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To produce useful form of energy without causing any harm to the environment is a continuing challenge. This puts human-kind in a pursuit of green energy sources, one among which is the fuel cell technology. Fuel cells has always been an element of interest for the past few decades. But the technology is still in its crib. Research is still being carried out to avail it for daily use at a cheaper...
This paper describes the implementation of multirate sampling technique for carrier space vector pulse width modulation based direct torque control (CSVPWM DTC) of induction motor (IM) drive with an objective to reduce the electromagnetic torque ripple. The benefit of the proposed technique for CSVPWM DTC based IM drive; it gives lower torque ripple as compared to single rate sampling technique. In...
This paper illustrates the implementation of the direct torque control (DTC) strategy for induction motor (IM) drive using carrier space vector pulse width modulation technique. In the present work, the algorithm used for DTC based control of IM is Carrier Space Vector Pulse Width Modulation (CSVPWM) technique. A comparison of performance between standard and carrier based SVPWM techniques have been...
Present work relates to improved operation of a 3-phase matrix converter using simple modulation strategy. A simple approach for input displacement power factor control is described, which can make the matrix converter as a source or sink of controlled reactive power. Novel feature of this investigation is the study relating to parallel operation of two matrix converters, from the point of view of...
In the present work a novel strategy for optimum design of flux and torque controller for carrier space vector pulse width modulation based direct torque control (CSVPWM DTC) of induction motor (IM) drive has been implemented. Two positive and one negative torque slope levels per half the switching period has been predicted for CSVPWM DTC IM drive based on which a new optimal control strategy is proposed...
A new scheme for a 4-level Static Compensator (STATCOM) integrating two 2-Level converters, supplying / absorbing reactive power to / from the grid is proposed in this paper. Reduced component count and simpler layout of switches are the attractive features of the proposed topology over the existing diode clamped multilevel converter. Furthermore, less number of dc links and smaller dc link capacitor...
Grid connected unity power factor converters based on one cycle control (OCC) do not require the service of PLL or any other synchronization circuits for interfacing with the utility. As a result, these schemes are becoming increasingly popular. However, as the power handled by the converter increases, the power factor deteriorates. To understand quantitatively the cause of poor power factor while...
A new three-phase, three-level dc to dc phase shifted pulsewidth modulation (PWM) converter is proposed for high power and high input voltage applications. Output voltage is controlled by incorporating phase shift PWM. Clocked gate signals of each leg are phase shifted by 2pi/3 from each other. Major features of the converter include: (1) outer two switches of each leg are turned on and off as zero...
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