Course detail

Electrical Drives

FSI-RRYAcad. year: 2017/2018

Content annotation : The course deals with the operating theory, practical design approaches, and manufacturing methods applied for the most commonly used types of motors.It does not focus only on the design or the theory .Also discussed are the following topics: electromechanical forces and torques, electromagnetic forces, energy approach, magnetic materials,insulation,bearing systems,theory of DC motors,different types of DC motors, induction asynchronous and synchronous motors,brushless DC motors, switched reluctance motors, piezomotors,stepping motors,requirements for motor applications , speed-torque characteristics,controls circuits, feedback element, semiconductors supply units.

Learning outcomes of the course unit

Characteristics of obtained knowledge and skills : Students will be provided with the latest information about small electric motors, supply electronic unit, control circuits ,encoders ,gearheads etc.In laboratory exercises,the students will verify the parameters and characteristics of different types of DC motors,AC motors,stepping motors,piezomotors etc. All the mentioned types of motors can be used in different mechatronic systems.


Knowledge and skills students are expected to have when they begin the course : Basic knowledge of electrical engineering, mechanics and laboratory works.


Not applicable.

Recommended optional programme components

Not applicable.

Recommended or required reading

Stemme,O.,Wolf,.: Principles and properties of Highly Dynamic DC Miniature Motors. Interelectric AG,1994.
O. Kelly: Performance and Control of Electrical Machines, , 0
Accarnley,P.: Stepping Motors -a quide to modern theory and practice . IEE Control Engineering Series 19,1984.
T.Kenjo.,A.Sugawara .: Stepping motors and their microprocessor controls. Second edition.Clarendon press,Oxford 2000.
W.H.Yeadon,A.W.Yeadon.:Handbook of Small Electric Motors. McGraw Hill, 2004
Ueha,Tomikawa, Kurosawa,Nakamura.:Ultrasonic motors - Theory and Applications.

Planned learning activities and teaching methods

The course is taught through lectures explaining the basic principles and theory of the discipline. Exercises are focused on practical topics presented in lectures.

Assesment methods and criteria linked to learning outcomes

Requirement for credit award,exam form and way and rules of final course classification: Running evaluation of work in laboratory and numerical exercises.The exam has a written and an oral part.

Language of instruction


Work placements

Not applicable.


Course objective : The aim of the course is to make students familiar with small electric machines and microdrives. Students can apply the knowledge acquired in this course for their semestral works,diploma projects,diploma theses and last but not least in their future jobs.

Specification of controlled education, way of implementation and compensation for absences

Attendance at practical training is obligatory.

Classification of course in study plans

  • Programme B3A-P Bachelor's

    branch B-MET , 3. year of study, summer semester, 5 credits, compulsory

Type of course unit



26 hours, optionally

Teacher / Lecturer


Teaching methods :
Lecture 13 x 2 hrs.
seminars in computer labs 13 x 1 hrs.
1. Introduction.Table of contents. References. Essential terms. Study sources.
2. Loses and warming of electric machines , kinds of load, dimensioning.
3. Electromechanical parts of microdrives.
4. Miniature classic and self supported winding of DC motors with permanent magnets.
5. DC motors with miniature cylinders and discs types.
6. Control of current, speed and position of microdrives.
7. DC micromotors - electronically commutated types.
8. Stepping motors, drive circuits, accurate positioning with load.
9. Switched reluctance motors and drives.
10.Piezomotors,types, functions,applications.
11.Small AC motors, types, functions, characteristics.
12.Special designs,encoders, control circuits/Smart Power IO, gearheads.
13.New trends in micromotors and microdrives, application area.

Computer-assisted exercise

13 hours, compulsory

Teacher / Lecturer


Seminars in computer labs.
1. Introduction, laboratory regularity,laboratory devices.
2. Simplified equation of motion, thermal effects.
3 Measuring of moment of inertia in a small rotor.
4. Measure of speed, torque and position on the shaft of a motor.
5. Steady state and dynamic characteristics of small DC motors.
6. PCU 2000 Unit- servodrive with DC motor (permanent magnet).
7. Stepping motors, measuring of positioning and parameters.
8. Electric microdrives with 3phase stepper motor/linear and rotating.
9. Dynamics of switched reluctance motor.
10.Programming of position shaft of a microdrive with PCU 2000 Unit.
11.Linear and rotating piezomotors -characteristics.
12.Optimization of parameters of PID Controller/servodrive.
13.Behaviour of micromotors with change of their parameters - Bifurcation analyse.