Result Details
Hybrid Speed Estimation Scheme for AC Induction Machine Sensorless Control
Blaha Petr, doc. Ing., Ph.D., CAMAT (FEEC)
Control of drives based on AC induction motors
is a quite complex task. Provided the vector control algorithm is used we need to know not only the rotor speed but also the position of the magnetic flux inside the motor during the control
process. In most applications the flux sensors are omitted and the magnetic flux phasor position has to be calculated. But there are also applications in which even speed sensors should be omitted. In such a situation, we have to solve the task of state reconstruction only from voltage and currents measurements. In the current paper, we present a method based on deterministic evaluation of measurement using the state observer based on Lyapunov function. It is also shown, that the
main problem of speed estimation accuracy is closely tied to the knowledge of actual rotor resistance value. A simple method of rotor resistance estimation based on rotor slot harmonics
analysis is proposed. Algorithm has been proved in testing on a small 250W AC induction machine.
induction machine, speed estimation, rotor resistance
@inproceedings{BUT15018,
author="Pavel {Václavek} and Petr {Blaha}",
title="Hybrid Speed Estimation Scheme for AC Induction Machine Sensorless Control",
booktitle="Proceedings of the 2005 IEEE Conference on Control Applications",
year="2005",
pages="1455--1460",
publisher="IEEE",
address="Toronto",
isbn="0-7803-9353-8"
}