6.11s Design of
Electric Motors, Generators and Drive Systems
This course
focuses on the analysis and design of electric motors, generators, and drive
systems. Special emphasis will be
placed on the design of machines for electric drives. This course will focus on fundamentals by using commercially
available software for mathematical analysis (MATLAB) in the context of
design. Extensive ``hands-on''
exposure will be provided through computer based laboratory exercises.
The
construction of aggressive, high-performance motor drives requires a detailed
understanding of machine characteristics and associated interactions with power
electronic drives. The successful
application of modern control techniques, such as field-oriented control,
depends critically on an intimate knowledge of machine parameters and
characteristics. Lower shaft
horsepower drives, for example, may exhibit a relatively speedy decay of
electrical
transients in
comparision to mechanical transient settling times. In very large drives, the situation can be reversed. Even for drives employing machines of
the same general type, appropriate analytical approximations, thermal
management and modeling, control techniques, and transient performance and
disturbance rejection for low and for high power drives may therefore be very
different. Computer-based tools
for estimating machine parameters and performance can remarkably speed a
designer's understanding of when different control and machine design
assumptions are applicable, and how gracefully these assumptions fail as
performance limits are approached.
In this
course, fundamental principles of energy conversion, applicable to all types of
electric machinery, are first reviewed to provide analytical foundations for
understanding all types of drives. The specific principals of the basic machine
types, including synchronous, induction and variable reluctance machines, are
then
introduced. Extensive use of computer-based
analysis tools will be made as the major classes of machines and their physical
basis for operation are reviewed.
Next, control strategies for the different machine types will be
discussed, all with extensive use of computer-based simulation tools. Finally, very high performance machine
designs, such as extremely high speed drives, will be examined. Throughout the course, performance
considerations, trade-offs, and different design approaches will be presented.
Access to computer facilities and analysis routines will be provided
for practice
machine analysis and design.
Required
Background
A basic
knowledge of electric circuit analysis and working
familiarity
with principles of electromagnetism is assumed.
Program
Description
Lectures will
be given in the morning of each day, Monday through
Friday, of
the program. In the afternoons
students will work with the
instructors
in a computer facility to explore and develop design
routines for
electric drives. Registrants will
receive course notes,
reprints of
references and a suite of programs written in MATLAB for
assisting in
the design of electric machines.
Topics:
á Elements of energy conversion: energy,
co-energy, force and torque as derivatives of energy, field- based force
calculations.
á Energy conversion in electric machines:
force and shear density, machine power density and efficiency.
á Review of the principles of the basic
machines types: synchronous, induction, variable reluctance.
á Introduction to and exercises in the use
of MATLAB.
á Induction machines in some depth:
reduction to an equivalent
á circuit and calculation of the elements
of the circuit.
á Performance evaluation of induction
machines.
á Field-oriented control of induction
machines.
á Permanent magnet machines: review of
basics, principals of energy conversion and design fundamentals.
á Control strategies for PM machines:
torque/speed limitations, taking advantage of negative saliency, elements of
field oriented control.
á Unusual machine designs
Instructors
James L.
Kirtley Jr. attended the Massachusetts Institute of
Technology, earning the S.B., S.M., E.E. and Ph.D degrees in 1968, 1968, 1969
and 1971, respectively. He joined
the faculty at MIT in 1971 and is now Professor of Electrical Engineering. In
1974 and 1975 he was with General Electric in Schenectady, New York. In 1993 and 1994 he was Visiting
Professor at the Swiss Federal Institute of Technology in Zurich. In 1998 he
joined SatCon Technology Corporation as Vice and General Manager of the Tech
Center. He returned to MIT full time in 2000 and continues a close association
with SatCon, as Corporate Chief Scientist and Director.
Dr. Kirtley
is a specialist in electric machinery and electric power systems
engineering. He has participated
in broadly based research and development programs in several related areas,
including superconducting electric machinery, large machinery for ship
propulsion, monitoring of electric power systems and equipment, magnetic
bearings and magnetic levitation and design of electric machinery. In addition to core subjects in
electrical engineering and computer science, his teaching activities include
graduate and undergraduate subjects in electric machinery and an undergraduate
project laboratory subject in digital electronic systems.
Dr. Kirtley
has published more than 40 articles in journals and IEEE magazines and more
than 30 conference papers. He is holder of 14 US patents.
Dr. Kirtley
is a Fellow of IEEE. He was
recipient of one of the IEEE Third Millenium Medals (2000) and is the recipient
of the 2002 Nikola Tesla Award
Dr. Kirtley
serves as Editor in Chief of the IEEE Transactions on Energy Conversion and as
Chair of the Nikola Tesla Award Committee He is a member of CIGRE and a National Expert for Study
Committee 11. He is a member of
the editorial board of Electric Machines and Power Systems. He served as Conference Chairman of the
International Conference on Electric Machines, 1990, and was Program Chair of
the International Electric Machines and Drives Conference, 2001, both
conferences were held in Cambridge, MA.
Dr. Kirtley is a Registered Professional Engineer in Massachusetts.
Steven B.
Leeb received his Bachelor of Science and
Doctoral degrees from the Massachusetts Institute of Technology in 1987, and
1993, respectively. He currently
serves as an Associate Professor in the Laboratory for Electromagnetic and
Electronic Systems. Dr. Leeb is concerned with the design, analysis,
development, and maintenance processes for all kinds of machinery with
electrical actuators, sensors, or power electronic drives. He is particularly interested in the
study of mechatronics. Mechatronic
devices are high performance systems designed to exhibit an extraordinary power
density,
volume, range or quality of motion, or combination of these and other
qualities. A major thrust in his
current research is the development of power electronic drives and supplies for
servomechanical and industrial applications, including medical drug delivery
devices, battery chargers, motion controllers and fluorescent lamp ballasts.
He is the
author or co-author of over 50 publications and 9 patents in the fields of
electromechanics and power electronics.
He is a senior member of the IEEE.
He has recently served as guest editor for a special issue of the IEEE
Transactions on Digital Control in Power Electronics. He also serves as an officer in the IEEE Power Electronics
Society. He has received a number
of teaching awards at MIT, including the Bose and Spira teaching prizes.
For More
Information about this and other
Summer Professional Programs, contact MIT's
Office of Summer Professional
Programs