Title :
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
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;
Conference_Titel :
Electronics and Application Conference and Exposition (PEAC), 2014 International
Conference_Location :
Shanghai
DOI :
10.1109/PEAC.2014.7037889
