FIELD: mechanical engineering, construction, erection and mounting jobs, farms. SUBSTANCE: supply source has transistor inverter, secondary rectifier, smoothing reactor, all stage connected, and also current sensor, adder, functional generator whose output is connected with first input of adder, and control unit with reference voltage input and control signal output connected with corresponding input of transistor inverter, clock frequency output connected with synchronization input of functional generator connected to outputs of current sensor and adder, respectively. Device has also setting voltage shaper whose reference input is connected with control unit reference voltage output, switch with first and second inputs connected respectively, to outputs of preset and higher setting voltage shaper, comparator connected through output with control input of switch and integrator whose input is connected with switch output, and output, with second input of adder. EFFECT: enlarged operating capabilities. 3 dwg
