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ECE 320 Energy Conversion and Power Electronics
Spring 2009 Instructor: Tim Hogan (Notes from Prof. Elias Strangas)
Chapter 5: Three Phase Windings (Textbook Sections 4.3-4.7)
Chapter Objectives Flux linkage plays a crucial role in the operation of
ECE 320: Energy Conversion and Power Electronics
Exam 1 February 9, 2009 Prof. Tim Hogan Print your name: Student ID #:
This exam is out of 100 points. Read through the exam before starting and feel free to do the easier parts first. Show your work.
2400 2400 2400 H1 H2
A 2400 volt B three-phase three-wire C primary system
X3
X2
X1 120 volt one-phase two-wire service
2400 2400 2400 H1 H2
A 2400 volt B three-phase three-wire C primary system
X3
X2
X1 120 (V) 120 (V)
240 (V)
4160 4160
ECE 320: Energy Conversion and Power Electronics Spring 2009 Homework #7 (Due: Friday, May 1, 2009)
Name:
Circle or box your answer (dont forget units). Staple any additional paper used to arrive at your answers to this sheet.
1. A synchronous g
ECE 320 Energy Conversion and Power Electronics
Spring 2009 Instructor: Tim Hogan (Notes from Prof. Elias Strangas)
Chapter 6: Induction Machines (Textbook Sections 6.1-6.5)
Chapter Objectives The popularity of induction machines has helped to label
ECE 320: Energy Conversion and Power Electronics
Exam 2 March 23, 2009 Prof. Tim Hogan Print your name: Student ID #:
This exam is out of 100 points. Read through the exam before starting and feel free to do the easier parts first. Show your work. C
ECE 320 Energy Conversion and Power Electronics
Spring 2009 Instructor: Tim Hogan (Notes from Prof. Elias Strangas)
Chapter 7: Synchronous Machines and Drives (Textbook Chapter 5)
Chapter Objectives For induction machines, as the rotor approaches sy
ECE 320: Energy Conversion and Power Electronics Spring 2009 Homework #6 (Due: Friday, April 10, 2009)
Name:
Circle or box your answer (dont forget units). Staple any additional paper used to arrive at your answers to this sheet.
1. A 3-phase 2-
Exam 2: Monday, March 23, 2009 (please note the change in the date for this exam)
is,m
is,m is,r ir Bg
ir Bg
is
Bg is
ir
i s,r es Bg ir
is
i s,m
is,1 + is,m es Xm
is,r
RR
s s o
T
s
o
is,1 + is,m es Xm
is,r RR RR
o s o
RR
s s
ECE 320: Energy Conversion and Power Electronics Spring 2009 Homework #4 (Due: Monday, March 2, 2009)
Name:
Circle or box your answer (dont forget units). Staple any additional paper used to arrive at your answers to this sheet.
1. A three-phase
ECE 320 Energy Conversion and Power Electronics
Spring 2009 Instructor: Tim Hogan
Chapter 3: Transformers (Textbook Chapter 2)
Chapter Objectives In this chapter you will be able to: Choose the correct rating and characteristics of a transformer fo
ECE 320: Energy Conversion and Power Electronics Spring 2009 Homework #5 (Due: Monday, April 6, 2009)
Name:
Circle or box your answer (dont forget units). Staple any additional paper used to arrive at your answers to this sheet.
1. A 3-phase 2-p
ECE 320 Energy Conversion and Power Electronics
Spring 2009 Instructor: Tim Hogan
Chapter 4: Concepts of Electrical Machines: DC Motors (Textbook Sections 3.1-3.4, and 4.1-4.2)
Chapter Objectives DC machines have faded from use due to their relative
ECE 320 Energy Conversion and Power Electronics
Formula Sheet Transmission Lines
V = 1 T [Vmax cos(t + v )]2 dt = Vmax T o 2
v(t ) = Vmax cos(t + v ) i(t ) = I max cos(t + i )
V = V /v
I=
1 T [I max cos(t + i )]2 dt = I max T o 2
I = I /i
ECE 320: Energy Conversion and Power Electronics
Exam 2 March 23, 2009 Prof. Tim Hogan Print your name: Student ID #:
This exam is out of 100 points. Read through the exam before starting and feel free to do the easier parts first. Show your work. C
Transformer circuit for several example problems Turns ratio of 4000/120 Primary coil resistance R1 = 1.6 () Secondary coil resistance of R2 = 1.44 (m) Leakage flux that corresponds to Ll1 = 21 (mH), and Ll2 = 19 (H) Core Rc = 160 (k) and Lm = 450 (H