A power supply for a technological installation

A voltage changer for the pou er supply of an ultrasonic piezoelectric tran sduces is designed on the basis of a resonance inverter. The output filter designed on the basis of a series-resonant circuit with parallel and series compensation ensures matching of the changer to the load. The changer ensu res a load current of 0.5 A +/- 10% within a wide range of the load resista nce (from 50 to 400 Omega) at an input voltage of 220 V +/- 15% with automa tic tuning to the frequency of the load mechanical resonance. The changer o utput power is 100 W, and the output current is a sinusoid with a frequency of 22 +/- 2 kHz.