This paper presents a simple approach to design and implementation of Direct Torque Control (DTC) of three phase squirrel cage induction motor using Matlab/Simulink and FPGA software. The direct torque control of induction machine is a simple control. To maintain this simple control structure while at the same time improving the performance of the DTC drives two simple new techniques i.e. const...

This paper presents a new approach for the simultaneous identification of rotor flux components in the rotor reference frame and electrical parameters of a vector controlled induction motor, for real-time implementations, using an extended Kalman filter (EKF) and a reduced order model structure for lower computational effort. The proposed new method requires the measurement of motor speed, stat...

One challenge to predict output performance characteristics of switched reluctance machines (SRM) is the accurate estimation of the minimum inductance of the stator phase at unaligned position of the rotor. In this paper, boundary element method (BEM) is used for this purpose while avoiding time-consuming numerical integrations. So, the method is investigated in terms of accuracy and computatio...

A vector control of an induction motor by an estimated speed using an extended Kalman filter is proposed. With this method, the states are composed of stator current and rotor flux. The rotor speed is regarded as a parameter, and the composite states consist of the original states and the rotor speed. The extended Kalman filter is employed to identify the speed of an induction motor and rotor f...

This paper presents the detailed mathematical and Simulink® model of a two-phase stepper BLDC motor in the machine variables, proving the rotor's position role in supplying the motor. Then an extended Kalman filter (EKF) is designed to estimate the motor state variables: stator currents, and the rotor position and velocity, on the basis of noisy measurements of stator currents, since it has a n...

As the mechanical sensor of PMSM easily break out, attentions are paid to the PMSM sensorless control method. In this paper, a modified stator flux methods based on the active flux is proposed, which can estimate the rotor position and speed of the motor after accurate stator flux estimation using active flux. This method is of simple calculation and less dependence on motor parameters, and it ...

This paper presents a different technique for the online stator resistance estimation using particle swarm optimization (PSO) based algorithm rotor flux oriented control schemes of induction motor drives without speed sensor. First, conventional proportional-integral controller-based is used sensorless scheme with two model reference adaptive system (MRAS) concepts. Finally, novel method on PSO...

This paper proposes a new full-order adaptive observer algorithm to overcome the instability of speed sensorless vector control system induction motor at low speed, especially extremely speed. The consists improved feedback matrix and law algorithm. By establishing an state error equation considering non-linear voltage inverter stator resistance drop, was designed reduce effect inverter's drop ...

In turbomachines, dry friction resulting from stator–rotor contacts is a severe problem that may degrade lifetime of the machine or even lead to complete failure. Knowledge about system states and contact forces beneficial for monitoring prevent through, e.g., active magnetic bearings. this paper, nonlinear model derived describes lateral rotor vibrations in case no contact. The elastic behavio...

In this paper a sliding-mode torque and flux control is designed for encoderless synchronous reluctance motor drive. The sliding-mode plus PI controllers are designed in the stator-flux field oriented reference frame which is able to track the mentioned reference signals with a minimum pulsations in the state condition. In addition, with these controllers a fast dynamic response is also achieve...