A modulation driver of quasi-sinusoidal asymmetric current

A modulation driver of quasi-sinusoidal asymmetric cut-rent designed to fee d an electrocoagulator is described. The device ensures specified parameter s of the output current for a wide range of load resistances and frequencie s. The rated load power is 2.5 kW, the output current has a quasi-sinusoida l asymmetric shape, the mean value of the current positive half-wave is 5-1 6 A, the degree of asymmetry of half-waves of opposite polarities is 6-11,t he range of the sliding frequency control is 20-2000 Hz, and the frequency set-on accuracy is +/-1 Hz. The device is fed from a 380 V--15(+10)% and (5 0-60)-Hz three-phase main.