ECE 331- Electromechanical Energy Conversion
Catalog Description: Non-Linear Magnetic Circuits. Principles of Energy
Conversion; inductance variation; motor configurations. Transformers. Induction
Motors. Synchronous Motors and Generators. DC Motors. Power Electronic Devices.
Prerequisites:
By course: ENGR 201, 202
By topic: Magnetic circuits, Alternating current steady-state circuits, Mechanical
concepts of torque, angular velocity, power and energy.
Courses that require this as a prerequisite: ECE 432 - Electromechanical
Energy Conversion II
Credits: 4 Terms Offered: Winter (odd years); Spring (even years)
Instructors:
Primary: A. Wallace
Secondary: A. von Jouanne
Textbook: Principles of Electric Machines and Power Electronics (2nd
Edition), P.C. Sen, J. Wiley, 1997, ISBN 0-471-02295-0.
References: Class Notes, Campus Copy, 1998
Course Learning Objectives:
Students are expected to demonstrate the ability to:
- Identify the implications of non-linear materials in magnetic circuits (ABET
Outcomes a, c)
- Analyze the performance of single- and three-phase transformers (ABET Outcomes
a, c, k)
- Analyze the performance of three-phase induction motors and generators (ABET
Outcomes a, c, k)
- Analyze the performance of synchronous motors and generators (ABET Outcomes
a, c, k)
- Analyze the performance of dc motors and generators (ABET Outcomes a, c,
k)
- Identify the differences of design, construction and application between
induction, synchronous and dc motors (ABET Outcomes a, c, e, k)
- Identify power electronic devices used in the control of electromechanical
machines (ABET Outcomes a, c, e, k)
Topics
- Magnetic-flux circuits, magnetic materials, permanent magnets, Non-linear
magnetic circuit design including permanent magnets, effect of airgaps, single-and-three-phase
transformers and their design, rating and construction.
- Balanced Y-and ?-connected, three-phase circuits, with measurements of power
and VArs using either three or two wattmeters (review).
- Principles of electromechanical energy conversion.
- Polyphase induction machine, wound-rotor and squirrel-cage types, design
for specific characteristics.
- Single-phase induction machines; split-phase, capacitor-run, capacitor-start,
and shaded- pole types, linear machines.
- Polyphase cylindrical-rotor and salient rotor design and performance comparisons
for synchronous machines; armature reaction and synchronous reactance.
- Direct-current machines, methods of connection of the field windings, armature
reaction, effects of design on performance, effects of interpoles and of a
compensating winding.
- Introduction to power electronics in control of electric machines.
- Tests
Laboratory Projects
- Saturable magnetic circuits; effects of airgaps.
- Transformer testing to determine equivalent circuit parameters, efficiency
and regulation.
- Techniques of 3-phase power measurements with load power factors of wide
ranges, leading and lagging.
- Demonstrations of: linear induction motor; introduction to effects of electronic
frequency change with both synchronous and induction motor; switched reluctance
machine.
- Homework assignment to design an induction motor to produce specified torque/speed
characteristics.
- Induction motor testing; equivalent circuit parameters.
- D.C. generator tests; shunt field, series field, compounding characteristics.
Structure: Three 50 minute lectures per week. Seven 3 hour lab sessions.
Original: 1/01-4/01
Revised: 9/01