AC Motors - apolloteched / FrontPage
... commutators, and field coils • These motors can use ac or dc voltages. • High torque and varying motor speed are two properties of the universal motor – Inductive reactance affects current flow in the coils – The resistance of the coil to ac current flow requires greater ac voltages to develop motor ...
... commutators, and field coils • These motors can use ac or dc voltages. • High torque and varying motor speed are two properties of the universal motor – Inductive reactance affects current flow in the coils – The resistance of the coil to ac current flow requires greater ac voltages to develop motor ...
abstract - Innovetech
... This paper proposes a novel high-conversion ratio high-efficiency isolated bidirectional dc–dc converter. The proposed converter is operated in the step-down stage. The dc-blocking capacitor in the high-voltage side is used to reduce the voltage on the transformer, and the current doubler circuits a ...
... This paper proposes a novel high-conversion ratio high-efficiency isolated bidirectional dc–dc converter. The proposed converter is operated in the step-down stage. The dc-blocking capacitor in the high-voltage side is used to reduce the voltage on the transformer, and the current doubler circuits a ...
EM-I QB - K.Sivakumar
... 7. A metal rod wound with 3500 turns is 25 cm long and 2.5cm in diameter. It is bent in to a closed ring and when a current of 0.6A is passed through it, the flux density in it is 0.45Wb/m2.Assuming that all flux links with every turn of the coil, calculate relative permeability of the metal, self i ...
... 7. A metal rod wound with 3500 turns is 25 cm long and 2.5cm in diameter. It is bent in to a closed ring and when a current of 0.6A is passed through it, the flux density in it is 0.45Wb/m2.Assuming that all flux links with every turn of the coil, calculate relative permeability of the metal, self i ...
CSCI 2980: Introduction to Circuits, CAD, and Instrumentation
... A capacitor is a circuit element that consists of two conducting surfaces separated by non-conducting, or dielectric, material. Capacitors are categorized by the type of dielectric material used between the conducting plates. Each type is more suitable for particular applications. Unit of capacitanc ...
... A capacitor is a circuit element that consists of two conducting surfaces separated by non-conducting, or dielectric, material. Capacitors are categorized by the type of dielectric material used between the conducting plates. Each type is more suitable for particular applications. Unit of capacitanc ...
Document
... together both leakage reactances, we find resonant frequency is inversely proportional to the sqrt of sum of leakage reactances. Rotor resistance has a big impact on damping (but not on resonant frequency). Magnetizing reactance shows very little contribution (probably current through large magnetiz ...
... together both leakage reactances, we find resonant frequency is inversely proportional to the sqrt of sum of leakage reactances. Rotor resistance has a big impact on damping (but not on resonant frequency). Magnetizing reactance shows very little contribution (probably current through large magnetiz ...
ELECTRIC CIRCUITS I
... The capacitances CP and CS and the lumped capacitances of the primary and secondary circuits, respectively, and Cw represent the equivalent lumped capacitance between the windings of the ...
... The capacitances CP and CS and the lumped capacitances of the primary and secondary circuits, respectively, and Cw represent the equivalent lumped capacitance between the windings of the ...
Chapter 20-21
... current to the rotor is connected through continuous slip rings. Sometimes the rotor is made to turn by a belt from the engine. The current in the wire coil of the rotor produces a magnetic field inside it on its axis that points horizontally from left to right, thus making north and south poles of ...
... current to the rotor is connected through continuous slip rings. Sometimes the rotor is made to turn by a belt from the engine. The current in the wire coil of the rotor produces a magnetic field inside it on its axis that points horizontally from left to right, thus making north and south poles of ...
A Compact Nested High Voltage Generator
... primary drive resonance cycles up to full voltage. A full wave rectifier scheme was utilized to convert the resonant AC drive to a DC output voltage. The rectifier board was designed such that it could be changed easily to a bipolar series multiplier for future systems. Multiplier spacing is at 30 k ...
... primary drive resonance cycles up to full voltage. A full wave rectifier scheme was utilized to convert the resonant AC drive to a DC output voltage. The rectifier board was designed such that it could be changed easily to a bipolar series multiplier for future systems. Multiplier spacing is at 30 k ...
Instructor : Dr - eem.anadolu.edu.tr
... shunt branch can be omitted. Thus, the power input can be taken to represent the winding copper loss. ...
... shunt branch can be omitted. Thus, the power input can be taken to represent the winding copper loss. ...
Stresa, Italy, 26-28 April 2006
... [8]. In this case relatively large voltages were obtained from the transducer (up to 100 V), so that full-wave diode rectification was practical, followed by a conventional DC-DC step-down convertor. The use of duty cycle to vary the damping factor on the transducer was demonstrated. Roundy et al. [ ...
... [8]. In this case relatively large voltages were obtained from the transducer (up to 100 V), so that full-wave diode rectification was practical, followed by a conventional DC-DC step-down convertor. The use of duty cycle to vary the damping factor on the transducer was demonstrated. Roundy et al. [ ...
www.aryansexport.com
... to about 2.7 volts, and off if the voltage drops below some 2.2 volts. The diodes and the first BC559 also limit the voltage supplied to the robot to about 4 V. The LED lits up when the limiter is active. If the voltage (in direct sunlight) still rises nothing will be damaged, but the clock stops. T ...
... to about 2.7 volts, and off if the voltage drops below some 2.2 volts. The diodes and the first BC559 also limit the voltage supplied to the robot to about 4 V. The LED lits up when the limiter is active. If the voltage (in direct sunlight) still rises nothing will be damaged, but the clock stops. T ...
Zilano Lost Deleted Posts
... there r two spark gaps. one at primary and one before output trafo. the first earth is a direct earth the 2nd earth is in series with 220 volt varistor. we lower volt after 2nd spark gap b4 trafo. spark gaps r open and hot and r made with steel needles pushed in a glass tube with 1 mm gap. primary c ...
... there r two spark gaps. one at primary and one before output trafo. the first earth is a direct earth the 2nd earth is in series with 220 volt varistor. we lower volt after 2nd spark gap b4 trafo. spark gaps r open and hot and r made with steel needles pushed in a glass tube with 1 mm gap. primary c ...
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.