IMPLEMENTATION OF SINGLE STAGE FULL BRIDGE SERIES
... generation of the desired output voltage is achieved comparing the desired reference waveform (modulating signal) with a high-frequency triangular’ carrier’ wave as depicted schematically in Fig 1.2. Depending on whether the signal voltage is larger or smaller than the carrier waveform, either the p ...
... generation of the desired output voltage is achieved comparing the desired reference waveform (modulating signal) with a high-frequency triangular’ carrier’ wave as depicted schematically in Fig 1.2. Depending on whether the signal voltage is larger or smaller than the carrier waveform, either the p ...
Poloidal Field Power Supply Systems for the HT
... lower superconducting coils arranged around the plasma in the HT-7U tokamak. The configuration is shown in Fig. 3. During the first few years, HT-7U will operate in doublenull mode, the PF power supply system is designed ...
... lower superconducting coils arranged around the plasma in the HT-7U tokamak. The configuration is shown in Fig. 3. During the first few years, HT-7U will operate in doublenull mode, the PF power supply system is designed ...
Capacitive Storage
... where we is the density of the electrostatic energy and V is the active volume in which the energy is stored. The new relationship shows how the density of the stored energy can be increased. There are only two possibilities. First increasing E which may be very efficient as it acts with its square. ...
... where we is the density of the electrostatic energy and V is the active volume in which the energy is stored. The new relationship shows how the density of the stored energy can be increased. There are only two possibilities. First increasing E which may be very efficient as it acts with its square. ...
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.