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The PMSM motors are increasingly playing an important role in modern motor drives. A shaft encoder or sensor connected to the shaft of the motor provides feedback required for controlling torque and speed to the PMSM. So many motor drives are not abiding by the application of this feedback device because of their reliability concerns, price, and space and weight limitations. This paper analysis the...
In order to achieve sensorless control for permanent magnet synchronous motor (PMSM), an observer based on model reference adaptive system (MRAS) is designed to estimate the rotor speed according to the mathematic model. A speed sensorless vector control system is established and simulated with Simulink. Simulation results show that the MRAS-based control system, which is able to implement the speed...
Permanent magnet synchronous motors (PMSM) are appropriate for applications with load-independent speeds or synchronous operation with high accuracy under defined speed. In this paper analysis the structure and equations of the PMSM, direct torque control (DTC) and voltage space vector process then study model reference adaptive system (MRAS) estimators. The PI controller uses from estimate speed...
A novel speed sensorless direct torque control system-SVM-DTC of permanent magnet synchronous motor (PMSM) based on SVM and MRAS is presented. In this paper the various components of the speed sensorless SVM-DTC and the principle of realization are discussed in detail. Finally the simulation results with the application of MATLAB/Simulink show that the speed identification algorithm is accurate and...
Speed identification is important to apply the permanent magnet synchronous motor system on the situation that need speed signal but without speed sensor. Taking system dynamic mathematics model as the investigated subject, set up the speed identification adaptive system of the enhanced magnetism motor system on the basic of model reference adaptive system and POPOV's hyperstability theory. Derive...
One of the disadvantages of permanent magnet synchronous motors (PMSM) is the output torque ripples which degrade the performance of the system. Actual torque feedback to the system reduces output torque ripple but increases costs through the use of a torque transducer. Thus, a torque estimator which can provide accurate instantaneous torque feedback to the system will be highly desirable. However,...
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