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This paper presents the dynamic modeling and simulation of a feedback linearization scheme for high performance induction motor control which decouples the rotor flux and the rotor speed (torque) control loop. In this scheme the controller takes rotor flux from the feedback path and uses it for the cancellation of nonlinearity present in the rotor flux and the rotor speed control signal. As direct...
Small displacement equations valid for small excursions about an operating point are established from the machine equations expressed in synchronously rotating reference frame. The conventional form of d-q model used for drive simulation has limitations in predicting the machine performance. It is possible that, accurate results for fundamental component of current and average torque near rated operating...
This paper presents employment of adaptive deadbeat current controllers in vector control scheme working in rotor flux coordinates. The parameter changes cause the deterioration of control performance in high precision AC induction motor drives. The adaptive controllers with online identification keep the performance on a high level. On-line identification gives the estimate of the motor parameters...
When the motor speed is reduced by using a regenerative brake, the mechanical energy of rotation can be converted to the regenerative electric energy. In order to improve the efficiency of the motor drive systems, the regenerative power is charged and discharged by power storage systems (PSS). Moreover, optimal regenerative and acceleration torque of the motor should be discussed in order to maximize...
A new modulation and control strategy for a matrix converter induction motor drive is presented in this paper. A discrete model of the converter, motor and input filter is used to predict the behaviour of torque, flux and input power of the system. The switching state that optimizes the value of a quality function is selected. The predictive control method, referred to as predictive torque control...
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...
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