H - Electricity – 02 – P
Patent
H - Electricity
02
P
318/103
H02P 21/10 (2006.01) H02P 21/00 (2006.01)
Patent
CA 1198156
22 ABSTRACT OF THE DISCLOSURE The procedure described is based on a computa- tion of the rotor emf of the asynchronous motor and hence of the slip or of a slip-proportional current component as obtained solely from measurements at the terminals. Th instantaneous values of the required stator voltage or of the required stator current are formed with the computed signals either via a data-supported regulating circuit or by direct orientation on the space vector of the rotor emf, and fed with the aid of a fast electric controller to the motor. Using the described procedure, it is possible, among other things, to obtain torque or rotational speed control with good dynamic behavior. The procedure has the advantage of requiring low parameter sensitivity and the capability of dispensing with sensors on the motor.
424945
Jotten Robert H.
Mader Gerhard U.
Oldham And Company
Westinghouse Electric Corporation
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