Electro-Optic Modulators
... A bulk electro-optic amplitude modulator consists of a voltage-tunable wave plate followed by a polarizer. †Thus, the modulation of the intensity is a Sin² function. If the input polarization is oriented at 45° to the crystal axes, the applied voltage will produce a variable phase delay between the ...
... A bulk electro-optic amplitude modulator consists of a voltage-tunable wave plate followed by a polarizer. †Thus, the modulation of the intensity is a Sin² function. If the input polarization is oriented at 45° to the crystal axes, the applied voltage will produce a variable phase delay between the ...
The Electric Motor
... The power supply for your work will provide up to 30 V of emf and 1 A of current. It is shown in Figure 1. The power supply functions very nearly as an ideal voltage source up to the current limit set by the “Output Current” knob. The two meters simultaneously read output voltage and current. Operat ...
... The power supply for your work will provide up to 30 V of emf and 1 A of current. It is shown in Figure 1. The power supply functions very nearly as an ideal voltage source up to the current limit set by the “Output Current” knob. The two meters simultaneously read output voltage and current. Operat ...
Optimum Design of Magnetic Inductive Energy Harvester and its AC-DC Converter
... for low voltage, low power, electronic devices is typically 1.8~3.3VDC. Thus, rectification losses cannot be avoided in power processing circuit of magnetic harvester. Recently, a number of high step up converters topologies have been presented, especially for piezoelectics applications [3]-[4], [7] ...
... for low voltage, low power, electronic devices is typically 1.8~3.3VDC. Thus, rectification losses cannot be avoided in power processing circuit of magnetic harvester. Recently, a number of high step up converters topologies have been presented, especially for piezoelectics applications [3]-[4], [7] ...
10 kW Contactless Power Transfer System for Rapid Charger of
... winding 10 kW transformer based on a 1.5 kW H-shaped core transformer was developed for a rapid charger. Even though the transformer capacity was increased, the dimensions of the 10 kW transformer were almost the same as those of the 1.5 kW transformer. In this paper, the design concept for this 10 ...
... winding 10 kW transformer based on a 1.5 kW H-shaped core transformer was developed for a rapid charger. Even though the transformer capacity was increased, the dimensions of the 10 kW transformer were almost the same as those of the 1.5 kW transformer. In this paper, the design concept for this 10 ...
The Retinal Implant Project—J.L. Wyatt Jr.
... The design and some construction and testing steps for other components of the retinal prosthesis have been carried out in-house: these include fabrication of the microelectrode array, fabrication of an initial version of the flexible substrate, development of a working electronic stimulation contro ...
... The design and some construction and testing steps for other components of the retinal prosthesis have been carried out in-house: these include fabrication of the microelectrode array, fabrication of an initial version of the flexible substrate, development of a working electronic stimulation contro ...
DC Motor, How It Works
... different. Consider the two-pole machine shown in Fig. 4-9(a). If the armature does not carry any current (that is, if the machine is on noload), the airgap field takes the form shown in Fig. 4-9(b). The geometric neutral plane and the magnetic neutral plane (GNP and MNP, respectively) are coinciden ...
... different. Consider the two-pole machine shown in Fig. 4-9(a). If the armature does not carry any current (that is, if the machine is on noload), the airgap field takes the form shown in Fig. 4-9(b). The geometric neutral plane and the magnetic neutral plane (GNP and MNP, respectively) are coinciden ...
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.