Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Electrical & Electronics Expert

1) a) prepare down the comparisons of the electric circuits and magnetic circuits.

b) Also describe the factors that are need to be considered for selecting the specific electric loading and specific magnetic loading?

2) A 15 kW, 230 volt, 4 pole dc machine has the following data:
Armature diameter = 0.25 m, armature core length = 0.125 m, length of the air gap at the pole centre=2.5mm, flux per pole=11.7 mWb, ratio of pole arc to pole pitch=0.66. Determine the e.m.f needed for the air gap.

a) If armature surface is considered as smooth and

b) If armature is slotted.

3) Determine the chief dimensions of the 200 kW, 250 volt, 6 pole, 1000 rpm generator. The maximum value of flux density within the air gap is 0.87 Wb/m2 periphery are 31000. The ratio of the pole arc to pole pitch is 0.67 and the efficiency is 91 percent. Suppose the ratio of length of core to pole pitch = 0.75.

4) A 4 pole,25 HP,500 Volt,600 rpm series motor has the efficiency of 82%. The pole faces are square and the ratio of pole arc to pole pitch is 0.67. Consider Bav=0.55 Wb/m2. Find the major dimensions of the core and particulars of a appropriate armature winding.

5) a) Deduce the expression for the output equation of a 3 phase transformer?

b) find out the dimensions of the core and window for a 5 kVA, 50 Hz,1 phase, core type transformer. A rectangular core is used with the long side twice as long as short side. The window height is 3 times the width. Voltage per turn=1.8 Volt, Space factor=0.2, current density=1.8 A/mm2 and the ampere conductors per metre of the armature, Bm=1 Wb/m2.

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M913282

Have any Question? 


Related Questions in Electrical & Electronics

A source of strength 15 m2s at the origin is combined with

A source of strength 1:5 m 2 /s at the origin is combined with a uniform stream moving at 9 m/s in the x direction. For the half-body which results, find (a) The stagnation point; (b) The body height as it crosses the y ...

A clean 15--efficient module stc 1 m2 in size has its own

A clean, 15-%-efficient module (STC), 1 m2 in size, has its own 90% effi- cient inverter. Its NOCT is 44° C and its rated power degrades by 0.5%/° C above the 25° C STC. a. What would its STC rated power be? b. Find the ...

1 describe briefly your concept of a scalar field and

1. Describe briefly your concept of a scalar field and illustrate with an example. 2. Describe briefly your concept of a vector field and illustrate with an example. 3. How do you depict pictorially the gravitational fie ...

The tank in the previous problem feeds two lines a 4-cm

The tank in the previous problem feeds two lines, a 4-cm pipe that exits 10 m below the water level in the tank and a second line, also 4 cm in diameter runs from the tank to a station 20 m below the water level in the t ...

1 what does the word retarded in the terminology retarded

1. What does the word retarded in the terminology retarded magnetic vector potential refer to? Explain. 2. Discuss the application of the magnetic vector potential in the determination of the electromagnetic fields due t ...

1 discuss the relationship between b and h for a

1. Discuss the relationship between B and H for a ferromagnetic material. 2. Summarize the constitutive relations for a material medium. 3. What is the propagation constant for a material medium? Discuss the significance ...

1 a determine the transfer function vosv1 s for the circuit

1. (a) Determine the transfer function Vo(s)/V1 (s) for the circuit shown below. (b) From the transfer function identify what type of filter it is. (c) Justify your answer of part b 2. (a) Draw the circuit of a free runn ...

1 describe the phasor technique of solving a differential

1. Describe the phasor technique of solving a differential equation for the sinusoidal steady-state solution. 2. State Coulomb's law. To what law in mechanics is Coulomb's law analogous? 3. What is the definition of the ...

Assume you want to write a program to simulate the

Assume you want to write a program to simulate the permutation boxes in Figure 31.8 in the text. a. Show how you represent each box as a table. b. Show the inversion of each box as a table.

Through a series of tests on pipe flow h darcy derived an

Through a series of tests on pipe flow, H. Darcy derived an equation for the friction loss in pipe flow as in which f is a dimensionless coefficient that depends on (a) the average velocity v of the pipe flow; (b) the pi ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro