Name:
Date:
Section:
ECE 431 Electric Machinery Spring 2014
Pre-lab assignment #4
Due at the beginning of your lab session no late Pre-lab assignments accepted.
1. List the tests that you will perform.
2. What is the mechanical synchronous speed of a 6-po
Name:
Lab Section:
Date:
ECE 431 Electric Machinery Spring 2014
Pre-lab assignment #2
Due at the beginning of your lab session no late Pre-lab assignments accepted.
1. List the tests that you will perform in experiment 2.
2. Figure 2.4 in the
Name:
Date:
Lab Section:
ECE 431 Electric Machinery Spring 2014
Pre-lab assignment #1
Due at the beginning of your lab session no late pre-lab assignments accepted.
1. Read Experiment #1. In your own words, what are the objectives of the experiment?
2. A
ECE 431 homework assignment #8 (Due Friday, April 6, 2012)
1. Text problem 7.4 (hint: rated current will provide rated output mechanical power at
the speed given)
2. A dc machine has the following parameters:
Armature resistance 0.1 , armature inductance
ECE 431 homework #1 (Due Monday (in class), February 3, 2014)
Problem 1.1
A balanced, 3-phase, 3-wire, 60Hz, wye-connected source has a line-line voltage of 4160V. It
is connected to a three-phase wye-connected load whose impedance is 100 + j75.4 .
a. Fin
ECE 431 Electric Machinery
Spring 2008
Homework Assignment #1
Due in class Friday, January 25, 2008.
Text problems refer to Fitzgerald, Kingsley, and Umans, 6th edition.
1. Text problem 1.1, with the following changes:
- Use a core material permeability o
ECE 431 Homework #3 (Due Monday, February 15, 2016)
Problem 3.1
Text problem 3.26
Problem 3.2
A variable reluctance machine has a 8/6
configuration, as illustrated below. There are four
winding sets, not shown, in counter-clockwise
sequence on the stator
ECE 431 homework assignment #10 (Due Monday, May 2, 2016)
A dc machine has the parameters:
Rated armature voltage
Rated armature current
Rated speed
Maximum speed
500
350
1000
3000
V
A
rpm
rpm
Armature Resistance
Armature Winding Inductance
Inertia
0.02
0
ECE 431 homework assignment #1 (Due Monday, February 1, 2016)
Special problem #1
The following three-phase, balanced loads are connected across a three-phase, wyeconnected source (60 Hz and 208 V line to line). The nature of the three loads are
described
ECE 431 homework assignment #6 Spring 2016
Participate actively in Engineering Open House on March 11-12, 2016. There will be a
number of ways to participate in the power lab. If you do so, be sure to sign in on the
participation forms that will be availa
ECE 431 homework #4 (Due Friday, February 26, 2016)
Problem 3.1
A 2-pole, 3phase, 900V, 60Hz, induction motor has R2=0.25 Ohm, R1= 0.3 Ohm, L1=
L2= 1.5 mH, Lm=40mH. Neglect core and mechanical losses.
a) What is the starting current and torque of this mac
ECE 431 homework assignment #9 (Due Monday, April 25, 2015)
Q1
A DC shunt motor has an armature resistance of 0.05 Ohms and a field resistance
of 200 Ohms. A no-load speed of 1850 rpm is obtained when the motor is
connected to a 300V supply. The motor is
ECE 431 homework assignment #5 Due Friday, February 22, 2008
1. Text problem 6.3
2. Text problem 6.5
3. Text problem 6.17, parts a and b only
4. Text problem 6.21
5. An induction machine has the following nameplate ratings:
460 V, three-phase, 60 Hz, 10 A
ECE 431 homework assignment #7 (Due Friday, March 14, 2008)
Note that in the text notation, the stator-to-rotor mutual inductance is our M which is
closely related to our kf (the difference between M and kf is the factor of 2 to account for
peak vs. RMS v
ECE 431 homework assignment #6 Due Friday, March 7, 2008
Participate activity in Engineering Open House, either by participation in events in room 50
Everitt or by heavy, documented involvement in another EOH exhibit.
ECE 431 homework assignment #8 (Due Friday, March 28, 2008)
1. A field trip overview will be posted in the next few days. Please work with your lab
group to select three topic choices, in order, by Friday at the latest. Send your top three
choices, in ord
ECE 431 homework assignment #10 (Due Friday, April 25, 2008)
1. A dc machine has the following nameplate data and winding data:
Nameplate:
Winding data:
Rated armature voltage
240 V dc
Resistance 0.03
Rated armature current
175 A dc
Inductance 0.5 mH
Rat
ECE 431 homework assignment #9 (Due Friday, April 18, 2008)
1. A dc machine has the following nameplate data and winding data:
Nameplate:
Winding data:
Rated armature voltage
240 V dc
Resistance 0.03
Rated armature current
175 A dc
Inductance 0.5 mH
Rate
ECE 431 homework assignment #3 Due Friday, February 8, 2008
1. A variable reluctance machine has a 6/4 configuration, as illustrated in Fig. 8.5. There are
three windings, each labeled as phases in the figure. Each winding can have either positive or
nega