Piezoelectric stick-slip-motor and method of controlling same
US11888415B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2020 |
| Grant date | Jan 30, 2024 |
| Priority date | — |
| Expiry date | Jan 28, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present disclosure relates to a piezoelectric stick-slip-motor and control method. An exemplary method to enable speed variation of the piezoelectric stick-slip-motor with a reduced noise generation, includes: applying a cyclic sawtooth-waveform drive voltage signal with a constant frequency in which the drive voltage (V) increases to and decreases from a peak voltage (Vp) for operating the motor with a constant speed; and changing the motor speed by gradually increasing or decreasing the gradient (dV/dt) of increasing the drive voltage (V) to the peak voltage (Vp) with each subsequent sawtooth-waveform drive voltage signal cycle (C) while keeping the frequency of the drive voltage signal constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.