Low Power Very High Frequency Switch-Mode Power
... far into the MHz range, magnetic core losses increases rappidly and becomes unacceptably high for most core materials [2]. At this point air core and PCB embedded inductors becomes a viable solutions, as the inductances needed at these frequencies can be made in a small physical size and the core lo ...
... far into the MHz range, magnetic core losses increases rappidly and becomes unacceptably high for most core materials [2]. At this point air core and PCB embedded inductors becomes a viable solutions, as the inductances needed at these frequencies can be made in a small physical size and the core lo ...
AN 574: Printed Circuit Board (PCB) Power Delivery Network
... at the FEFFECTIVE frequency reported by the tool. As shown in the following example, over-designing the PCB by adding capacitors with a SRF beyond FEFFECTIVE results in additional build of materials (BOM) cost without performance improvements. Two designs (A are B) are studied. All the parameters of ...
... at the FEFFECTIVE frequency reported by the tool. As shown in the following example, over-designing the PCB by adding capacitors with a SRF beyond FEFFECTIVE results in additional build of materials (BOM) cost without performance improvements. Two designs (A are B) are studied. All the parameters of ...
Self -Excited DC Motor
... produces alternating voltage and a dc generator produces direct voltage. They work on the principle of Faraday’s law of electromagnetic induction (shortly referred as EMI). According to this law, when a conductor moves in a magnetic field it cuts magnetic lines force and there is rate of flux linkin ...
... produces alternating voltage and a dc generator produces direct voltage. They work on the principle of Faraday’s law of electromagnetic induction (shortly referred as EMI). According to this law, when a conductor moves in a magnetic field it cuts magnetic lines force and there is rate of flux linkin ...
Project code STCU/5388. Development, realisation and testing of the sample... phase shift transformer with thyristor control. Period of realisation 2011-2012....
... - A choice of the most perspective circuit variant of PST for experimental realization in laboratory conditions, working out of principles of realization of step switching - Working out of a mathematical apparatus for the description of physical processes in the elements forming PST, at symmetric re ...
... - A choice of the most perspective circuit variant of PST for experimental realization in laboratory conditions, working out of principles of realization of step switching - Working out of a mathematical apparatus for the description of physical processes in the elements forming PST, at symmetric re ...
Magnetics Design 2 - Magnetic Core
... advantageous, bear in mind that the inductance may diminish an unacceptable amount at higher current levels due to the rounding effect discussed earlier. Flyback transformers are really inductors with multiple windings. There are some unique problems associated with the windings, but the core does n ...
... advantageous, bear in mind that the inductance may diminish an unacceptable amount at higher current levels due to the rounding effect discussed earlier. Flyback transformers are really inductors with multiple windings. There are some unique problems associated with the windings, but the core does n ...
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.