Frequency adjustable ultrasonic generator principle
The input of the ultrasonic generator is a fixed frequency signal, the waveform of the signal can be sinusoidal, pulse, but its frequency is fixed to the frequency of the transducer, generally 20,25,28,33,40,60 khz, etc. . Through the internal conversion of the ultrasonic generator, its output is power signal, frequency tracking signal and so on.
Because the output signal is unstable with the change of the input signal, there is a feedback part in part of the ultrasonic generator. On the one hand, the change of the input signal leads to the instability of the output power, which makes the mechanical vibration of the transducer irregular and results in the bad cleaning effect, the output power is regulated by the power feedback signal so that it does not change with the input signal and presents a stable state. The regular mechanical vibration of the transducer makes the cleaning effect better. On the other hand, the efficiency of the transducer when the frequency is at the resonant frequency point * , but in practice, the feedback part plays its role because various reasons can not make it work in the * State all the time, to provide frequency tracking signal, the control signal generator sends out the signal always at the resonant point of the transducer, so that it always works in a * state.
Frequency variable ultrasonic generator principle-characteristics
In addition to adjusting the output power to make it stable and adjusting the frequency to make the transducer work in a constant state, the ultrasonic generator can also monitor the power and operating frequency of the high-power ultrasonic system, you can set parameters to achieve automatic frequency tracking, can control the amplitude of the load changes can also be in a stable state, can be a bad situation when the alarm to protect the system equipment, and so on. It is believed that with the development of science and technology, the ultrasonic generator will be more and more powerful, and gradually improve out of more functions.