FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering and can be used to control synchronous AC motors. Phase winding circuit for the motor includes at least two phase windings forming one half of phase windings of the circuit motor, and at least two other phase windings which form the other half of the phase windings of the circuit motor. DC power supply unit is located at least approximately at the midpoint of the motor phase windings for receiving AC power transferred from one or more phase windings and converting AC energy to DC energy. Power switch circuit of the first cascade comprises at least one power switch outside the DC power supply and is electrically connected at least approximately at mid point between phase windings on each half of the circuit. Power switch circuit of the second cascade comprises at least one other power switch outside the DC power supply and is electrically connected at least approximately at the midpoint of the separated phase windings for receiving AC power from the separated phase windings of the motor. Non-collapsing component of the DC power supply unit prevents the DC supply unit from collapsing when at least one power switch or at least one other power switch is switched on and conducts electric current.
EFFECT: technical result is higher efficiency.
45 cl, 36 dwg
