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Showing 1 to 10 of 10 for “"VFD"”.
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Application of the Vortex Fluid Device (VFD) in Polysulfone Synthesis and Ultra-filtration Membrane Fabrication for water treatment purposes
… membrane fabrication. The Vortex Fluid Device (VFD) is a newly invented platform which has found many applications in materials science and clean technology. The unique features of the VFD originate from a combination of different effects (e.g., micro-mixing, viscous drag, microfluidic flow, …
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Modeling of industrial power distribution circuits for voltage sag and fault analysis
… develops a 24-pulse variable frequency drive (VFD) model in EMTP. The functionality of the VFD model is evaluated by using a test feeder, with a focus on its control mechanisms. The VFD is controlled with the field-oriented control (FOC) method and tuning procedures are thoroughly discussed. …
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Impact of System Impedance on Harmonics Produced by Variable Frequency Drives (VFDs)
Variable Frequency Drives (VFDs) are utilized in commercial and industrial facilities to improve motor efficiency and provide process flexibility. VFDs are nonlinear loads that inject harmonic currents into the power system, and result in harmonic voltages across the system impedance. This harmonic …
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Rotating Thin Films: the Vortex Fluidic Device
… in the performance of the Vortex Fluidic Device (VFD), developed by the Raston laboratory at Flinders University, Australia. The VFD is a novel technology in the synthesis of organic chemicals and in material processing, and is considered a green technology device, achieving enhanced chemical …
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A Method for Evaluating the Application of Variable Frequency Drives with Coal Mine Ventilation Fans
… The use of variable frequency drives (VFDs), which control fan speed, provides a solution to this problem. VFDs are already used in various similar applications such as pumping and building ventilation. New technology now enables efficient VFD operation in medium voltage (2,300 – 6,900 …
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Effetti dell'integrazione visuo-acustica in pazienti con disturbo di campo visivo
… on patients with Visual Field Defect (VFD). Experiment 1 investigated whether the integration of stimuli from different modalities (cross-modal) and from the same modality (within-modal) have a different, immediate effect on localization behaviour. Patients had to localize …
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Modeling brake specific fuel consumption to support exploration of doubly fed electric machines in naval engineering applications
… the demanded power. Variable frequency drive (VFD) concepts offer relief of this constraint but at a cost in the form of increased power conversion and control support system footprints. The ever increasing and complex demands for electrical power increases the motivation and interest in …
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Design and Comparison of Induction Motor and Synchronous Reluctance Motor for Variable Speed Applications: Design Aided by Differential Evolution and Finite Element Analysis
… through the same Variable Frequency Driver (VFD), the Induction Motor was able to bear a higher overload, whereas the Synchronous Reluctance Motor compared favorably and showed lower power consumption in average under intermittent loads. It has been proved the feasibility of using …
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Harmonic Analysis of a Static VAR Compensated Mixed Load System
… based load is the Variable Frequency Drive (VFDs) used to vary the speed of an induction motor; whereas a common example of a power electronic based controller used in power systems is the Static VAR Compensator (SVC) for improving a system’s power factor. In this thesis, the harmonic content …
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Developing a system to measure rheology of conditioned soil for soft-ground TBM tunneling
… testing machine, a Variable Frequency Drive (VFD) was incorporated to allow for control of the rotational speed of the propeller. The pitched propeller was used as a preliminary configuration for assessment of the shear resistance vs. shear rate relationship for various mediums. Several steps …