Research on ultrasonic cleaning power frequency tracking technology based on fuzzy adaptive PID

Abstract

Ultrasonic cleaning technology has been used to a certain extent in home, but the resonant frequency of the ultrasonic transducer shift with the change of temperature and external environment, eventually leading to ultrasonic transducer work in a non-resonant state, resulting in lower power output. The amplitude of the transducer decreases, which affects the cleaning effect. In view of the above problems, a frequency tracking design scheme based on the fuzzy adaptive PID is proposed, which aims automatically track the ultrasonic cleaning power supply. In this scheme, the current - phase difference composite tracking method is selected, which improves the tracking speed and accuracy under the condition of ensuring that the optimal resonance point can be tracked. The static model and dynamic characteristics of the transducer are also analyzed to derive the design of matching circuit, which enables the transducer to get the maximum power input. The feasibility and high efficiency of the design scheme are demonstrated by LT-spice and MATLAB simulation experiments, which provide a reference for the practical application of ultrasonic cleaning devices.