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In order to improve the discretization accuracy of discrete full-order flux observer, a modified discretization approach based full-order flux observer is proposed for sensorless induction motor drive. The presented method possesses higher precision without complex decoupling calculations. The experimental results verify the effectiveness of the proposed algorithm.
This paper proposes a method to estimate the electrical parameters of Induction Motors, The electrical parameters are obtained by solving a least squares minimization problem, the method conceived to be used estimate parameters with the vector control strategy and the M sequence disturbing on the reference voltage. And experimental results are used to demonstrate the feasibility of the propose method.
Field oriented control doesn't correspond to features of synchronous motor as good as it does to induction motor. Special control algorithm is proposed to provide operation, suitable for mass high-power drives. The solution is implemented and tested in two fan drives, 3.15 MW each, now in operation at a diamond mine in North-East Siberia.
This paper describes a novel approach for identifying induction motor electrical parameters in function of flux levels based on experimental transient measurements from a vector controlled induction motor (I.M.) drive and using an off line genetic algorithm (GA) routine with a linear machine model. The evaluation of the electrical motor parameters is achieved by minimizing the error between experimental...
The realization of a vector control for the operation of induction motors often takes advantage of ordinary equivalent circuit models. Some simplified models are consisting of a reduced number of system parameters and allow a very basically identification procedure by no-load tests in the lab. Fictive identification tests could fortunately be carried out by the finite element method during the development...
This paper presents a new loss-model-based controller for an induction motor drive. Among the many loss minimization algorithms (LMA) for an induction motor, a loss-model-based approach has the advantages of fast response and high accuracy. However, the performance of the loss-model controller (LMC) depends on the accuracy of the modeling of the motor drive and losses. In the development of the loss...
In this paper, analytical functions for output torque and rotor flux of indirect vector controlled induction motor are defined and analyzed. According to the defined functions, the effect of parameter variations over outputs of vector controller can be determined. Matlab/simulink based simulations is carried out to confirm the results of the analytical functions
This paper proposes a sensorless rotor temperature estimator for small to medium size mains-fed induction machines. With measurements obtained from only current and voltage sensors, the proposed estimator can capture the rotor temperature in an online fashion. First the rotor speed is extracted from the current harmonic spectrum based on the estimated rotor slot and eccentricity harmonic frequencies...
This paper demonstrates the implementation of field-oriented control and rotor current estimation of an induction machine. A mathematical model was developed in Matlab/Simulink. A control system was implemented on a three-phase wound field induction motor to confirm the proposed method and estimated rotor currents. A dSPCAE embedded real time controller is used to implement the control and experimental...
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