Electricity: motive power systems – Synchronous motor systems – Armature winding circuits
Patent
1980-03-31
1981-06-30
Truhe, J. V.
Electricity: motive power systems
Synchronous motor systems
Armature winding circuits
318717, 318802, 318809, H02P 528, H02P 534, H02P 736
Patent
active
042765056
ABSTRACT:
A load-commutated inverter synchronous machine drive system control apparatus comprises at least one microcomputer for determining optimum or desired values for inverter turn-off time, inverter link current and machine air gap flux from machine drive system voltage and currents. Inverter frequency is regulated in accordance with the difference in magnitude between optimum and actual inverter turn-off time to minimize the inverter turn-off angle irrespective of machine frequency, thereby reducing synchronous machine reactive power. Inverter link current and synchronous machine field current are regulated responsive to the difference in magnitude between optimum and actual inverter link current and the difference in magnitude between optimum and actual machine air gap flux, respectively, thereby assuring machine operation at maximum efficiency.
REFERENCES:
patent: 3775649 (1973-11-01), Bayer et al.
patent: 4088935 (1978-05-01), D'Atre et al.
patent: 4099107 (1978-07-01), Eder
patent: 4207510 (1980-06-01), Woodbury
patent: 4215305 (1980-07-01), D'Atre et al.
Davis Jr. James C.
General Electric Company
Moose Richard M.
Steinberg William H.
Truhe J. V.
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