Acoustic transducer driver and controller
US11381922B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2020 |
| Grant date | Jul 5, 2022 |
| Priority date | — |
| Expiry date | Jul 30, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An acoustophoretic system is controlled and driven to attain a desired level of performance. An RF controller and a driver provide a frequency and power to an acoustic transducer, which can be implemented as a piezoelectric element, which presents a reactive load or a complex load. A controller implements a control technique for efficient transducer operation. The control technique can locate a frequency for operation that is at a reactance minimum or maximum for the system to produce a modal pattern and to provide efficient operation of the transducer. A method of detecting a minimum or maximum reactance in a acoustophoretic system used to trap, separate, deflect, cluster, fractionate or otherwise process particles or secondary fluids or tertiary fluids in a primary fluid and utilizing the frequency of the detected reactance to operate the acoustophoretic system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.