ISSCC 2017
... example, there is much interest in wireless power transmission for battery charging applications, ranging from mobile handsets to medical implants: increased performance in wireless power transmission is enabling more efficient power delivery over longer distances. There is also an explosion of tech ...
... example, there is much interest in wireless power transmission for battery charging applications, ranging from mobile handsets to medical implants: increased performance in wireless power transmission is enabling more efficient power delivery over longer distances. There is also an explosion of tech ...
Ballast Survival When Exposed To Commonly Found Transient
... Magnetic style ballasts have been used for many years. They operate the lamp at the same frequency as the incoming power. While they perform the basic functions adequately, high frequency output electronic ballasts offer several advantages over magnetic ballasts: • Electronic ballasts are much more ...
... Magnetic style ballasts have been used for many years. They operate the lamp at the same frequency as the incoming power. While they perform the basic functions adequately, high frequency output electronic ballasts offer several advantages over magnetic ballasts: • Electronic ballasts are much more ...
HMagn4: Coil with ferromagnetic core
... 1. Working cycleWe assume the uniformly distributed temperature before the motor was suddenly loaded. The cooling conditions supposed to be constant during the heating process. We keep track of the temperature distribution until it gets almost steady state. Then we start to solve the second problem ...
... 1. Working cycleWe assume the uniformly distributed temperature before the motor was suddenly loaded. The cooling conditions supposed to be constant during the heating process. We keep track of the temperature distribution until it gets almost steady state. Then we start to solve the second problem ...
Thesis-Reporttt-4
... power transmission, power distribution as well as power generation plants. It also includes transmission cables, distribution system, and substations. The Power Transformer is high cost and essential electrical instrument of a Power Transmission Section. As it is essential elements in electrical pow ...
... power transmission, power distribution as well as power generation plants. It also includes transmission cables, distribution system, and substations. The Power Transformer is high cost and essential electrical instrument of a Power Transmission Section. As it is essential elements in electrical pow ...
RF current element design for independent control of current
... homogeneity (4), has further contributed to the increased interest in parallel transmit coils (5). A parallel transmit coil with independent control of the rung current amplitude and phase may be achieved by ensuring that the rungs are well decoupled from each other. Decoupling between the elements ...
... homogeneity (4), has further contributed to the increased interest in parallel transmit coils (5). A parallel transmit coil with independent control of the rung current amplitude and phase may be achieved by ensuring that the rungs are well decoupled from each other. Decoupling between the elements ...
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.