Calculation and Analysis of Transformer Inrush Current Based on
... current in transformer may be caused by energizing an unloaded transformer, occurrence of an external fault, voltage recovery after clearing an external fault and out-ofphase synchronizing of connected generator [1-2]. Because the amplitude of inrush current can be as high as a shortcircuit current, ...
... current in transformer may be caused by energizing an unloaded transformer, occurrence of an external fault, voltage recovery after clearing an external fault and out-ofphase synchronizing of connected generator [1-2]. Because the amplitude of inrush current can be as high as a shortcircuit current, ...
LITERATURE REVIEW CHAPTER 2
... Chapter 1 dealt with the introduction to the research performed in this thesis. In this chapter, a literature review is presented to place this into context of available knowledge. A few key concepts seminal to this study are identified and presented. Firstly, basic concepts of power amplification a ...
... Chapter 1 dealt with the introduction to the research performed in this thesis. In this chapter, a literature review is presented to place this into context of available knowledge. A few key concepts seminal to this study are identified and presented. Firstly, basic concepts of power amplification a ...
MN201003EN/ Old S201-10-1
... glasses) supplied by your employer or required for safety on the job. Follow manufacturer's instructions when installing or using any apparatus or attachments. Observe all precautions recommended in manufacturer's literature. Handle all electrical equipment with respect. Make sure you know circuit a ...
... glasses) supplied by your employer or required for safety on the job. Follow manufacturer's instructions when installing or using any apparatus or attachments. Observe all precautions recommended in manufacturer's literature. Handle all electrical equipment with respect. Make sure you know circuit a ...
INSTRUMENT TRANSFORMER DIMENSIONING FOR SUBSTATIONS Ronny Mustajärvi
... One important factor that determines the saturation point is the accuracy limit factor or ALF. ALF times the rated primary current is the saturation point where the iron core begins to saturate as seen in Figure 2. The physical size of the iron core greatly depends on the accuracy limit factor. The ...
... One important factor that determines the saturation point is the accuracy limit factor or ALF. ALF times the rated primary current is the saturation point where the iron core begins to saturate as seen in Figure 2. The physical size of the iron core greatly depends on the accuracy limit factor. The ...
Design and Analysis of a New Dual-Stator Permanent
... ferrite segments and the stator surface increases the magnetic resistance and makes it difficult to fix the stationary segments. If there is no airgap, its related magnetic resistance can be eliminated. However, a large leakage flux may appear. In this paper, a novel design, with less flux leakage a ...
... ferrite segments and the stator surface increases the magnetic resistance and makes it difficult to fix the stationary segments. If there is no airgap, its related magnetic resistance can be eliminated. However, a large leakage flux may appear. In this paper, a novel design, with less flux leakage a ...
Resonant inductive coupling
Resonant inductive coupling or electrodynamic induction is the near field wireless transmission of electrical energy between two magnetically coupled coils that are part of resonant circuits tuned to resonate at the same frequency. This process occurs in a resonant transformer, an electrical component which consists of two high Q coils wound on the same core with capacitors connected across the windings to make two coupled LC circuits. Resonant transformers are widely used in radio circuits as bandpass filters, and in switching power supplies. Resonant inductive coupling is also being used in wireless power systems. Here the two LC circuits are in different devices; a transmitter coil in one device transmits electric power across an intervening space to a resonant receiver coil in another device. This technology is being developed for powering and charging portable devices such as cellphones and tablet computers at a distance, without being tethered to an outlet.Resonant transfer works by making a coil ring with an oscillating current. This generates an oscillating magnetic field. Because the coil is highly resonant, any energy placed in the coil dies away relatively slowly over very many cycles; but if a second coil is brought near it, the coil can pick up most of the energy before it is lost, even if it is some distance away. The fields used are predominately non-radiative, near fields (sometimes called evanescent waves), as all hardware is kept well within the 1/4 wavelength distance they radiate little energy from the transmitter to infinity.One of the applications of the resonant transformer is for the CCFL inverter. Another application of the resonant transformer is to couple between stages of a superheterodyne receiver, where the selectivity of the receiver is provided by tuned transformers in the intermediate-frequency amplifiers. The Tesla coil is a resonant transformer circuit used to generate very high voltages, and is able to provide much higher current than high voltage electrostatic machines such as the Van de Graaff generator. Resonant energy transfer is the operating principle behind proposed short range (up to 2 metre) wireless electricity systems such as WiTricity or Rezence and systems that have already been deployed, such as Qi power transfer, passive RFID tags and contactless smart cards.