SYNCHRONOUS MOTOR EXITATION CONTROLLER Russian patent published in 1997 - IPC

FIELD: electrical engineering. SUBSTANCE: for synchronous motor 1 exiting winding 5 is shunting by resistor 12 connecting to terminals 7 and 8 of this winding and output voltage of one phase semicontrolled rectifier 6 is putting on same terminals. Rectifier 6 is connected with stator winding of motor connected to feeding network 4. Thyristor commutator 9 is connected in parallel with rectifier 6 terminals 15 and 26 and commutator control system 10 has variable resistors 11 and 43, additional thyristor 44 and diodes 39 and 40. Controller has time relay 13 of motor stator 2 winding net feeder circuit. Relay normally open contacts 27 and 28 are connected to thyristors 16 and 18 circuit of rectifier 6 and normally closed contact 42 is connected with commutator 9 control system 10. Controller arrangement permits synchronous motor exitation forcing in transient regime. EFFECT: better static and dynamic stability of synchronous motor operating. 4 dwg