Abstract
A speed tracking control method for induction machine is shown in this paper. The method consists of outer speed control loop and inner current control loop. Model predictive current control method without the need for calculation of the weighing factors is utilized for the inner control loop, which generates a continuous set of voltage reference values that can be modulated and applied by the inverter to the induction machine. Interesting parallels are drawn between the developed method and state feedback principles that helped with the analysis of the stability and controllability. Simple speed and rotor flux estimator is implemented that helps achieve sensorless control. Simulation is conducted and the method shows great performance for speed tracking in a steady state, and during transients as well. Additionally, compared to the finite control set predictive current control, it shows less harmonic content in the generated torque on the rotor shaft.
Highlights
Current Control for InductionInduction machines are crucial part of today’s world industry because of their robustness and power per volume
Methods that revolutionized the field of induction machine control are field oriented control (FOC), developed in the seventies by Hasse and Blaschke which are presented in their Ph.D. thesis [1,2] and direct torque control (DTC), developed in the eighties by Takahashi and Noguchi [3]
Ahmed et al describe a simple approach to continuous control set predictive current control (PCC) in [29,30], where a specific weighing factor matrix is calculated in order to limit commanded stator voltage of the induction machine
Summary
Induction machines are crucial part of today’s world industry because of their robustness and power per volume. Ahmed et al describe a simple approach to continuous control set PCC in [29,30], where a specific weighing factor matrix is calculated in order to limit commanded stator voltage of the induction machine. These methods eliminate the problems that are introduced by finite control set methods. Authors present a continuous control set predictive current control of the induction machine without the need for calculation of the weighing factors.
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