Delmar's Standard Textbook of Electricity (MindTap Course List)
6th Edition
ISBN: 9781285852706
Author: Stephen L. Herman
Publisher: Cengage Learning
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Question
Chapter 31, Problem 7RQ
To determine
The three factors that determine the amount of CEMF produced in the armature.
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Q2)a) consider the Circuit in figure 2 with initial conditions of Vc (o) = 5V, I₁ (o) = 1A,
(i) redraw the circuit in the frequency domain using laplace Wansforms.
(ii)
using this circuit derive an
equation for the Voltage across the inductor in the time domain..
3.12
ww
=V/3F
ZH
(figure 2)
d) Solve the following second order differential equation using laplace transforms.
d12
+
5 dx 3x=71
dt
-
with initial conditions x² (0) = 2, α(0) = 1
b) Another periodic waveform is defined by
T
c)
g(t)=
T
with g(t+mT) = g(t) and m is an integer.
(i)
Sketch g(t) over two full cycles in the time domain, labelling the axes.
(ii)
Derive the formulae for the complex Fourier coefficients c₁ for g(t).
For a periodic waveform h(t), if its complex Fourier coefficients are
T
T
when n is odd
T
2n²²
T
4nn
when n is even and not zero
4nn
please derive the first five non-zero terms of the real Fourier series for h(t).
Q3)α) f(t) = (-+- 1 Isto
f(t+mT) = f(t).
L+- I Ost ST
integer
(i) sketch f(t) 2 full cycles time domain. (labelling the axis).
(ii) Derive the formula for the real fourier Coefficients
(i) Real Fourier series f(t), first 5 non-terms.
an
bn for f(t).
Chapter 31 Solutions
Delmar's Standard Textbook of Electricity (MindTap Course List)
Ch. 31 - Prob. 1RQCh. 31 - Prob. 2RQCh. 31 - Prob. 3RQCh. 31 - Prob. 4RQCh. 31 - What type of motor is known as a constant-speed...Ch. 31 - What is CEMF?Ch. 31 - Prob. 7RQCh. 31 - Prob. 8RQCh. 31 - Prob. 9RQCh. 31 - What type of motor should never be operated at no...
Ch. 31 - Prob. 11RQCh. 31 - What is the most common way of changing the...Ch. 31 - Prob. 13RQCh. 31 - Prob. 14RQCh. 31 - What device is used to disconnect power to the...Ch. 31 - Prob. 16RQCh. 31 - Who was the first person to establish a...Ch. 31 - One horsepower is equal to how many W?Ch. 31 - A motor is operating a load that requires a torque...Ch. 31 - The motor in Question 19 is connected to a 250-VDC...Ch. 31 - Prob. 1PA
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