lecture1424353332
... 3.5.1 Speed of rotating magnetic field The speed at which the rotating magnetic field revolves is called the synchronous speed (Ns). Referring to Fig. 3.6 (ii), the time instant 4 represents the completion of one-quarter cycle of alternating current Ix from the time instant 1. During this one quarte ...
... 3.5.1 Speed of rotating magnetic field The speed at which the rotating magnetic field revolves is called the synchronous speed (Ns). Referring to Fig. 3.6 (ii), the time instant 4 represents the completion of one-quarter cycle of alternating current Ix from the time instant 1. During this one quarte ...
Cutler-Hammer Instructions for 36" Wide Vacuum-Break
... really two coils in series, with a connection to their common point. Both coils are encapsulated in one environmentally-immune coil shell, which also contains a full-wave silicon diode rectifier. An AC or DC source can be connected to terminals A and B on the coil shell. When an AC source is applied ...
... really two coils in series, with a connection to their common point. Both coils are encapsulated in one environmentally-immune coil shell, which also contains a full-wave silicon diode rectifier. An AC or DC source can be connected to terminals A and B on the coil shell. When an AC source is applied ...
Ten-Tec 1254 Manual
... Convenient default or "empty" memory: 15 MHz (WWV) Synthesized 45-75 MHz local oscillator 45 MHz first IF 455 kHz second IF 4 kHz filter bandwidth combines good AM audio response with excellent SSB-CW selectivity Semiconductors: 10 IC 's, 26 transistors, 16 diodes Antenna connector can ...
... Convenient default or "empty" memory: 15 MHz (WWV) Synthesized 45-75 MHz local oscillator 45 MHz first IF 455 kHz second IF 4 kHz filter bandwidth combines good AM audio response with excellent SSB-CW selectivity Semiconductors: 10 IC 's, 26 transistors, 16 diodes Antenna connector can ...
INTERNATIONAL STANDARD IEC 60044-2
... This part of IEC 60044 applies to new inductive voltage transformers for use with electrical measuring instruments and electrical protective devices at frequencies from 15 Hz to 100 Hz. Although this standard relates basically to transformers with separate windings, it is also applicable, where appr ...
... This part of IEC 60044 applies to new inductive voltage transformers for use with electrical measuring instruments and electrical protective devices at frequencies from 15 Hz to 100 Hz. Although this standard relates basically to transformers with separate windings, it is also applicable, where appr ...
Three-dimensional Finite Element Computation of Eddy Currents in
... research project financed by the Swedish National Board for Industrial and Technical Development (NUTEK), ABB Generation AB, ABB Corporate Research and ABB Industrial Products. The financial support is gratefully acknowledged. The project aims at developing numerical methods for solving three-dimens ...
... research project financed by the Swedish National Board for Industrial and Technical Development (NUTEK), ABB Generation AB, ABB Corporate Research and ABB Industrial Products. The financial support is gratefully acknowledged. The project aims at developing numerical methods for solving three-dimens ...
Navy Electricity and Electronics Training Series
... The Navy Electricity and Electronics Training Series (NEETS) was developed for use by personnel in many electrical- and electronic-related Navy ratings. Written by, and with the advice of, senior technicians in these ratings, this series provides beginners with fundamental electrical and electronic ...
... The Navy Electricity and Electronics Training Series (NEETS) was developed for use by personnel in many electrical- and electronic-related Navy ratings. Written by, and with the advice of, senior technicians in these ratings, this series provides beginners with fundamental electrical and electronic ...
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.