At the era of the 21 century, magnetic levitation and suspension have been introduced into some practical applications. There are maglevs such as the JR Yamanashi Maglev, the Linimo train in Nagoya, and the Shanghai Maglev. On the other hand, bearingless motor water pumps for pure water, magnetic bearings for turbo molecular pumps are used in semiconductor processes. In this course, students will study super conductor magnetic levitation, Maglev train systems, magnetic bearings, and bearingless motors.
Students learn materials for magnetic suspensions and levitations such as super conductors, permanent magnets, electro magnets, etc. They also learn magnetic circuit analysis, principles and examples of electro dynamic magnetic levitation, super conductor bulk magnetic levitation, eddy current type magnetic levitation, electro-magnet type magnetic levitation including MAGLEV trains, magnetic bearings and bearingless motors.
Maglev, magnetic suspension, magnetic levitation, magnetic bearing, bearingless motor
|Intercultural skills||Communication skills||Specialist skills||Critical thinking skills||Practical and/or problem-solving skills|
Overview, demonstration of magnetic suspension or video, lecture, quiz and report.
|Course schedule||Required learning|
|Class 1||01 Purposes , contents of this lecture||Evaluation methods and office hours are presented. Introduction to magnetic bearing and bearingless motor. Demonstration of magnetic suspension.|
|Class 2||02 Application of bearingless motors||Based on the text book, chapter 21, some applications of bearingless motors are presented. Why these applications need magnetic suspension? How effective magnetic suspension? Demonstration of magnetic suspension is included.|
|Class 3||03 Analysis of magnetic circuits.||simple magnetic circuits, analysis, electro magnetic force, non linearity, flux density reluctance, MMF, flux linkage.|
|Class 4||04 Analysis of permanent magnet circuits||BH curves, various kinds of permanent magnets, equivalent representation, magnetic circuit analysis, attractive force.|
|Class 5||05 Radial magnetic bearing||Structure and principle of radial magnetic bearing, current, MMF, magnetic circuit, magnetic force analysis|
|Class 6||06 Simple representation of magnetic bearing||Force and current relationship, linearization, displacement-force factor, block diagram of radial magnetic bearing|
|Class 7||07 Controller requirement of magnetic bearing||Instability of magnetic suspension, feedback controller configuration and design|
|Class 8||08 Controller parameter adjustments of magnetic bearing||Parameters and response, external force suppression and displacements, integral controller|
|Class 9||09 power electronics, introduction of bearingless motors.||power electronics and bearingless|
|Class 10||10 Project||report|
|Class 11||11 Maglev systems Yamanashi||Structure, super conductor coils, propulsion, levitation coils, test ride video, picture, construction, latest news.|
|Class 12||12 Maglev system; Linimo||Structure, characteristics, history of Linimo, low speed magnetically levitated train. Propulsion, levitation, electromagnetic force generation, feedback control system.|
|Class 13||13 Trans Rapid Maglev system||Structure, high speed train, propulsion, electric power supply, magnetic levitation, Shanghai maglev, video, status.|
|Class 14||14 Other maglev systems||Miyazaki maglev system, structure, principle of propulsion, magnetic levitation, some other maglevs are introduced.|
|Class 15||15 Applications of magnetic suspension and magnetic levitation.||Water power plant with magnetic bearing, some other applications are presented.|
Report 60%, project report 20%, exam 20%
Fundamentals of Electric Machinery, Power Electronics should be learned.