Manuals Basic Electrical Engineering BE-104
... They spread out the magnetic flux over the armature periphery more uniformly. ...
... They spread out the magnetic flux over the armature periphery more uniformly. ...
Transformer Secondary Tap Conductors
... could occur. However, in this example, given the small transformer size, it would be difficult for the available fault current on the secondary side of the transformer to reach this fault current level. Transformer Tap Conductors – 240.21(C)(6) 240.21(C)(6) permits fuses or circuit breakers on the s ...
... could occur. However, in this example, given the small transformer size, it would be difficult for the available fault current on the secondary side of the transformer to reach this fault current level. Transformer Tap Conductors – 240.21(C)(6) 240.21(C)(6) permits fuses or circuit breakers on the s ...
Battery Chargers - Alpine Power Systems
... A typical switchmode power supply (SMPS) incorporates a front end AC-DC rectifier to generate an unregulated DC input voltage, a high frequency (HF) chopper that chops the input DC voltage, and an output filtering stage to generate a smooth, very low ripple output voltage (see Fig. 5). Pulse Width M ...
... A typical switchmode power supply (SMPS) incorporates a front end AC-DC rectifier to generate an unregulated DC input voltage, a high frequency (HF) chopper that chops the input DC voltage, and an output filtering stage to generate a smooth, very low ripple output voltage (see Fig. 5). Pulse Width M ...
100 KV from a bike - Apparently Apparel
... bike generator gives off alternating current (AC) which can be transformed into High Voltage AC or DC currant, Thru the use of a High Voltage Transformer or a Voltage doubler in this case a voltage multiplier. It's very simple but powerful. The capacitor creates the new amperage and high voltage thr ...
... bike generator gives off alternating current (AC) which can be transformed into High Voltage AC or DC currant, Thru the use of a High Voltage Transformer or a Voltage doubler in this case a voltage multiplier. It's very simple but powerful. The capacitor creates the new amperage and high voltage thr ...
Equivalent Circuit Model
... In this test the rotor is blocked so that the motor cannot rotate, and balanced polyphase voltages are applied to the stator terminal ( increases voltage until stator current reaches its rated value). The blocked-rotor test should be performed under the same conditions of rotor current and frequency ...
... In this test the rotor is blocked so that the motor cannot rotate, and balanced polyphase voltages are applied to the stator terminal ( increases voltage until stator current reaches its rated value). The blocked-rotor test should be performed under the same conditions of rotor current and frequency ...
150LECTURE11CHAPTER11INDUCTORS Lecture Notes Page
... Time constants After 1 T, the inductor’s current is 63.2 % of final value. After 2 T, the inductor’s current is 86.5 % of final value. After 3 T, the inductor’s current is 95.0 % of final value. After 4 T, the inductor’s current is 98.2 % of final value. After 5 T, the inductor’s current is 99.3 % o ...
... Time constants After 1 T, the inductor’s current is 63.2 % of final value. After 2 T, the inductor’s current is 86.5 % of final value. After 3 T, the inductor’s current is 95.0 % of final value. After 4 T, the inductor’s current is 98.2 % of final value. After 5 T, the inductor’s current is 99.3 % o ...
“A 10kW 3 level UPS Inverter utilizing a full SiC module solution to
... The IGBT has been developed roughly 35 years ago and has been improved by each generation since. But there has been not a lot of innovation at discrete packages as the IGBT is limited by switching frequency and thus there has been no push from the market for further package development. One can choo ...
... The IGBT has been developed roughly 35 years ago and has been improved by each generation since. But there has been not a lot of innovation at discrete packages as the IGBT is limited by switching frequency and thus there has been no push from the market for further package development. One can choo ...
EMI in the Workplace Environment
... Medical devices have become very sophisticated since the introduction of the first implantable pacemaker in the late 1950’s. Similarly, technology of items found in the home and workplace environments have become very sophisticated to the point where interaction between some products and implanted d ...
... Medical devices have become very sophisticated since the introduction of the first implantable pacemaker in the late 1950’s. Similarly, technology of items found in the home and workplace environments have become very sophisticated to the point where interaction between some products and implanted d ...
QUESTION 1
... Determine the total current taken from the supply and the overall power factor. [6 marks] ...
... Determine the total current taken from the supply and the overall power factor. [6 marks] ...
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.