FIELD: electricity.
SUBSTANCE: power supply circuit coupled to the network line with positive potential and GND-potential of the supply unit comprises a coil connected by its first output to positive potential and by its second output to GND-potential, a semiconductor switch switched on between the coil and GND-potential, a semiconductor switch switched on between positive potential and coil, a diode connected between the second output of the coil and positive potential if straight direction and a diode switched on between GND-potential and the first output of the coil in straight direction. An accumulator battery charged from the network supply unit in the process phase may be charged by energy accumulated in the coil from one of process phases with further supply by recuperated energy of the coil. The microcontroller activates semiconductor switches depending on parameters of a signal tracked by the detection circuit; when current reaches threshold value at the coil the microcontroller switches the semiconductor switches off so that current starts passing through the recuperating circuit and when current decreases up to minimum value the microcontroller switches the semiconductor switches on so that the coil starts using the recuperated energy.
EFFECT: reducing power consumption.
3 cl, 3 dwg
