Results 51 to 60 of about 387,123 (341)
Revue des Énergies Renouvelables, 2020 This paper presents the implementation of perturb and observe maximum power point tracking algorithm with Duty Cycle Modulation instead of pulse width modulator for photovoltaic power generators.
Theodore Louossi +3 more
doaj
Transistor servo system including a unique differential amplifier circuit Patent [PDF]
, 1970 Electric motor control system with pulse width modulation for providing automatic null seeking ...
Currie, J. R., Nola, F. J.
core +1 more source
Online control of AC/AC converter based SHEPWM technique [PDF]
, 2014 Conventional online control of AC/AC converter controlled by the selective harmonic elimination pulse width modulation technique (SHEPWM) is based on storing the offline calculated switching angle values in a form of lookup table.
Darwish, M, Hashem, GM
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Surface Tension Measurement of Ti‐6Al‐4V by Falling Droplet Method in Oxygen‐Free Atmosphere
Advanced Engineering Materials, EarlyView.In this article, the temperature‐dependent surface tension of free falling, oscillating Ti‐6Al‐4V droplets is investigated in both argon and monosilane doped, oxygen‐free atmosphere. Droplet temperature and oscillation are captured with one single high‐speed camera, and the surface tension is calculated with Rayleigh's formula.
Johannes May +9 more
wiley +1 more source
Comparative Study of Modulation Techniques for Two-Level Voltage Source Inverters
Renewable Energy and Sustainable Development, 2016 A detailed comparative study of modulation techniques for single and three phase dc-ac inverters is presented. Sinusoidal Pulse Width Modulation, Triplen Sinusoidal Pulse Width Modulation, Space Vector Modulation, Selective Harmonic Elimination and ...
Barry W. Williams +3 more
doaj +1 more source
Laser beam modulation by an acousto optic mode locker [PDF]
, 2006 Nazariahmatdaud2006the characterization of beam modulation by acousto-optic mode locker is reported. Hene laser was employed as a source. Acousto-optic mode locker (aoml) was used to convert the continuous beam to become pulsed.
Bidin, Noriah +3 more
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Advanced Engineering Materials, EarlyView.Viktoriia Shtefan, Thorgund Nemec, Ute Hempel, Annett Gebert and coworkers demonstrate that anodic treatment of Ti–Cu‐based metallic glass in a nontoxic pyrophosphate electrolyte forms a protective bilayered Ti/Zr‐oxide film enriched with Cu nanocrystals.
Viktoriia Shtefan +8 more
wiley +1 more source
Collaborative Synchronization Digital Control for Double Hydraulic Cylinders
Advances in Mechanical Engineering, 2014 By researching the synchronization motion of double hydraulic cylinders controlled by high-speed on-off valve, the paper aims to solve the shortage of current hydraulic synchronization system with low synchronization precision. The flow characteristic of
Zhi-hao Liu +5 more
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Multiphase space vector pulse width modulation
IEEE Transactions on Energy Conversion, 2002 Pole-phase modulation adjusts the pole-phase ratio of an induction machine and requires a multileg, multiphase inverter. This paper analyzes an n-leg, n-phase inverter, and presents techniques for n-phase space vector pulse width modulation (SVPWM). In particular, nine-phase SVPWM is developed and implemented on a nine winding induction machine.
J. W. Kelly +2 more
openaire +2 more sources
Power supply circuit for an ion engine sequentially operated power inverters [PDF]
, 2000 A power supply circuit for an ion engine suitable for a spacecraft has a voltage bus having input line and a return line. The power supply circuit includes a pulse width modulation circuit.
Cardwell, Jr., Gilbert I.
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