HW3
EE 448 Introduction to AC Circuits and Motors
Due Wednesday, April 9, 5:00 pm
Answers must be accurate to within 3 significant figures!
(
Problem 1: A voltage is given by v ( t ) = 19 cos 2111t + 170o
)
mV . Find: (15 points Total)
a) The frequency in
HW2
EE 448 Introduction to AC Circuits and Motors
Due Wednesday April 2, 5:00 pm
Answers must be accurate to within 3 significant figures!
Problem 1: Assume that you have a DC motor with the following magnetization curve over the operation
range of intere
HW3
EE 448 Introduction to AC Circuits and Motors
Due Thursday, April 7
Answers must be accurate to within 3 significant figures!
Problem 1: A voltage is given by v t 19sin 2111t 170o
a)
b)
c)
d)
e)
mV . Find: (15 points Total)
The frequency in Hz. (2 poi
HW5
EE 448 Introduction to AC Circuits and Motors
Due Wednesday December 5, 5:00 pm
Answers must be accurate to within 3 significant figures!
Problem 1: For this problem, you have a 8 pole, 3-Phase Y-connected 60 Hz AC induction motor
connected to a power
HW2
EE 448 Introduction to AC Circuits and Motors
Due Wednesday October 31, 5:00 pm
Answers must be accurate to within 3 significant figures!
Problem 1: Assume that you have a DC motor with the following magnetization curve over the operation
range of int
HW3
EE 448 Introduction to AC Circuits and Motors
Due Wednesday November 7, 5:00 pm
Answers must be accurate to within 3 significant figures!
(
Problem 1: A voltage is given by v ( t ) = 4 cos 200 t + 120o
a)
b)
c)
d)
e)
)
mV . Find: (20 points Total)
The
HW2
EE 448 Introduction to AC Circuits and Motors
Due Thursday, March 31
Answers must be accurate to within 3 significant figures!
Problem 1 -2 refer to the following motor: Assume that you have a DC motor with the following
magnetization curve over the o
APPENDIX C
PC.1 Because the capacitor voltage is zero at t = 0, the charge on the capacitor is zero at t = 0. Then using Equation 3.5 in the text, we have
q(t ) = i (t )dx + 0
0 t
t
= 3dx = 3t
0
For t = 2 s, we have q(3) = 3 2 10 6 = 6 C PC.2 Refer to Fig
Student Name:
Lab Partner Name:
Total Grade (Out of 100 pts):
Introduction to Permanent Magnet Synchronous Generators for Wind Applications
EE 448 Lab 4
Purpose
The purpose of this lab is to provide a brief introduction to Synchronous Generators used in w
Student Name:
Lab Partner Name:
Total Grade (Out of 200 pts):
Basic AC Circuit Analysis
EE 448 Lab 3
Purpose
Passive AC circuit elements consist of resistors (R), inductors (L), and capacitors(C) and are best analyzed by
phasor domain circuit analysis.
In
Student Name:
Lab Partner Name:
Total Grade (Out of 100 pts):
Introduction to DC Motors
EE 448 Lab 1
Purpose
The purpose of this lab is to provide and introduction to DC Motors. In this lab, you will examine the
construction of some real DC motors as well
Student Name:
Lab Partner Name:
Total Grade (Out of 100 pts):
Introduction to Stepper Motors
EE 448 Lab 2
Purpose
The purpose of this lab is to provide and introduction to Stepper Motors. Stepper motors provide very precise
control for a wide variety of a
Student Name:
Lab Partner Name:
Total Grade (Out of 100 pts):
Modern Three-Phase Motor Control
EE 448 Lab 5
Purpose
The purpose of this lab is to explore the basic operation of a modern 3 phase motor and its controller. In class,
we learned that the speed
EE 448 Introduction to AC
Circuits and Motors Final Exam
Spring 2014
EE 448 Introduction to AC
Circuits and Motors
Timothy A. Bigelow
1
Exam Time and Location
LOCATION:
2245 Coover
TIME:
Thursday, May 8
2:15-4:15 pm
2
Exam Format
4 Problems
Closed book/no
Sinusoidal Steady-State Analysis
EE 448 Introduction to AC Circuits
and Motors
Spring 2014
1
The Sinusoidal Source
v (t )
= Vm cos (t + )
2
= = 2 f
T
t=
( # degrees ) =
180o
( # radians )
2
Sinusoidal Source Example
i (t )
= 3cos 20 t + A
3
Find the peri
HW0 Review of Complex Numbers
EE 448 Introduction to AC Circuits and Motors
Due Friday, March 11
Answers must be accurate to within 3 significant figures!
Problem 1: Write each of the following complex numbers in polar form (A e j ) with phase
between and
a Total Grade [Out of 100 pts): 1
Introduction to Permanent Magnet Synchronous Generators for Wind Applications
EE 448 Lab 5
Purpose ,
The purpose of this lab is to provide a brief introduction to Synchronous Generators used in wind applications.
In this
HW5
EE 448 Introduction to AC Circuits and Motors
Due Wednesday December 3, 5:00 pm
Problem 1: Assume that for the circuit below, Vab 700 Vrms , Z motor 15 j 9 , and Z line 1.0 j1.0 .
What is the line current I , the voltage V , and the total time average
HW0 Review of Complex Numbers
EE 448 Introduction to AC Circuits and Motors
Due Friday October 24, 5:00 pm
Answers must be accurate to within 3 significant figures!
Problem 1: Write each of the following complex numbers in polar form (A e j ) with phase
b
/
EE448 - Fall 2014
SECOND EXAM
November 21, 2014
This is a closed book/notes exam.
You are allowed to use a calculator.
There is a formula sheet attached at the end of the exam.
Show all of your work for full credit.
HINT: The easiest problem may not be
HW3
EE 448 Introduction to AC Circuits and Motors
Answers must be accurate to within 3 significant figures!
(
Problem 1: A voltage is given by v ( t ) = 19sin 2111t + 170o
a)
b)
c)
d)
e)
)
mV . Find: (15 points Total)
The frequency in Hz. (2 points)
The r