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777 articles for “voltage (V)”
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A Modular Three Phase AC Voltage Controller for Induction Motor
Abstract: AbstractThree phase induction motor (IM) is widely used in the industries because of rugged construction. User needs to control speed of the motor depending on the desired speed and application. In this paper launching of speed control of 3-phase IM is controlled by 3-phase AC voltage controller by varying the voltage by pulsewidth modulation (PWM) technique. In olden days speed control was possible for DC motors only, but with the …
Published in Journal of Power Electronics and Power Systems · Vol. 3, Issue 3, 2013 · pp. 1–5 Read article
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Effect of Various Parameters on Threshold Voltage of Virtually Fabricated Lightly Doped PMOS Device
Abstract: This paper emphasis on the design, fabrication and analysis of 45 nm P type MOSFET device using SILVACO TCAD tool. The analysis was based on variation of various parameters like oxide thickness, threshold implant and halo implant (pockets) to analyze the threshold voltage. The drain versus gate and drain versus gate plots are being plotted using tony-plot. It has been observed that as the thickness of the oxide increases, threshold …
Published in Journal of VLSI Design Tools and Technology · Vol. 7, Issue 3, 2017 · pp. 13–20 Read article
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Voltage and Frequency Control of a Self Excited Induction Generator Using VSI
Abstract: In remote areas of a country where it is impossible or too expensive to access main power lines, one solution to obtain electric power is to use a small stand-alone hydro power plant. In such a situation, the turbine is been driven by a steady flow of water in a river. It is preferable to use a self-excited induction generator, due to its low cost an ruggedness. The voltage and …
Published in Trends in Electrical Engineering · Vol. 4, Issue 2, 2014 · pp. 13–20 Read article
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Voltage Stability Study based on New Evolutionary Algorithm
Abstract: This paper describes a PSO optimization algorithm for voltage stability study and its enhancement based on proximity and mechanism analysis. This theorem is implemented based on Gershgorin’s Circle Theorem. The control variables responsible for enhancing the voltage stability limit are generator bus voltages at PV buses, the taps of On-Load –Tap-Changing Transformer. (OLTC), change in reactive power etc. The objective function of proposed algorithm is to maximize the minimal diagonal …
Published in Trends in Electrical Engineering · Vol. 7, Issue 2, 2017 · pp. 21–31 Read article
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Strengthening Low Voltage Ride-Through in Wind Energy Systems: A Comparative Study of DVR and STATCOM
Abstract: This study looks at the various methods used to improve the low-voltage ride-through (LVRT) capabilities of wind turbine systems (WT) that are based on double-fed induction generators (DFIG). The Type-III WT machine, which is mostly based on DFIG, is instantly connected to the grid without the digital power interface, making the terminal voltage or reactive electricity output unmanageable. This is because the world utilizes between 20% and 25% of renewable …
Published in Journal of Power Electronics and Power Systems · Vol. 14, Issue 3, 2024 · pp. 47–62 Read article
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Study Stator Voltage Control Method for Induction Motor Torque Control using MATLAB Simulation
Abstract: AbstractThis paper presents a study stator voltage control method for induction motor torque control using MATLAB simulation. This is to improve induction motor speed control. Speed sensor is used to control the speed in feedback and complete simulation of the direct torque control in closed-loop. The system is to be tested by use a MATLAB/ Simulink program. The different control methods are used to control the speed of induction motor …
Published in Journal of Microcontroller Engineering and Applications · Vol. 4, Issue 3, 2017 · pp. 18–24 Read article
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A Comparative Analysis of Various Flipped Voltage Follower Cells
Abstract: Flipped voltage follower (FVF) cell is used for designing low-voltage/low-power analog circuits. It can operate with a single supply voltage, less than the sum of the threshold voltages of a PMOS and NMOS transistor. The three different configurations of the FVF cell namely conventional FVF, FVF using level shifter (FVFLS) and FVF using bulk driven technique (FVFBD) are presented. Various parameters such as input/output swing, gain, bandwidth and power dissipation …
Published in Journal of Microelectronics and Solid State Devices · Vol. 4, Issue 2, 2017 · pp. 1–8 Read article
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A Contribution to the Frequency and Transient Analysis of High Voltage Bushings
Abstract: The paper suggests a method for determining the frequency characteristics and transient response of capacitively graded high voltage bushings. It is based on an s-domain circuit model that describes the grading conducting foils and the insulating layers. In most cases, they are of different axial lengths. A system of simultaneous differential and algebraic equations is derived taking these differences into account. Its closed-form solution, subject to the boundary conditions, can …
Published in Journal of Power Electronics and Power Systems · Vol. 9, Issue 1, 2019 · pp. 15–26 Read article
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Analysis and Implementation of Carrier Based and Space Vector PWM Techniques on a Three-Phase Voltage Source Inverter
Abstract: This paper presents a comprehensive analysis of carrier based and space vector pulse width modulation (PWM) techniques on a two-level three-phase voltage source inverter (VSI). The results of simulations performed in Matlab/Simulink are compared to the results obtained from the implementation of the PWM schemes on an actual VSI whose PWM signals are generated using dSpace. The analysis of the inverter line to line voltages includes, a fast fourier transform …
Published in Journal of Power Electronics and Power Systems · Vol. 5, Issue 3, 2015 · pp. 125–139 Read article
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Evolutionary Particle Swarm Optimization (EPSO) based technique considering Voltage Stability Margin for Reactive Power Reserve Optimization
Abstract: Reactive power reserve and voltage stability are one of the important parameters required for proper operation of the electrical power system. Voltage stability covers a broad span of phenomena in power systems and its applications. Voltage stability is defined as ability of power system to assist fixed bearable potential at every single bus of the system under standard operating conditions and when put through to a disturbance. At any instant …
Published in Journal of Power Electronics and Power Systems · Vol. 11, Issue 2, 2021 · pp. 36–41 Read article
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Current Fed Push-Pull Converter for High Voltage Gain Applications
Abstract: AbstractAn isolated high step up voltage gain with appropriate duty ratio with application on energy storage system is proposed. As push pull converters are step down converters, here, this topology will help in step up the voltage. This converters semiconductor device maintains zero current switching (ZCS). Push pull converter has only two devices with common ground with source requiring simple gate driving circuitry.Keywords: Current fed push-pull, variable frequency modulation, zero …
Published in Journal of Semiconductor Devices and Circuits · Vol. 5, Issue 2, 2018 · pp. 33–42 Read article
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Low-Offset High Speed CMOS Voltage Comparator using 180 nm Technology
Abstract: A low Off-Set high-speed two-stage dynamic comparator is presented. In this circuit, PMOS transistors are used at the input of the first and second stages of the comparator. At the evaluation phase, the second stage is activated after the first stage with a predetermined delay to achieve a controllable pre-amplifier gain. Also, the first stage is turned off after the delay to reduce overall power consumption. Simulation results in 0.18µm …
Published in Journal of VLSI Design Tools and Technology · Vol. 7, Issue 3, 2017 · pp. 21–27 Read article
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Tuning Range, Phase Noise and Jitter Analysis of Current Starved Voltage Controlled Oscillator (VCO) for Digital PLL in 45 nm CMOS Technology
Abstract: A wide tuning range, low phase noise and low jitter 100 MHz Voltage-Controlled Oscillator (VCO) for DPLL was designed and implemented by 45 nm CMOS process technology using LT spice. There was a relation between the frequency tuning range, phase noise, and jitter at output of the VCO after linearizing the gain. Simulations using PTM 45 nm CMOS process technology shows, that a wide operation frequency range (tuning range) from …
Published in Journal of VLSI Design Tools and Technology · Vol. 5, Issue 2, 2015 · pp. 81–89 Read article
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Low-Voltage Low-Power Single Supply Rail-to-Rail High Resolution Comparator in 0.18 µm CMOS Technology
Abstract: This paper presents an absolute input rail-to-rail ultrahigh-resolution comparator for low-voltage low-power applications. To enhance the input range rail-to-rail, the proposed comparator utilizes dynamic configuration with a MOSFET-only clock booster to supply a boosted voltage for pre-amplifier stage. Cadence SPICE simulations of the proposed comparator in a 0.18 μm CMOS process confirm the rail-to-rail input range with a supply voltage of 1.2 V with a decision time less than 9 …
Published in Journal of VLSI Design Tools and Technology · Vol. 2, Issue 1-2-3, 2012 · pp. 87–91 Read article
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Effect of Various Parameters on Threshold Voltage of Virtually Fabricated Lightly Doped PMOS Device
Abstract: This paper emphasis on the design, fabrication and analysis of 45 nm P type MOSFET device using SILVACO TCAD tool. The analysis was based on variation of various parameters like oxide thickness, threshold implant and halo implant (pockets) to analyze the threshold voltage. The drain versus gate and drain versus gate plots are being plotted using tony-plot. It has been observed that as the thickness of the oxide increases, threshold …
Published in Journal of VLSI Design Tools and Technology · Vol. 7, Issue 2, 2017 · pp. 13–20 Read article
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Voltage Sag Mitigation with Different FACTS Devices: State of Art
Abstract: The power system's internal and external variables, however, have an impact on the quality of the power delivered. The system's performance suffers from harmonics, voltage, and frequency changes. Voltage fluctuation, a common issue with power quality, is covered in this paper. The most prevalent issue is a sag or dip in voltage. To solve this issue, there are several approaches. FACTS device usage is one of them and is effective. …
Published in Journal of VLSI Design Tools and Technology · Vol. 12, Issue 3, 2022 · pp. 29–34 Read article
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Analysis of 2-Stage Inverter Delay Line with Supply Voltage Variation
Abstract: Nowadays, the performance parameters should not affect the variation in fixed parameters like leakage current, leakage power, propagation delay, and power delay product. So this study is basically focused on the effects of changes in supply voltage (0.8–1.2V) on the various performance parameters of 2-stage inverter based delay line based on CMOS architecture. A delay line is a discrete element in digital theory, which simply allows a signal to be …
Published in Trends in Electrical Engineering · Vol. 9, Issue 1, 2019 · pp. 31–35 Read article
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BREAKDOWN VOLTAGE TEST OF DIFFERENT SOLID INSULATING MATERIALS USING ARTIFICIAL NEURAL NETWORK MODEL
Abstract: In this paper we are presenting Artificial Neural Network (MFNN) model which has different possible inputs affecting the breakdown voltage that are working temperature, the insulating material thickness, dielectric strength of insulating material, volume resistivity of materials, dissipation factor, conductivity of materials, and the materials relative permittivity that also predicts the breakdown voltage as a function of all these inputs parameters. It is important to train the Artificial Neural Network …
Published in Research & Reviews: A Journal of Embedded System & Applications · Vol. 6, Issue 2, 2018 · pp. 22–29 Read article
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A SIMULATION STUDY OF THE EFFICIENCY OF HIGH VOLTAGE α-Si STAND-ALONE PV INSTALLATIONS
Abstract: The paper analyzes different configurations, direct-PV, PV-battery, either with PWM or MPPregulator, and hybrid-PV, of stand-alone PV installation operating with high voltage α-Si panels thatsupplies energy to a DC-AC external circuit. Global efficiency is determined as a function of voltageconversion ratio and individual element efficiency. The paper concludes that direct-PV is the mostefficient mode with average performance ratio (PR) of 92.2% followed by PV-battery with MPPT,68.3% of efficiency, and PWM …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 12, Issue 2, 2021 · pp. 1–11 Read article
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Self-tuning Adaptive Control of Rotor Voltage of Doubly Fed Induction Generator in Wind Farms
Abstract: The dynamic performance of a doubly fed induction generator (DFIG) in the wind farms can be enhanced through appropriate converter controls. This article presents a self-tuning control strategy for a DFIG rotor voltage which employs pole-shift technique in the discrete system model. From a large number of simulation studies involving various types of disturbances covering a range of operating conditions, it was observed that the online adaptive model based control …
Published in Journal of Control & Instrumentation · Vol. 8, Issue 1, 2017 · pp. 17–29 Read article