Title :
An improved stator flux estimation for speed sensorless stator flux orientation control of induction motors
Author :
Shin, Myoung-Ho ; Hyun, Dong-seok ; Cho, Soon-Bong ; Choe, Song-Yul
Author_Institution :
Dept. of Electr. Eng., Hanyang Univ., Seoul, South Korea
fDate :
3/1/2000 12:00:00 AM
Abstract :
This paper proposes a programmable low pass filter (LPF) to estimate stator flux for speed sensorless stator flux orientation control of induction motors. The programmable LPF is developed to solve the DC drift problem associated with a pure integrator and a LPF. The pole of the programmable LPF is located far from the origin in order to decrease the time constant with the increasing speed. In addition, the programmable LPF has a phase/gain compensator to estimate exactly stator flux in a wide speed range. Consequently, the drift problem is much improved and the stator flux is exactly estimated in the wide speed range. The validity of the proposed programmable LPF is verified by speed sensorless vector control of a 2.2 kW three-phase induction motor
Keywords :
control system synthesis; filtering theory; induction motors; low-pass filters; machine theory; machine vector control; magnetic flux; parameter estimation; stators; velocity control; 2.2 kW; DC drift problem; phase/gain compensator; programmable low pass filter; speed sensorless stator flux oriented control; stator flux estimation; three-phase induction motors; time constant; vector control; Cutoff frequency; Digital filters; Frequency estimation; Induction motors; Low pass filters; Machine vector control; Phase estimation; Position control; Stators; Synchronous motors;
Journal_Title :
Power Electronics, IEEE Transactions on
