In magnetic circuits, the core is often made of laminated magnetic material. What are the benefits of using a laminated magnetic core? Select ALL that apply:
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- Define electronegative gases and Compare between SF6 and 02 Insulator? Explain the different schemes for cascade connection of transformers for producing very high ac voltages?For operation at 60 Hz and a given peak flux density, the core loss of a given core is 1W due to hysteresis and 0.5W due to eddy currents. Estimate the core loss for 400-Hz operation with the same peak flux density.An AC source provides peak output Vi and peak current ii when connected to the coil primary of a transformer. The transformer has Np turns in the primary coil and Ns turns in the secondary coil. A resistance circuit R is connected to the transformer, see figure below. What is the equivalent resistance of the circuit?
- Draw the full-wave voltage doubler circuit diagram. When a 1:4 transformer is used in this circuit andIf Vo=12sin(314t) alternative signal is obtained at the output, the frequency of the input signal, maximum and rmsCalculate its value.UDng a ITIe Core in high frequency transformers. c- Discuss, different applications of iron cores of different hysteresis loops. d- Explain the effect of Inrush current on power transformers.-4 poles-26 conductors-double layer-simplex wave winding Can you do this in "armature winding"? Thank you.
- Q.4/ choose true or false: 1. The reluctance of any core is proportional directly with the length of it and inversely with both the permeability and the cross-section area of it. 2. The number of parallel paths in wave windings is equal to twice of the number of poles. 3. In dc machines with same values of Z, N, Ø, the emf for wave winding type is more than emf of lab winding type. 4. If we insert a current in such a conductor subjected to a constant magnetic field, a movement will achieved giving the principle of electric generator.2. The below figure shows the results of magnetic particles inspection experiment. What can you conclude from it? d) Discuss which hysteresis is better to be used with the AC generator in the airplane. e) In general, describe the structural, elasticity and electrical properties of copper and the PVC insulator (polymeric) with reference to their material properties. f) How metals and non-metals (ceramics and polymers) could be degraded?Given a center tapped transformer, plot the output wave form. (Assuming practical model)
- Verify the following property of the twiddle factor:If the core of LVDT is at the middle, then the output voltage will be a. maximum b. minimum c. Output voltage is no relation with core position d. 0Which of the ff given below is the eddy current loss not proportional to? Square of the frequency Square of the flux density Square of the load current of the laminated core Square of the thickness