Ultrasonic power supply is usually called ultrasonic source, ultrasonic generator. Its function is to convert electrical energy into high-frequency AC signal that matches the ultrasonic transducer. From the perspective of the amplifier circuit, linear amplifier circuit and switching power supply circuit can be used. High-power ultrasonic power supply generally adopts the circuit form of switching power supply from the perspective of conversion efficiency. Linear power supply also has its own unique application range. Its advantage is that it does not strictly require circuit matching and allows the working frequency to change continuously and rapidly. From the situation in the ultrasonic industry, ultrasonic power supply is mainly divided into self-excited and self-excited power supply.

The principle of ultrasonic power supply is that the signal generator first generates a signal of a specific frequency. This signal can be a sine signal or a pulse signal. This specific frequency is the frequency of the transducer. The ultrasonic frequencies generally used in ultrasonic equipment are 20KHz, 25KHz, 28KHz, 33KHz, 40KHz, and 60KHz; 100KHz or above have not been used in large quantities. But with the continuous development of precision cleaning in the future. I believe that the application area will gradually expand.