Design of Basic Electro-mechanical Devices
Instructors:
Professor Dennis K. Lieu
Department of Mechanical Engineering
University of California, Berkeley, USA
(Tel) 510-642-4014
(Email) dlieu@newton.berkeley.edu
Description
Fundamental principles of magnetics, electro-magnetics, and magnetic materials as applied to
design and operation of electro-mechanical devices. Applied magnetic theory: magnetic motive
force, permeance, flux, intensity, leakage.
Properties of magnets and magnetic materials.
Principles of operation of basic electro-mechanical devices and their drivers. Design of actuators
and motors to meet force, torque, back EMF, and capacity requirements. Type and dimensional
synthesis and material specification for custom applications of linear and rotary actuators, stepper
motors, and DC brushless motors. Specification of poles, phases, winding patterns, and impedance.
Day 1:
Introduction. Review of fundamental magnetics theory.
Maxwell's Equations: Faraday's Law, Ampere's Law, Gauss' Law.
Lumped parameter models. MMF. Reluctance and permeance.
Flux linkages, speedance, inductance.
Energy and co-energy conversion. Maxwell's stress tensor. Forces and torques.
Properties of permanent magnets. Magnetizing process.
Day 2:
Simple reluctance devices.
Operation and control of voice coil actuators.
Brushless motors. Torque generation, timing, and commutation
Delta and Y windings
Motor control using switched DC. H-bridge controllers.
Use of HED's and FET's.
Day 3:
Losses and efficiency. Thermal considerations.
Insulation ratings. UL standards
Permanent magnet and VR stepper motors, pull-in and pull-out torque.
Magnetic circuit equivalents and permeance based calculation of torque.
Hybrid stepper motors. Magnetic circuit equivalents.
Textbook
Design of Basic Electro-Mechanical Devices (UB Berkeley ME229 Class Note)
Reference Textbooks
Magnetic Fundamentals and Motion Devices, H.D. Chai, Prentice Hall
Handbook of Electric Machines, S.A. Nasar; McGraw-Hill
Electro-mechanical Motion Devices, P.C. Krause, O. Wasynczuk; McGraw-Hill
Electro-magnetics, J.D. Kraus; McGraw-Hill
Electricity and Magnetism, E.M. Purcell; McGraw-Hill
Date
March 28-30 2001
Schedule
Registration : 8:30 -9:00 am first day
Lecture : 8:30 am – 5 pm each day
Lunch : Noon- 1 pm each day
Banquet : 5:30 –7:30 pm March 30
Class Room
218 (Multimedia Room) New Material Engineering Building
Hanyang University, Seoul, Korea
Registration Fee
500,000 Won (US$400), 50 % off for the graduate students
Class note, lunch and banquet included
Registration Deadline
March 16 2001
To register the shortcourse, contact
Program Administrator Yunjoo Cho
The BK21 Division for Research and Education in Mechanical Engineering,
Hanyang University
17 Haengdang-dong, Seongdong-ku
Seoul, 133-791, Korea
(Tel) 82-2-2290-1263
(Fax) 82-2-2299-1485
(Email) mebk22@email.hanyang.ac.kr
To have the course information, contact
Professor Gunhee Jang
Department of Mechanical Engineering, Hanyang University
17 Haengdang-dong, Seongdong-ku
Seoul, 133-791, Korea
(Tel) 82-2-2290-0431
(Fax) 82-2-2292-3406
(Email) ghjang@email.hanyang.ac.kr
(URL) http://prem.hanyang.ac.kr
http://www.me.berkeley.edu/prem