Electricity: motive power systems – Synchronous motor systems – Armature winding circuits
Patent
1984-06-21
1985-08-20
Smith, Jr., David
Electricity: motive power systems
Synchronous motor systems
Armature winding circuits
318803, H02P 540
Patent
active
045366926
ABSTRACT:
A circuit for energizing and controlling a synchronous rotary machine which operates at variable speed and is fed by controlled static switches, wherein the stator of the rotating machine has a plurality n of polyphase windings where n is at least equal to two, each polyphase winding being fed by a static AC-AC converter (A, B) which constitutes an autosychronous inverter having a mains bridge (PRA, PRB) and a machine bridge (PMA, PMB) connected to each other by first and second DC conductors, and wherein the circuit has means for controlling the mains bridge of each converter in such a way that the sum of the DC currents (IA+IB) in said conductors of all the converters is proportional to a reference average current value.
REFERENCES:
patent: 3970914 (1976-07-01), Salzmann et al.
patent: 4008428 (1977-02-01), Waldmand et al.
patent: 4172991 (1979-10-01), Akamatsu et al.
patent: 4349772 (1982-09-01), Weiss
patent: 4392099 (1983-07-01), Kuniyoshi
patent: 4424475 (1984-01-01), Godfroid
Murphy, J. M. D. Thyristor Control of A.C. Motors, Pergamon Press, 1973, pp. 82-83.
CGEE Alsthom
Smith Jr. David
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