120W 28KHZ เครื่องกําเนิดการสั่นสะเทือนอัลตราโซนิก Pcb Circuit Board สําหรับถังทําความสะอาดอัลตราโซนิก

The purpose of frequency tracking of low-power ultrasonic PCB driving circuit board is to use feedback technology to adjust the output frequency of ultrasonic generator to match the resonance frequency of transducer, so as to make the transducer always work in the best state. There are two methods for frequency tracking of traditional ultrasonic power supply, acoustic tracking and electrical tracking. At present, most tracking methods use electrical tracking. This method is divided into current feedback method, impedance bridge method and phase locked loop method.