Grounding Transformer
... downside. The Grounding Transformers neutral point has low impedance and is suitable for different grounding systems such as solid earthing, NER earthing (resistor) and resonance earthing (Arc Suppression Coil). The Grounding Transformer can also be equipped with a low voltage auxiliary winding to b ...
... downside. The Grounding Transformers neutral point has low impedance and is suitable for different grounding systems such as solid earthing, NER earthing (resistor) and resonance earthing (Arc Suppression Coil). The Grounding Transformer can also be equipped with a low voltage auxiliary winding to b ...
Voltage Harmonics Measuring Issues in Medium Voltage
... measurements in which voltage transformers are commonly used. The transfer ratio of a voltage transformer fed by distorted primary voltage with harmonic components of frequency higher than fundamental can be different for high frequency components in comparison with the fundamental frequency. During ...
... measurements in which voltage transformers are commonly used. The transfer ratio of a voltage transformer fed by distorted primary voltage with harmonic components of frequency higher than fundamental can be different for high frequency components in comparison with the fundamental frequency. During ...
Illumination Utilization of Electrical Energ 6TH SEMESTER
... Method to minimise errors in PT It is seen from the ratio error that the difference between actual ratio and turn ratio is due to the secondary current I2 and the no load components Iw and Im. To minimise these errors the following methods should be adopted : 1. In order to minimise the errors the ...
... Method to minimise errors in PT It is seen from the ratio error that the difference between actual ratio and turn ratio is due to the secondary current I2 and the no load components Iw and Im. To minimise these errors the following methods should be adopted : 1. In order to minimise the errors the ...
23_LectureOutline
... inductor; this energy is stored in the inductor’s magnetic field. Considering the emf needed to establish a particular current, and the power involved, we find: ...
... inductor; this energy is stored in the inductor’s magnetic field. Considering the emf needed to establish a particular current, and the power involved, we find: ...
Design of High Voltage Low Power Supply Device
... from pin 3 is connected to the Hout inside the TV circuit board. Hout is actually the pin inside the circuit board that gives signal to the transistor Q1. Instead of using the TV signal, the signal from the 555 timer will be transmitted to the transistor Q1 by connecting them together. Q1 will send ...
... from pin 3 is connected to the Hout inside the TV circuit board. Hout is actually the pin inside the circuit board that gives signal to the transistor Q1. Instead of using the TV signal, the signal from the 555 timer will be transmitted to the transistor Q1 by connecting them together. Q1 will send ...
fedak-kostelny-kanuch - Computer Networks Laboratory
... complex graphical waveforms can be represented, but just for one or small number of cases. Based on its principle, the phasor theory was applied that supposes harmonic supply of the AC electrical machines. Here an interactive principle is introduced from the physical substance there is derived a con ...
... complex graphical waveforms can be represented, but just for one or small number of cases. Based on its principle, the phasor theory was applied that supposes harmonic supply of the AC electrical machines. Here an interactive principle is introduced from the physical substance there is derived a con ...
International Journal of Electrical, Electronics and
... inductor or a transformer, typically in the range from 300 k Hz to 10 M Hz. Although the transformers can isolate the input from the output, they result in transformer losses (hysteresis and eddy current losses) and add to the increase in size. This is where the role of an inductor comes in. Inducto ...
... inductor or a transformer, typically in the range from 300 k Hz to 10 M Hz. Although the transformers can isolate the input from the output, they result in transformer losses (hysteresis and eddy current losses) and add to the increase in size. This is where the role of an inductor comes in. Inducto ...
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.