Electric power system for starting a large rotatable...

Details Electric power system for starting a large rotatable... Electric power system for starting a large rotatable...

H - Electricity

02

P

318/80, 342/34.1

H02P 8/00 (2006.01)

Patent

CA 1283443

ELECTRIC POWER SYSTEM FOR STARTING A LARGE ROTATABLE SYNCHRONOUS MACHINE ABSTRACT OF THE DISCLOSURE For starting a rotatable 3-phase a-c electrical machine of the synchronous type, the stator windings of the machine are connected to an electric storage battery via a controllable electric power converter, and the d-c field winding is connected in series with the stator windings by inserting it in the load current path between the converter and battery. Field weakening resistance is connected in parallel with the field winding. The converter includes a plurality of electric valves (thyristors) that are cyclically turned on in a predetermined sequence in synchronism with alternating voltages developed at the line terminals of the stator windings.

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