Speed-sensorless sliding-mode torque control of an induction motor
Rodic, M.; Jezernik, K.
Industrial Electronics, IEEE Transactions on
Volume 49, Issue 1, Feb 2002 Page(s):87 - 95
Digital Object Identifier 10.1109/41.982252
Summary:Novel induction motor control optimizing both torque response and
efficiency is proposed in the paper. The main contribution of the paper
is a new structure of rotor flux observer aimed at the speed-sensorless
operation of an induction machine servo drive at both low and high
speed, where rapid speed changes can occur. The control differs from the
conventional field-oriented control. Stator and rotor flux in stator
fixed coordinates are controlled instead of the stator current
components in rotor field coordinates isd and isq.
In principle, the proposed method is based on driving the stator flux
toward the reference stator flux vector defined by the input command,
which are the reference torque and the reference rotor flux. The
magnitude and orientation angle of the rotor flux of the induction motor
are determined by the output of the closed-loop rotor flux observer
based on sliding-mode control and Lyapunov theory. Simulations and
experimental tests are provided to evaluate the consistency and
performance of the proposed control technique
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