The aim of this paper is to implement a sensorless indirect rotor-flux-oriented control (IRFOC) of induction motor (IM) drives. Indeed, the proposed method for speed estimation is based on Luenberger state observer (LSO). The adaptive rotor speed is actually derived from Lyapunov stability theory by using measured and estimated stator currents and estimated rotor flux. The proposed control sche...

The algorithmic structure of a vector controller capable of high quality speed control of a synchronous reluctance motor with and without the use of a rotor position sensor is presented in this paper. The controller is based on a conventional saturated machine d-q model. Its main merit is that it can be operated in a sensorless control mode by executing a new, very accurate parameter dependent ...

Permanent magnet brushless DC (PMBLDC) motors are the latest choice of researchers due to their high efficiency, silent operation, compact size, high reliability and low maintenance requirements. These motors are preferred for numerous applications; however, most of them require sensorless control of these motors. The operation of PMBLDC motors requires rotor-position sensing for controlling th...

A characterization of the rotor losses in single-sided axialflux permanent-magnet (AFPM) machines fitted with nonoverlapped windings (NOW) is presented in this paper, through experimental validation of finite element analysis (FEA) estimates. A literature review detailing the previous work done in the area of rotor loss estimation is given and the approaches taken by the authors to model the AF...

Abstract This article presents an active current sensor (CS) fault-tolerant control (FTC) strategy for induction motor (IM) drive with adaptation of rotor and stator resistances. The estimator online resistance parameters was applied the reconstruction missing signals. A model reference adaptive system (MRAS), based on a neural network (NN), used to estimate resistance. Additionally, estimation...

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 sensorless control of switched reluctance motor (SRM) driven by the four phase asymmetric bridge inverter. In this method to obtain the rotor position of switched reluctance motor by means of resonant circuit method. The resonant circuit comprising of the motor and the power electronic converter, motor phase inductance and the parasitic capacitance of converter switches. F...

This paper presents an improved method of estimating flux angle, rotor position, and velocity by tracking the position of spatial saliencies in an ac machine. Specifically, a machine model is presented which accurately models the behavior of ac machines with multiple spatial harmonic saliencies. The effects of multiple spatial harmonic saliencies on the estimation of flux angle, position, and v...

This paper presents an efficient design tool for the estimation of the transient electromagnetic peak torque and transient rotor over-voltages of wind turbines (WT) doubly-fed induction generators (DFIG) during severe fault conditions on the grid side. This versatile and robust tool is well adapted to the implementation in a DFIG drives CAD environment using iterative optimization procedures. I...