Ans: b
... a. first from negative terminal to positive terminal and vice versa b. First from positive terminal to negative terminal and vice versa c. From negative terminal to positive terminal only d. From positive terminal to negative terminal only Ans: d 4. If the current passing through a conductor is doub ...
... a. first from negative terminal to positive terminal and vice versa b. First from positive terminal to negative terminal and vice versa c. From negative terminal to positive terminal only d. From positive terminal to negative terminal only Ans: d 4. If the current passing through a conductor is doub ...
AC motor
... machine where it consumes power at a leading power factor when its rotor is over excited. It thus appears to the supply to be a capacitor, and could thus be used to correct the lagging power factor that is usually presented to the electric supply by inductive loads. The excitation is adjusted until ...
... machine where it consumes power at a leading power factor when its rotor is over excited. It thus appears to the supply to be a capacitor, and could thus be used to correct the lagging power factor that is usually presented to the electric supply by inductive loads. The excitation is adjusted until ...
Grounding Shielding
... as a sink for electrical charge. Now it also applies to metallic structures, frames, crates, housings etc. when these individual parts are connected to each other to build up a common potential plane. Space systems also use the term "ground". They are electrically referenced to the vehicle skin, whi ...
... as a sink for electrical charge. Now it also applies to metallic structures, frames, crates, housings etc. when these individual parts are connected to each other to build up a common potential plane. Space systems also use the term "ground". They are electrically referenced to the vehicle skin, whi ...
Energy efficient transformer solutions European Minimum
... transformers specifically designed for deep water (submerged) applications, ...
... transformers specifically designed for deep water (submerged) applications, ...
Application Note Evaluation Board 3kW dual phase LLC
... The combined trends of a continuous reduction of volume and size of the power converters and an increase in required output power represent a serious challenge in modern switch mode power supply (SMPS) designs. When addressing the high power density requirement, even in a SMPS with high peak efficie ...
... The combined trends of a continuous reduction of volume and size of the power converters and an increase in required output power represent a serious challenge in modern switch mode power supply (SMPS) designs. When addressing the high power density requirement, even in a SMPS with high peak efficie ...
A Guide To Describe The Occurrence and Mitigation Of Switching
... characteristic used in Figure 3 of C62.2 for aperiodic wave forms and the volt-time characteristic for sine waves shown in Figure 6 with a slope of 25. The consistency between the two curves is quite good and suggests that the region prior to the BSL point at 300 µsµseconds can be represented as a s ...
... characteristic used in Figure 3 of C62.2 for aperiodic wave forms and the volt-time characteristic for sine waves shown in Figure 6 with a slope of 25. The consistency between the two curves is quite good and suggests that the region prior to the BSL point at 300 µsµseconds can be represented as a s ...
8245 - SK Engineering Academy
... So it is called as rising characteristic machine. 22. What do you mean by saturation of field pole? If we are going on increasing the field current, after certain limit, any more rise in current will not have a rise in flux. This condition is called saturation of field poles. 23. Name the parts of a ...
... So it is called as rising characteristic machine. 22. What do you mean by saturation of field pole? If we are going on increasing the field current, after certain limit, any more rise in current will not have a rise in flux. This condition is called saturation of field poles. 23. Name the parts of a ...
Imrie® Diagnostic Testing
... directions. The illustrations are generally typical and not of any particular model. ...
... directions. The illustrations are generally typical and not of any particular model. ...
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.