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The main goal of increasing the number of phases in an induction machine is to ensure its performance in all the operating modes such as normal, disturbed and faulted settings. When the induction machine is working under a faulted mode such as one or more phases are missing, this leads to a high torque oscillations and bad tracking behaviour. Designing a suitable control design such as sliding mode...
A brushless DC motor (BLDCM) state equations based on speed error are established in this paper, and a sliding mode controller with a variable structure based on exponential reaching law is designed for speed regulation of BLDCM. Kalman Filter is used to improve the performance in the situation of noise disturbance. The control performances of variable-structure controller presented in this paper...
The paper presents comparison of two control techniques (a) sliding mode and (b) forced dynamics for control of electric drives employing permanent magnet synchronous motors with flexible coupling. The designed controllers are of the cascade structure, comprising an inner speed control loop and an outer position control loop. The inner speed control loop for both controllers is based on forced dynamics...
In this paper, a speed estimation and control strategy for induction motor drive based on an indirect field-oriented control is presented. The rotor speed estimator based on a RBF neural network utilizes stator voltage and current measured values to calculate the rotor speed, and the control approach based on a sliding-mode controller with an integral sliding surface is proposed in order to regulate...
Principles of forced dynamics control and sliding mode control are combined to derive control algorithm for position control of the drive with induction motor. The controller is of the cascade structure, comprising an inner speed control loop based on forced dynamics control and an outer position control loop based on sliding mode control. The inner speed control loop respects the principles of vector...
In this paper, an indirect field-oriented induction motor drive with a sliding-mode controller is presented. The proposed sliding-mode control law incorporates an adaptive switching gain that avoid calculating an upper limit of the system uncertainties. The design also includes rotor speed computation from measured stator terminal voltages and currents. The calculated speed is used as feedback in...
In this paper a robust nonlinear controller is presented for doubly-fed induction machine (DFIM) drives. The nonlinear controller is designed based on combination of Sliding-Mode (SM) and Adaptive-Backstepping control techniques. Using the fifth order model of DFIM in a stator d, q axis reference frames with stator currents and rotor fluxes as state variables, a SM controller is designed in order...
This paper presents the direct torque control (DTC) of an interior permanent magnet synchronous motor (IPMSM) based on sliding mode technique. Two adaptive cascade sliding mode controllers (ASMC) are designed; one for regulating the motor speed and the other is dedicated for controlling the electromagnetic torque. Consequently, the demerits of classical DTC (large torque and current ripples due to...
For the purpose of preventing a free-falling object from damage, this study is devoted to the landing posture control via trajectory planning for a generalized twin-body system by employing the methods of PD and sliding control. The system discussed herein is the simplified model of a free-falling cellular phone with two rotational DOFs. In this paper, the governing equations of the system are first...
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