2021 Magnetic Levitation and Magnetic Suspension

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Academic unit or major
Graduate major in Electrical and Electronic Engineering
Chiba Akira 
Course component(s)
Lecture    (ZOOM)
Day/Period(Room No.)
Mon3-4()  Thr3-4()  
Course number
Academic year
Offered quarter
Syllabus updated
Lecture notes updated
Language used
Access Index

Course description and aims

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.

Student learning outcomes

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.
They learn MAGLEV trains, magnetic bearings and bearingless motors.

Course taught by instructors with work experience

Applicable How instructors' work experience benefits the course
A lecturer has rich practical development experiences in magnetic levitation and suspension. He has developed bearingless motors for last 30 years including the one brought into the world for the first time.


Maglev, magnetic suspension, magnetic levitation, magnetic bearing, bearingless motor

Competencies that will be developed

Specialist skills Intercultural skills Communication skills Critical thinking skills Practical and/or problem-solving skills

Class flow

Overview, demonstration of magnetic suspension or video, lecture, quiz and report.

Course schedule/Required learning

  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.

Out-of-Class Study Time (Preparation and Review)

To enhance effective learning, students are encouraged to spend approximately 100 minutes preparing for class and another 100 minutes reviewing class content afterwards (including assignments) for each class.
They should do so by referring to textbooks and other course material.



Reference books, course materials, etc.


Assessment criteria and methods

Report 60%, project report 20%, exam 20%

Related courses

  • EEE.P301 : Electric Machinery and apparatus
  • EEE.P311 : Power Electronics

Prerequisites (i.e., required knowledge, skills, courses, etc.)

Fundamentals of Electric Machinery, Power Electronics should be learned.


Execise is carried out through Hanbook application. Bring your smart phone, pc, or tablet.

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