Abstract - 1000kv technologies
... frequency alternating current phenomena, electrotherapy, and the transmission of electrical energy without wires. Tesla coil circuits were used commercially in sparkgap radio transmitters for wireless telegraphy until the 1920s,[1][9][10][11][12][13] and in medical equipment such as electrotherapy a ...
... frequency alternating current phenomena, electrotherapy, and the transmission of electrical energy without wires. Tesla coil circuits were used commercially in sparkgap radio transmitters for wireless telegraphy until the 1920s,[1][9][10][11][12][13] and in medical equipment such as electrotherapy a ...
Notes - 8 - Transformers
... (P = IV) • a high voltage means a low current. •since power lost by the wire due to resistance is Ploss = I2R • low current means power loss is at a minimum ...
... (P = IV) • a high voltage means a low current. •since power lost by the wire due to resistance is Ploss = I2R • low current means power loss is at a minimum ...
Generator and Transformer
... Moving Conductor If a straight conductor is moved in a path perpendicular to a magnetic field, a current is induced in the conductor No current flows though since not a loop ...
... Moving Conductor If a straight conductor is moved in a path perpendicular to a magnetic field, a current is induced in the conductor No current flows though since not a loop ...
How Is Sound Produced?
... More efficient use of power due to use of modern semiconductors instead of vacuum tubes. Wider Frequency response Expected from a higher power Efficiency Smaller physical size of system. Less heat radiated by components. ...
... More efficient use of power due to use of modern semiconductors instead of vacuum tubes. Wider Frequency response Expected from a higher power Efficiency Smaller physical size of system. Less heat radiated by components. ...
Worksheet 8.7 - Transformers
... 1) Currents of 0.25 A and 0.95 A flow through the primary and secondary coils of a transformer respectively if there are 1.0x103 turns in the primary coil how many turns are in the secondary coil? 2) A step-down transformer has coils of 1.20 x 103 and 1.5- x 102 turns. If the transformer is connecte ...
... 1) Currents of 0.25 A and 0.95 A flow through the primary and secondary coils of a transformer respectively if there are 1.0x103 turns in the primary coil how many turns are in the secondary coil? 2) A step-down transformer has coils of 1.20 x 103 and 1.5- x 102 turns. If the transformer is connecte ...
Microelectronics… - Oakland University
... water wave motion to create electricity • Electrical energy is conditioned and stored for later use ...
... water wave motion to create electricity • Electrical energy is conditioned and stored for later use ...
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.
