In this paper a Model Reference Adaptive System (MRAS) is presented as the speed estimation technique in which the error speed is estimated by comparing reference model and adaptive model and further the error speed is used to obtain the rotor speed. Proportional Integral (PI) is designed for controlling purpose. A non-linear fuzzy-PI controller is used to optimize the speed error value. The Pr...

n this paper work, sensorless speed control of three phase induction motor is to be carried out using predictive current method and space vector PWM. A closed loop estimation system is proposed with robustness against motor parameters variation is used for the control approach. The novelty of the presented solution is the integration of a simple observer for both speed/flux and current control ...

The paper deals with a new type of observer for the rotor flux and speed of the induction motor. The new observer is designed to be used within a speed sensorless direct rotor field oriented control of induction motors. In order to present the performances of the new observer, it was compared to extended Luenberger observer. The comparative analysis was simulated using Matlab – Simulink – dSPAC...

• Robust sensorless commutation control. • External speed reference. • Overcurrent detection/protection. • Basic speed controller included. • Full source code in C. • Source code can be adapted to a new motor by changing parameters. • Several I/O pins/peripherals not used for motor control. Can be used for other purposes, such as status LEDs, communication or user input. • Works without modific...

In industry speed estimation is one of the most important issue for monitoring and controlling systems. These kind of processes require costly measurement equipment. This issue can be eliminated by designing a sensorless system. In this paper we present a sensorless algorithm to estimate shaft speed of a dc motor for closed-loop control using an Artificial Neural Network (ANN). The method is ba...

SIMULATION OF POWER CONTROL OF A WIND TURBINE PERMANENT MAGNET SYNCHRONOUS GENERATOR SYSTEM Nantao Huang, B.S. Marquette University, 2013 This thesis presents a control system for a 2MW direct-drive permanent magnet synchronous generator wind turbine system with the objectives to capture the optimal power from the wind and ensure a maximum efficiency for this system. Moreover, in order to elimi...

sensorless speed torque control of induction machines has been widely used in many industrial applications. the simple method of direct vector control can provide tacholess control as well as more complex approaches. in this method, the motor flux can be obtained by measuring voltage and current and integrating motor back electromotive force. the only required motor parameter is stator resistan...

This paper focuses on the so-called sensorless speed-tracking control for permanent magnet synchronous motors. A control strategy is proposed allowing to extract rotor position using electrical signals and an observer of electrical variables, and to guarantee the robust asymptotical tracking of a reference speed without measuring rotor velocity and position. Bounded parameter variations are sup...

The application of flux-observer-based sensorless control to permanent-magnet brushless ac motor drives is described. Current methods of speed estimation are assessed, both theoretically and experimentally, and an improved method, which combines the best features of methods in which speed is derived from the differential of rotor position and from the ratio of the electromotive force to excitat...

This paper presents a speed sensorless rotor flux estimation algorithm in a vector controlled induction motor drive. The proposed method is based on observing a newly defined state which replaces the unknown terms containing rotor flux and speed on right hand side of the state equation of the motor. A new mathematical model of the motor is derived after introducing the above mentioned sate. Rot...