Conference Paper

Comparison of two position and speed estimation techniques used in PMSM sensorless vector control

Ecole Nat. des Sci. Appl., Marrakech MESESYP Lab., Marrakech
DOI: 10.1049/cp:20080597 Conference: Power Electronics, Machines and Drives, 2008. PEMD 2008. 4th IET Conference on
Source: IEEE Xplore


The paper describes the comparison between two different high-performance techniques used for the sensorless estimation of the motor shaft position in Permanent Magnet Synchronous Motor Sensorless Drives. Rotor position and speed are estimated from measured terminal voltages and currents, and are used as feedback in a sensorless vector control scheme, achieving almost the same high-performance of a sensored drive. The paper point out the differences, by using experimental implementation, between an open-loop flux estimator based on the electrical model of the machine, and a reduced flux observer.

5 Reads
  • [Show abstract] [Hide abstract]
    ABSTRACT: Vector control of permanent magnet synchronous machine PMSM is one of the new techniques have been developed in recent years. It's based on the use of measures from the mechanical sensor. In order to reduce the cost and improve the reliability of this variable speed drive, the paper presents a control method without sensor using the estimation of the electromotive force EMF to determine the speed and the position. The resulting algorithm is implemented in embedded dasiaCpsila language on DSP board and tested on 500 W PMSM.
    Multimedia Computing and Systems, 2009. ICMCS '09. International Conference on; 05/2009
  • [Show abstract] [Hide abstract]
    ABSTRACT: The sensorless control method for the high speed permanent magnet synchronous machine without position and speed sensor in the start process of a 30 kW microturbine generation system is investigated in this paper. The open-loop speed control mode based on current control is applied at low speed, and the closed-loop sensorless vector control mode is used at medium and high speed. The rotor position and speed estimation algorithm is implemented using an open-loop observer based on back-EMF in the vector control. On the basis of detailed description of the proposed start-up strategy, the simulation and experimental system has been built. Several critical issues were analyzed, including the setting method of the reference speed profile in open-loop mode and the transition time selection from open-loop mode to closed vector control. The simulation and experimental results demonstrate the proposed sensorless control method can meet the requirements of the start process for microtubine generation system, and possesses high static and dynamic performance at large-scale speed.
    Information and Automation (ICIA), 2010 IEEE International Conference on; 07/2010
  • [Show abstract] [Hide abstract]
    ABSTRACT: The paper presents an EMF and speed estimator for the nonsalient permanent magnet synchronous motor (PMSM). The method uses two cascaded sliding mode (SM) observers and is realized using only the measured voltages and currents of the motor. A first SM observer estimates the EMFs of the machine in the stationary reference frame. These EMFs are passed as inputs to a second SM observer that estimates the motor speed and re-estimates the EMFs. The method is applicable in a sensorless PMSM speed control scheme where the estimated EMFs are used to obtain the rotor position and the estimated speed is used for speed feedback. The paper verifies the existence conditions of the sliding mode motion and proves the convergence of the observers. The theoretical findings are validated with simulation results that show that the estimated EMFs and speed are of good quality. The advantages of the proposed method compared to the state of the art are discussed.
    11/2010; DOI:10.1109/IECON.2010.5675213
Show more