Electricity: motive power systems – Synchronous motor systems
Patent
1993-02-01
1995-05-16
Ro, Bentsu
Electricity: motive power systems
Synchronous motor systems
318722, H02H 708
Patent
active
054163986
ABSTRACT:
A synchronous machine (22) can be run up with increasing frequency by a controllable frequency converter (21) with an opened switch (S1) and a closed switch (S2), the exciter direct current for its exciter winding (22E) being supplied by a starting converter (23). When the synchronous machine (22) is operated from the power system, it is excited by the direct-current link of this frequency converter (21). In order to increase the availability of the synchronous machine (22), the two static converters (18, 19) of the frequency converter (21) can be selected in two channels so that when one static converter fails due to a fault, the other one generates the link direct voltage (Uzk) required for the direct-current excitation. The rotor of the synchronous machine (22) can be coupled to a gas turbine (28) via a transmission (27).
REFERENCES:
patent: 4012679 (1979-03-01), Matsuda et al.
patent: 4931715 (1990-06-01), Lee et al.
patent: 5272424 (1993-12-01), Lee
"Frequenzumrichter zum Anlassen der Synchronmaschinen in einem Pumpspeicherwerk", Hogberg, ASEA ZEITSCHRIFT 1976, Jahrgang 21, Heft 4, pp. 75-80.
"Standardized Starting Equipment", Peneder, et al., BBC Brown Boveri Publication No. CH-E 2.0340.0E, pp. 1-8.
Asea Brown Boveri Ltd.
Ro Bentsu
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