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This paper deals with the sensorless direct torque control (DTC) scheme for the permanent magnet synchronous motor (PMSM), where a new estimation algorithm is developed based on the polynomial chaos theory and the extended Kalman filter (EKF) for the sensorless obtaining of the rotor speed, stator flux and electromagnetic torque. The proposed estimator can effectively deal with parametric uncertainties...
This paper aims to present a sensorless indirect field oriented control (IFOC) associated with an intelligent technique based on fuzzy logic controllers (FLC) in purpose to guarantee fast response and to improve the dynamic performance of a three-phase squirrel cage induction motor drive (SCIM). These regulators are used instead of the classical IP ones and are applied in speed and stator currents...
This paper presents a maximum power point tracking algorithm (MPPT) and sensorless control for permanent magnet generators associated with small scale wind turbines. The basis for the wind energy conversion is presented to model the wind turbine emulator test-rig and support the proposed MPPT algorithm. The maximum power point tracking algorithm is based on estimations of the load torque and shaft...
Wind speed estimation is an important issue when addressing the control or the monitoring of a wind turbine. A realistic value of wind speed could be very useful to improve performance of wind turbine controllers, either for scheduling or as an extra feed forward term. In addition, it could also be useful for fault diagnosis and fault-tolerant control of the wind turbine. The objective of this work...
This paper presents the real-time implementation of a bi input-extended Kalman filter (EKF) (BI-EKF)-based estimator in order to overcome the simultaneous estimation problem of the variations in stator resistance and rotor resistance aside from the load torque and all states required for the speed-sensorless control of induction motors (IMs) in the wide speed range. BI-EKF...
This paper presents a sensorless control strategy for a doubly fed induction machine, usually used as a generator for wind power. The proposed scheme consists of an Extended Kalman Filter fed by the voltages and currents of the stator and rotor in order to provide an estimation of the speed and position of the rotor. The simulation results prove the scheme's feasibility over a wide range of speed...
This paper presents a comparative study of two sensorless Permanent Magnet Synchronous Motor drive control algorithms using an optimal two stage extended Kalman filter. Beside the estimation of position and rotor velocity with and without the estimation of load torque is considered. An algorithm proposed by C.S. Hsieh and F.C. Chen in 1999 for linear parameter estimation is extended to the non-linear...
This paper presents the direct torque control (DTC) of a permanent magnets synchronous machine without mechanical speed and position sensors. Those are estimated by using the extended Kalman filter (EKF). The direct torque control (DTC) technique for PMSM is receiving increasing attention due to the important advantages the low dependence on motor parameters when compared with other motor control...
In an increasing number of applications highly dynamic electrical drives, characterized by high quality torque control, are demanded. Direct torque control (DTC) for AC machines, permanent magnet synchronous motors (PMSM) or induction machines, can provide this accurate and fast torque control. When applying DTC the change of the stator flux linkage vector is controlled, based on torque and flux errors...
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