FIELD: physics.
SUBSTANCE: one-phase-three-phase reversing switchboard semi-conductor keys form antiparallel pairs with one outputs connected to the AC one-phase mains phase, the said keys being built around turn-off thyristors. The other outputs of the keys are connected to the outputs of the second and third windings of three-phase induction motor. The inputs of the aforesaid windings are connected to the AC one-phase mains zero, while the three-phase induction motor first winding input is connected to the phase while its output is connected to the one-phase AC mains zero. The switchboard carries out vector control over three-phase induction motor by creating a rotating field of the stator.
EFFECT: feeding three-phase induction motor from single-phase mains with rotor rpm adjustment.
8 dwg
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