Title :
A microprocessor-controlled speed regulator with instantaneous speed estimation for motor drives
Author :
Saito, Keiji ; Kamiyama, Kenzo ; Ohmae, Tsutomu ; Matsuda, Toshihiko
Author_Institution :
Hitachi Ltd., Ibaraki, Japan
fDate :
2/1/1988 12:00:00 AM
Abstract :
A method for estimating instantaneous speed, suited for a microprocessor-based speed regulator for motor drives, and the characteristics of the speed control system are described. Features of the proposed method include the estimation of instantaneous speed at a real-time point using values of average speed detected by counting for a certain time the output pulses of an encoder as well as the estimated value as the speed feedback signal for the speed regulator. Since this method allows compensation to be made for the lag time of the feedback signal caused by detection of the mean value, it contributes to improved stability of the speed regulator. In particular, this provides a significant suppression of the vibrations that are generated in motor-driven machinery
Keywords :
controllers; electric drives; electric motors; microcomputer applications; velocity control; instantaneous speed estimation; microprocessor-controlled speed regulator; motor drives; real-time point; Delay; Detectors; Milling machines; Motor drives; Output feedback; Regulators; Sampling methods; Signal detection; Stability; Velocity control;
Journal_Title :
Industrial Electronics, IEEE Transactions on
