H - Electricity – 02 – P
Patent
H - Electricity
02
P
H02P 5/00 (2006.01) H03H 17/02 (2006.01)
Patent
CA 2069582
A procedure is disclosed for filtering the speed feedback signal in an elevator motor drive which is provided with a speed controller and in which the speed of rotation of the motor is measured. The procedure of the invention involves sampling the speed feedback signal, producing a prediction of the next sample by a predicting procedure that filters the noise in the speed feedback signal, and forming an estimate of the latest sample by delaying the prediction by a time corresponding to one sample.
G. Ronald Bell & Associates
Kone Corporation
Ovaska Seppo
LandOfFree
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