FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering and can be used for power supply of excitation windings of electric machines. Reversible magnetic amplifier comprises two three-phase amplifiers with self-magnetization, in each phase of which two power windings with their leads are connected in series to electrodes of diodes, the second electrodes of triads of which with their leads are combined and form poles connected to diagonals of a bridge, two opposite arms of which are formed by resistors, and the other two – by half-windings of the electric machine, and the other leads of the power windings are combined and are intended for connection to an AC network. Amplifier has control windings. Herewith, parallel to the poles of each amplifier with self-magnetization there is a diode connected.
EFFECT: higher reliability and efficiency.
1 cl, 1 dwg
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