Tulasi Ram Das

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This paper presents the application of fuzzy logic technique to reduce torque ripples in an induction motor drive employing direct torque control (DTC). The DTC is characterized by the absence of PI regulators, coordinate transformations, current regulators and PWM signals. The main draw back of DTC is its high torque ripples. In this proposed technique,(More)
This paper presents the application of Space Vector Pulse Width Modulation (SVPWM) technique to reduce torque ripple in an induction motor employing Direct Torque Control (DTC). The effective time is determined using imaginary time vector there by the lengthy procedure of using reference voltage vector is eliminated. Also the sector identification and angle(More)
This paper shows the application of fuzzy logic based duty ratio control technique to reduce torque ripple in an induction motor employing Direct Torque Control (DTC). This technique increases the number of voltage vectors beyond the available eight discrete voltage vectors without any increase in the number of semiconductor switches in the inverter.(More)
– The switched reluctance motor (SRM) is an older member of the electric machines family. Its simple structure, ruggedness and inexpensive manufacturing potential make it extremely attractive for industrial applications. However, these merits are overshadowed by its inherent high torque ripple, acoustic noise and difficulty to control. In this paper, a(More)
— Direct torque control (DTC) has over the years, become one of the most popular methods of control for induction motors (IM) drive systems. The advances in FPGA technology have been extraordinary. Numerous industrial applications such as power control or automotive appliances require high speed, very large number of components, abundance of available(More)
Drought stress is the major environmental constraint contributing to grain yield instability of wheat. In the present study, the recombinant inbred line population derived from DBW43/HI1500 cross was characterized for various morpho-physiological traits as well as grain yield stability analysis under moisture stress. The population was evaluated for grain(More)
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