Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Parallel connected motors
Patent
1980-03-24
1981-11-03
Scott, James R.
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Parallel connected motors
318 34, 318729, 318808, 318805, H02P 154, H02P 546, H02P 124, H02P 528
Patent
active
042988314
ABSTRACT:
A plurality of arbitrarily loaded induction machines are operated from a single, controlled current inverter by regulating the amplitude of inverter output current in response to the average of the individual induction machine phase angles, the machine phase angle being the phase relationship magnitude between machine air gap flux and current, and by regulating the frequency of inverter output current in response to the average of the individual induction machine phase angle and the slip frequency of the most heavily loaded induction machine. The most heavily loaded induction machine is thus assured of having sufficient flux, thereby greatly reducing the possibility of machine pull-out and resultant inverter instability.
REFERENCES:
patent: 3911340 (1975-10-01), Plunkett
patent: 3916275 (1975-10-01), Plunkett
patent: 4088934 (1978-05-01), D'Atre et al.
patent: 4135118 (1979-01-01), Seeger et al.
Article entitled "A Current Source Converter for Multi-Motor Applications", by Stanley Mann, 1975, IEEE-IAS Annual Proceedings, pp. 980-983.
D'Atre John D.
Espelage Paul M.
Conklin John B.
Davis Jr. James C.
General Electric Company
Scott James R.
Steinberg William H.
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