The Comparison of the Pulse and Constant
... Described above controlling facility of observed luminance causes that PWM method has become very popular for several years. We can find on market many devices: specialized integrated circuits [3, 4, 5] or whole PWM controllers. There are also proposals of application PWM technique in FPGA structure ...
... Described above controlling facility of observed luminance causes that PWM method has become very popular for several years. We can find on market many devices: specialized integrated circuits [3, 4, 5] or whole PWM controllers. There are also proposals of application PWM technique in FPGA structure ...
Wigton Wind Farm Ltd.
... in the order 2.5 to 3.5% which is acceptable. Ratings of the Capacitors and tuning reactors -The ratings of the capcitor and tuning reactor components need to be such that the equipment will withstand the max.level of harmonic currents as well as fundamental voltage magnitude without overloading.Mea ...
... in the order 2.5 to 3.5% which is acceptable. Ratings of the Capacitors and tuning reactors -The ratings of the capcitor and tuning reactor components need to be such that the equipment will withstand the max.level of harmonic currents as well as fundamental voltage magnitude without overloading.Mea ...
Design and Evaluation of a Modular Resonant Switched
... smaller capacitors may not have a low enough ESR as would be required to achieve the power loss goal and that operating at high frequency may induce resonant, rather than exponential, currents due to parasitic leakage inductances. Resonant currents that are synchronized to the switching frequency ar ...
... smaller capacitors may not have a low enough ESR as would be required to achieve the power loss goal and that operating at high frequency may induce resonant, rather than exponential, currents due to parasitic leakage inductances. Resonant currents that are synchronized to the switching frequency ar ...
Life Prediction of Mold Transformer for Urban Rail
... implemented. Power equipment, including mold transformer partial discharge measurements for the diagnosis, monitoring signals in addition to the partial discharge signal with unwanted external noise and noise signal detected and to remove these unnecessary signals to accurately monitor the partial d ...
... implemented. Power equipment, including mold transformer partial discharge measurements for the diagnosis, monitoring signals in addition to the partial discharge signal with unwanted external noise and noise signal detected and to remove these unnecessary signals to accurately monitor the partial d ...
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.