Piezoelectricity
... applied force. Subsequently, the converse of this relationship was confirmed: if one of these voltage-generating crystals was exposed to an electric field it lengthened or shortened according to the polarity of the field, and in proportion to the strength of the field. These behaviors were labeled t ...
... applied force. Subsequently, the converse of this relationship was confirmed: if one of these voltage-generating crystals was exposed to an electric field it lengthened or shortened according to the polarity of the field, and in proportion to the strength of the field. These behaviors were labeled t ...
LTC3107 - Ultra-Low Voltage Energy Harvester and Primary Battery
... regulated to a voltage 230mV below the battery voltage. The VLDO output will be fixed at 2.2V unless VBAT is below 2.2V, in which case it will track VBAT. When no harvested energy is available, the LTC3107 average quiescent current draw from the battery is typically 6µA. If there is sufficient harve ...
... regulated to a voltage 230mV below the battery voltage. The VLDO output will be fixed at 2.2V unless VBAT is below 2.2V, in which case it will track VBAT. When no harvested energy is available, the LTC3107 average quiescent current draw from the battery is typically 6µA. If there is sufficient harve ...
DYNATECH D-BOX
... control system considers that a UCM has occurred. The safety line opens. The coil is deactivated, the governor is locked and the safety gears are interlocked. Case 9: Car uncontrolled movement (UCM) in installation with door pre-opening or re-levelling. The car is stopped at floor level with the doo ...
... control system considers that a UCM has occurred. The safety line opens. The coil is deactivated, the governor is locked and the safety gears are interlocked. Case 9: Car uncontrolled movement (UCM) in installation with door pre-opening or re-levelling. The car is stopped at floor level with the doo ...
Square-wave excitation of a linear oscillator
... large quality factor provides us with a means by which a complex periodic input can be physically decomposed into its Fourier components. The mathematical representation of the square-wave function in the right-hand side of Eq. (3) is not unique. The function can be represented as a sum of other fun ...
... large quality factor provides us with a means by which a complex periodic input can be physically decomposed into its Fourier components. The mathematical representation of the square-wave function in the right-hand side of Eq. (3) is not unique. The function can be represented as a sum of other fun ...
BDTIC CoolMOS™ Primary Side MOSFET Selection for LLC Topology
... Equation (3) as defined appears to formulate the condition for ZVS from the perspective of resonant energy. However, the fact is that equation (3) is derived from the voltage equation of node A and more importantly, the charging/discharging time for the output capacitance of the power MOSFET in the ...
... Equation (3) as defined appears to formulate the condition for ZVS from the perspective of resonant energy. However, the fact is that equation (3) is derived from the voltage equation of node A and more importantly, the charging/discharging time for the output capacitance of the power MOSFET in the ...
A Simple Approach tyo YIG Oscil
... a precaution, you can check the connections for the two tuning coils with an ohmmeter. Zener diodes are frequently fitted as a protection against an over voltage on the pins caused by the operating voltages. Care must be exercised with YIG oscillators from HP, as most have unlabelled connections whi ...
... a precaution, you can check the connections for the two tuning coils with an ohmmeter. Zener diodes are frequently fitted as a protection against an over voltage on the pins caused by the operating voltages. Care must be exercised with YIG oscillators from HP, as most have unlabelled connections whi ...
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.