Q) A PMMC inst. with a 500-turn coil has a magnetic flux density in its air gaps of B = 0.4T. The coil dimensions are D=2 cm and L=2.5 cm. calculate the torque Tdef on the coil for a current of 3mA and its deflection constant %3D (Cder). If the device constant K = 15x10° degree/A, find: a)The spring (control) constant Ccon. b) Find the angle of deflection () for the input currents: 1,2,4, and 8mA. Conclude your results.

Q) A PMMC inst. with a 500-turn coil has a magnetic flux density in its air gaps of B = 0.4T. The coil dimensions are D=2 cm and L=2.5 cm. calculate the torque Tdef on the coil for a current of 3mA and its deflection constant %3D (Cder). If the device constant K = 15x10° degree/A, find: a)The spring (control) constant Ccon. b) Find the angle of deflection () for the input currents: 1,2,4, and 8mA. Conclude your results.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

Q6. A 4-pole wave-wound armature rotating at 400 rpm is required to generate 300 V. The effective flux per pole is about 0.05 Wb. If the armature has 120 slots, determine the suitable number of conductors per slot and hence determine the actual value of flux required to generate the same voltage. (Ans. 4; 46.875 mWb)
In figure, a magnetic flux of F is generated with a constant current of i. The core material used has a relative permeability of 4000. Assuming that the mean cross sectional area that the magnetic flux passing through in core is A=4 [cm2] and there is no fringing in air gap, N= 1000 turns and i=10 [A], lair=2 [mm]. what is the reluctance in air gap? what is the total reluctance? what are the flux and flux density in air gap? Remember: µ0 = 4πx10-7 Answers:Rair = ___________ [At/Wb]Rtotal = _________ [At/Wb]φ = ___________ [Wb]B = ________[T]
Explain in really basic terms what is electric and magnetic field ‘? What is TEM mode explain in very basic way anyone can understand?
A 500 A/5 A, 50 Hz current transformer has a bar primary. The secondary burden is a pure resistance of 1 Q and it draws a current of 5 A. If the magnetic core requires 250 AT for magnetization, the percentage ratio error is
Q1/ A / Discuss B-H curve of a ferro-magnetic material . B / Define the following terms (any three) : (i) MMF (ii ) magnetism. (iii ) Reluctance (v) flux density
Derive the self-inductance of ideal ac magnetic circuit in terms of the physical parameters of the circuit.
Q3) a PMMC instrument with a 100 turn coil has magnetic flux density in its air gaps of b-0.2 T. The coil dimensions are D lem. Calculate the torque on the coil for current of 1 mA.
What is the concept of the magnetic circuit? Give examples of DC analysis of magnetic circuits
Please solve it with proper explanation
Q2. A 4-pole, wave-wound armature has 72 slots with two coil-sides per slot, each coil has four turns. If the flux per pole is 20 mWb and the armature rotates at 720 rpm, what is the induced emf across the armature? (Ans. 276.48 V) 0.05
3Q) Analyze the relationship between flux produced by the moving coil and torque in a PMMC instrument.
The cross-sectional area of a transformer limb is 80 cm² and the volume of the transformer core is 5000 cm³. The maximum value of the core flux is 10 mWb at a frequency of 50 Hz. Taking the Steinmetz constant as 1.7, the hysteresis loss is found to be 100 W. Determine the value of the hysteresis loss when the maximum core flux is 8 mWb and the frequency is 50 Hz.