Excitation system for a synchronous machine

Details Excitation system for a synchronous machine Excitation system for a synchronous machine

1980-03-28

1982-01-19

Truhe, J. V.

Electricity: motive power systems

Synchronous motor systems

Field winding circuits

318716, H02P 146, H02P 528

Patent

active

043119506

ABSTRACT:
An excitation system for a synchronous machine comprising an exciter having its output connected through a current relay in parallel with a starting-protecting unit. The starting-protecting unit includes parallel branches, each comprising a series-connected resistor and thyristor switch having a voltage-sensitive threshold element connected between its anode and gate. A turn-on unit for the parallel branches of the starting-protecting unit includes a voltage-sensitive overvoltage detector connected in parallel with the exciter output, in which the voltage setting is lower than that of the threshold element of the parallel branches of the starting-protecting unit. A memory unit; and a pulse-forming unit. The output of the overvoltage detector is connected through the memory unit to the input of the pulse-forming unit. The output of the pulse-forming unit is connected via the contacts of the current relay to the gates of the thyristor switches in the parallel branches of the starting-protecting unit.

REFERENCES:
patent: 3449652 (1969-06-01), Ishizaki
patent: 3539890 (1970-11-01), Zechlin
patent: 4106069 (1978-08-01), Trautner et al.
Vershinin, P. P., Hashper, L. Ya. "Synchronous Machines in Metal-Making", Moscow, 1974.
"Catalogue of Series KTU Complete Thyristor Devices", OKP. 341.631, Tallin, 1978.

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