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This paper presents a comparison between Field Oriented Control and Direct Torque Control methods of a Matrix Converter-fed (MC) Permanent Magnet Synchronous Motor (PMSM). MC is becoming widely used because of the unity power factor and the lack of energy storage element. FOC method calculates the duty of MC states with use of geometric relations between voltage and current vectors. DTC method, on...
The mechanical inertial load holds a dominant position in all load simulation types and usually is simulated with mechanical flywheel, which may causes the complex structure, the high cost, installation, the inertia adjustment inconvenient and so on. According to these insufficiencies, this paper carries on design and research to the dynamic load simulation test platform, which using Permanent Magnet...
Direct torque control (DTC) of five-phase PMSMs has been investigated in many literatures. Besides many advantages of this method, large harmonic currents is one the major drawbacks of this scheme. Space vector modulation (SVM) methods have been applied to DTC algorithm to eliminate this problem. But it should be mentioned that SVM methods have complicated calculations. This paper proposes a simple...
After establishing the permanent magnetism synchronous machine (PMSM) twelve sectors direct torque control (DTC) platform, in this paper, the relation between torque and minimum stator currents while maximum torque per ampere (MTPA) is deduced using Lagrange multiplier method, and the optimal excitation current is obtained using the curve fitting method, and then the optimal stator flux instruction...
After establishing the 12 sectors direct torque control (DTC) platform of permanent magnetism synchronous machine (PMSM), in this paper, we established the smallest loss model by calculating the copper and iron loss of PMSM, and then promoted the system efficiency by calculating the optimal field current and instruction value of stator flux linkage. Simulation experiments show that the new scheme...
There are big ripples on current and flux linkage and electromagnet torque under traditional direct torque control (DTC) on motor drive system. To solve these problems, fuzzy controller is designed to instead traditional hysteretic comparator, and zero voltage vectors are used to further reduce ripples. Rotor speed is estimated online by extended Kalman filter (EKF) algorithm. Speed sensorless DTC...
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