Estimate the width of the stator teeth and back of core such that the flux density in those parts doesn't exceed 1.65 T when the peak airgap field flux density in the gap is 0.85 T.
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- Q1: Start from first principles to prove that: "For a fixed flux density, the volume of the ferromagnetic core is directly proportional to the energy stored in the magnetic field".DETERMINE THE EMF GENERATED BY A 4-POLE SIMPLEX LAP WOUND ARMATURE HAVING 300 CONDUCTORS RUNNING AT 900 RPM. THE FLUX PER POLE IS 50mWba. If the material is the ideal material, N1I1 = 200, NIA = 100 and NIB = 150 If I am ampersand, what is the flux density in the middle of the air gap? okay? Calculate by drawing the magnetic circuit. b. If the material is not the ideal material (µr), the core material of each winding Find the inductance in terms of parameters c. What is mutual inductance between windings? D. Check the magnetic equivalent circuit of this system that there are no leakage fluxes. draw assuming. New magnetic with leakage fluxes in mind How about a circuit, draw?
- A 8 pole lap wound armature rotated at 350brpm is required to generate 260V. The useful flux per pole is about 0.05Wb. If the armature has 120 slots, calculate no.of conductor per slot and hence determine the actual value of flux required to generate the same voltage for wave wound.An iron ring mean length 100 cm with an air gap of 2 mm has a winding of 200 turns. If the permeability of iron is 600. When a current of 3 A flows in the winding, determine the flux density. Neglect fringing.What is the total flux at surface SA? What is the total flux at surface SB? What is the total flux at surface SC? What is the total flux at surface SD? What is the total flux at surface SE? What is the magnitude of an electric field passing through surface SC? What is the magnitude of an electric field passing through surface SD?
- find the flux density producedFrom a technicians standpoint, how is the stregth of an electromagnet typically varied? a) by varying the number of turns, b) by varying the current flow, C) by barying the core is permeability, d) none A bar of iron said to be saturated once most of its magnetic molecules are aligned whereby increases in magnetomotives force results in smaller and smaller increases in flux in the core. A) true, B) false which of the folloeing is?are tupe of AC genator construction. A) revolving field desing, B) stationary field desing, C) both a and b, D) none27. A bus bar is supported by insulators that are 36 in. apart. What force is exerted on each section of the bus bar under short-circuit conditions when the current is 25,000 amp and the perpendicularly directed flux density is 500 gauss?
- An iron ring of mean length 100 cm with an air gap of 2 mm has a winding of 500 turns. The relative permeability of iron is 600. When a current of 3 A flows in the winding, determine the flux density. Neglect fringing.i. Calculate the current that required to produce a flux density of 0.5 T in the central leg of the core. ii. Calculate the current that required to produce a flux density of 1.0 T in the central leg of the core? Is it twice the current in Q1(b) (i). iii. Calculate the reluctances of the central and right legs of the core under the conditions in Q1(b) (i). iv. Calculate the reluctances of the central and right legs of the core under the conditions in Q1(b) (ii). v. Explain the conclusion that you can make about reluctances in real magnetic cores.1. An 8-pole, wave-connected armature has 600 conductors and is driven at 625 rev/min. If the flux per pole is 20 mWb, determine the generated e.m.f.