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A new sensorless direct torque control scheme for matrix converter-fed interior permanent magnet synchronous machine is investigated in this paper. Comparing to the classical DTC, the proposed scheme features in low ripples in torque and flux, fixed switching frequency and unity input power factor. Moreover, it significantly reduces the harmonics in the input current even with a small input filter...
The main aim of this paper is to explore the various dynamic controllers for regulating the reactive power requirements of grid connected wind farms. A wind farm of total capacity 7.5 MW is considered for the study. The turbines are of fixed-speed type that are equipped with squirrel-cage induction generators. The emerging devices suggested for the control of the reactive power requirement of wind...
This paper presents a sensorless hysteresis direct torque control method using matrix converter fed IPM synchronous motor. This method allows a reduction of the harmonic content of the input current without any negative effect on the drive performance. The merits of the original HDTC scheme, simplicity, robustness and high dynamics, are preserved. Moreover, by applying two input vectors at each cycle,...
This paper presents a modified direct torque control scheme for matrix converter drives. This method allows a reduction of the harmonic content of the input current without any negative effect on the drive performance and its simplicity. By using two switching configurations at each cycle, the synthesis of the input current vector is more accurate than the previous method at the same sampling period,...
This paper presents an improved direct torque control (DTC) method for sensorless matrix converter drives using a multi-mode indirect space vector modulation (ISVM) and an adaptive sliding mode observer. The drive system is characterized by reduced torque and flux ripples, unity input power factor, sinusoidal input/output waveforms and good sensorless control performance over a wide speed range, while...
An improved direct torque control (DTC) scheme for the matrix converter fed Interior Permanent Magnet Synchronous Machine (IPMSM) is presented in this paper. In the proposed scheme, the modified DTC strategy for matrix converter IPMSM drives is achieved using a variable-structure torque and stator flux controller, and indirect space vector modulation (ISVM) technique. It features low torque and flux...
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