Senseless vector control of inductionmotor based on stator flux orientation;

Induction motor speed sensorless system using stator flux orientation

To settle the coupling problem in flux orientation,it is suggested that a stator flux orientation control mode without decoupler and an extended state observer(ESO) is adopted to compensate the coupled part.

Based on the principle of energy conversion,the rotor field-orientation control decouples not only flux linkage and electro-magnetic torque but also rotor transformer electromotive force and rotating electromotive force.

Under the environment of Matlab/Simulink,rotor-flux-oriented vector control simulation model of PMSM based on consideration of iron loss was set up.

Under the environment of Matlab/Simulink,rotor-flux-oriented vector control simulation model of PMSM was set up.

Considering this strong coupled complicated nonlinear system,a control system is proposed in which a nonlinear control algorithm based on rotor flux orientation of motor winding is used and the needed air-gap-flux of motor winding in radial levitation controller is obtained by I-ω law.

In order to improve the performance of speed estimator,rotor flux orientation is adopted to realize flux and torque decoupling.

In this paper,a novel method of rotor resistance adaptive identification based on rotor flux orientation is proposed.

This paper describes the principle of field orientation-a new closed-loop control method for rotating-field machines.

In an induction motor field orientation vector control system,the rotor time constant may be deviated due to motor temperature variation and flux saturation.