FIELD: electrical engineering, systems controlling power supply sources with quasi- sinusoidal output voltage. SUBSTANCE: technical objective of proposal lies in expansion of functional capabilities of device with raised quality of output voltage, in enhanced precision of reproduction of controlling action by way of periodic correction of coefficient of modulation depth and in increased reliability of device. Device to control inverter includes inverter, unit for isolation of pulsation, modulator, transmitter of amplitude value of input voltage, transmitter of amplitude value of output voltage of inverter and overload detector. Modulator has master unit, analog-to-digital converter, microprocessor and former of control signals. Inputs of unit for isolation of pulsation and transmitter of amplitude value of input voltage are connected to power input of inverter, output of unit for isolation of pulsation is linked to first information input of analog-to-digital converter, output of transmitter of amplitude value of input voltage is connected to second information input of analog-to-digital converter, third information input of analog-to-digital converter is connected to output of transmitter of amplitude value of output voltage of inverter whose input is connected to output of inverter. Fourth information input of analog-to-digital converter is linked to output of master unit, fifth input " data reading " of analog-to-digital converter is connected to output " data reading " of microprocessor, sixth address input of analog-to-digital converter is connected to address output of microprocessor. First output " data readiness " of analog-to-digital converter is linked to input " data readiness " of microprocessor, second output " data output " of analog-to-digital converter is connected to data input of microprocessor, information output of microprocessor is connected to information input of former of control signals whose multichannel output is connected to controlling inputs of inverter. Output of overload detector is linked to interruption input of microprocessor and input of overload detector is connected to output of inverter. EFFECT: expanded functional capabilities of device. 2 dwg
