Start-up system for a synchronous motor drive

Details Start-up system for a synchronous motor drive Start-up system for a synchronous motor drive

H - Electricity

02

P

318/120

H02P 6/18 (2006.01) H02P 1/46 (2006.01)

Patent

CA 1286714

ABSTRACT OF THE DISCLOSURE In a load commutated inverter (LCI) motor drive, the motor is started from a rotor rest position by modulat- ing the rotor winding with a field current at a constant rate to induce stator voltages which are detected in terms of signs, so as to identify the rotor rest position. The induced stator voltages are used to select an initial pair of thyristors of the inverter to be turned On in the firing sequence for the chosen direction of rotation under normal operation of the drive.

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