The research on phase lock method of ultrasonic power supply with variable step length control

Author

Jie Luo ; Guiping Du ; Junxiang Fang

Author_Institution

Sch. of Electr. Power, South China Univ. of Technol., Guangzhou, China

fYear

2014

fDate

5-8 Nov. 2014

Firstpage

400

Lastpage

405

Abstract

The resonance characteristics of ultrasonic transducer are analyzed based on the equivalent circuit of transducer and the quantitative calculation of admittance circle, and a control method of frequency tracking based on variable step length is proposed, and the limits of step switching are deduced, and the control parameters of the control method based on variable step length is designed in this paper. The results of simulation and experiment show that the system based on the control method can control output frequency in high precision. And while ultrasonic power supply ensure steady-state error minimum, holding a good dynamic performance, which meets the requirements of the technology of ultrasonic power supply.

Keywords

frequency control; power supplies to apparatus; ultrasonic applications; admittance circle; control parameters; frequency tracking control method; output frequency control; phase lock method; resonance characteristics; steady-state error; step switching; transducer equivalent circuit; ultrasonic power supply; ultrasonic transducer; variable step length control; Acoustics; Frequency control; Power supplies; Resonant frequency; Steady-state; Transducers; Ultrasonic transducers; frequency tracking; ultrasonic power supply; variable step length;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics and Application Conference and Exposition (PEAC), 2014 International

Conference_Location

Shanghai

Type

conf

DOI

10.1109/PEAC.2014.7037889

Filename

7037889