40khz Low Power Ultrasonic Generator Circuit PCB For Driving Cleaner/Dishwasher

The 40khz ultrasonic circuit board uses the frequency automatic tracking method to drive the ultrasonic cleaning generator and ultrasonic cleaning transducer to work in the best state, so that the whole machine of the ultrasonic cleaning machine can achieve the best working efficiency, calculate the power value and change the output power of the ultrasonic generator through the pulse width modulation circuit.

 

 

 

Due to the characteristics of ultrasonic transducer, the matching circuit in the ultrasonic cleaning machine includes two parts: one is power matching and the other is tuning matching. The former is to make the output internal resistance of the ultrasonic power supply consistent with the load impedance, using the transformer matching method. The latter is to make the transducer present pure resistance and adopt the method of series inductance.

 

 

 

The 40khz ultrasonic circuit board PWM pulse width duty cycle controls the energy conversion driving voltage of the link; The commutation drive voltage generates the commutation drive current through the matching and resonance of the commutation execution link; After the calculation and processing of the frequency conversion feedback link, the transducer drive voltage and transducer drive current are converted into the ultrasonic processing feedback frequency and introduced into the comparison link.