Abstract
Energy mode functions and their inverse signal dynamics can be used for the design of controllers in classical control algorithms, which use the error signals of related system parameters in general mode. Different from this common approach, Lyapunov function-based controller design is preferred and motor mechanical speed parameter is incorporated into the control operation in this study. The results of the experimental studies conducted for this study prove that when both electrical and mechanical parameters of the system are taken into consideration, the proposed controller, nonlinear speed controller supported by direct torque controller and space vector modulation, performs better than classical controllers and can be realized successfully. DOI: http://dx.doi.org/10.5755/j01.eee.19.6.1970
Highlights
Direct torque control algorithms for induction motors use reference torque values
Required reference torque was created by using the reference speed value for direct torque controller (DTC)
The disadvantage of classical direct torque control systems is the use of inverter control modulator
Summary
Direct torque control algorithms for induction motors use reference torque values. Classical feedback controllers use speed error values for the transformation. Different system parameters are incorporated into the transformation for a better control operation [1], [2]. As it is well-known, resolution is important for controller calculations and frequency is important at time sharing switching operations [3], [4]. In this study, starting from the design of Lyapunov function-based nonlinear controller, mechanical speed value and speed error value are used for the control transformation. To obtain the required torque value, reference speed value is transformed by either classical speed control or nonlinear speed control methods. Required reference torque was created by using the reference speed value for direct torque controller (DTC)
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