Electricity: motive power systems – Synchronous motor systems – Armature winding circuits
Patent
1983-01-21
1984-07-17
Rubinson, G. Z.
Electricity: motive power systems
Synchronous motor systems
Armature winding circuits
318803, 318717, H02P 536
Patent
active
044608616
ABSTRACT:
An adjustable speed machine-commutated inverter-synchronous motor drive includes control of the inverter at a selected rate without positioning. The line converter is controlled so as to maintain a relation I=f(T) and the relation E/l=g(T) is established by applying to the field regulator loop a reference which is a function of T, where T is the torque, I the current drawn by the motor drive and E the excitation voltage. Accordingly, the torque is not sensed. The functions are chosen so that the commutation margin angle is safe under natural commutation by the EMF of the motor and also chosen to improve drive operation.
REFERENCES:
patent: 3840799 (1974-10-01), Macko et al.
patent: 4215304 (1980-07-01), D'Atre et al.
patent: 4255695 (1981-03-01), Plunkett et al.
patent: 4271385 (1981-06-01), Azusawa
patent: 4276505 (1981-06-01), Bose
patent: 4309643 (1982-01-01), Akamatsa
patent: 4328454 (1982-05-01), Okuyama et al.
patent: 4364004 (1982-12-01), Bourbean
IEEE Transactions on Industry Applications, Mar./Apr. 1979, vol. 1A-15, No. 2, by John Kosa, pp. 155-164.
Evans A.
Lorin C. M.
Rubinson G. Z.
Westinghouse Electric Corp.
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