Speaker Analysis Using Thiele
... There are many interesting observations that can be drawn from looking at these two graphs. One of the biggest things that you can see is that the resonant frequency is actually shifted down when the speaker is in the cabinet as opposed to in free air. In the graphs, above, the F(s) of the speaker ...
... There are many interesting observations that can be drawn from looking at these two graphs. One of the biggest things that you can see is that the resonant frequency is actually shifted down when the speaker is in the cabinet as opposed to in free air. In the graphs, above, the F(s) of the speaker ...
Transmission Line Protection System for Increasing Power System
... Series capacitors applied on transmission systems improve system stability and increase power transfer capability. The application of a series capacitor reduces the inductive reactance of the given transmission line, making the line appear electrically shorter. Although series capacitors may improve ...
... Series capacitors applied on transmission systems improve system stability and increase power transfer capability. The application of a series capacitor reduces the inductive reactance of the given transmission line, making the line appear electrically shorter. Although series capacitors may improve ...
Pyroelectric Energy Conversion: Optimization Principles
... considered technique. From the efficiency point of view it has been shown that SSH techniques may be implemented with electronic circuits consuming less than 5% of the en ergy produced by the piezoelectric element. This novel ap proach is very promising for improving the effectiveness and power densi ...
... considered technique. From the efficiency point of view it has been shown that SSH techniques may be implemented with electronic circuits consuming less than 5% of the en ergy produced by the piezoelectric element. This novel ap proach is very promising for improving the effectiveness and power densi ...
Brake Service and Maintenance
... 1. Tighten the three adjustment nuts equally to establish zero air gap. 2. Loosen the adjustment nuts according to the figures below. Degree of ...
... 1. Tighten the three adjustment nuts equally to establish zero air gap. 2. Loosen the adjustment nuts according to the figures below. Degree of ...
NFC Reader Design: Antenna design
... The vast majority of RFID systems operate according to the principle of inductive coupling. ...
... The vast majority of RFID systems operate according to the principle of inductive coupling. ...
Transformer Disassembly and Inductor Winding
... Once a scrap power supply has been located, the required parts can be removed. Start with the switching transformer. It is usually the largest transformer in the supply, and is covered with yellow tape. The transformer will probably be covered with electrical varnish, which will need to be removed. ...
... Once a scrap power supply has been located, the required parts can be removed. Start with the switching transformer. It is usually the largest transformer in the supply, and is covered with yellow tape. The transformer will probably be covered with electrical varnish, which will need to be removed. ...
Chapter 14 Feedback and Oscillator Circuits
... i calculations l l ti with ith feedback f db k are often ft based b d on external t l resistive elements in the circuit. By removing gain calculations from internal variations of β and gm, the gain becomes more stable. stable ...
... i calculations l l ti with ith feedback f db k are often ft based b d on external t l resistive elements in the circuit. By removing gain calculations from internal variations of β and gm, the gain becomes more stable. stable ...
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.