Drive circuits and methods for ultrasonic piezoelectric actuators
US7538473B2 · kind B2 · utility
37Cited by
60References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2006 |
| Grant date | May 26, 2009 |
| Priority date | — |
| Expiry date | Apr 25, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B17/0607
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A drive circuit for and method of driving a piezoelectric actuator utilizes an impedance coupled to the piezoelectric actuator, wherein the impedance and the piezoelectric actuator together form a tank circuit that has a resonant frequency. A first circuit is provided that drives the actuator at the resonant frequency and a second circuit is further provided that selectively operates the first circuit in one of at least two modes of operation including a first mode that causes the actuator to be energized at a first duty cycle and a second mode that causes the actuator to be energized at a second duty cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.