motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.