# Electric Motion Systems

 Title ΣΥΣΤΗΜΑΤΑ ΗΛΕΚΤΡΟΚΙΝΗΣΗΣ / Electric Motion Systems Code ΕΝ1208 Faculty Engineering School Electrical and Computer Engineering Cycle / Level 1st / Undergraduate Teaching Period Winter Coordinator Charalampos Dimoulias Common No Status Active Course ID 20002018

 Academic Year 2017 – 2018 Class Period Winter Faculty Instructors Weekly Hours 3 Class ID 600106873

### Class Schedule

 Building Πολυτεχνείο (πτέρυγα Γ) Floor Όροφος 1 Hall Α6 (6) Calendar Τρίτη 11:00 έως 14:00
Course Type 2016-2020
• Scientific Area
Course Type 2011-2015
Specific Foundation / Core
Mode of Delivery
• Face to face
Language of Instruction
• Greek (Instruction, Examination)
Learning Outcomes
After the successful completion of the course, the students should be able to: 1) Determine the power-speed and torque-speed relationship of various mechanical loads. 2) Calaculate the size and type of the electric motor as a function of the size and type of the mechanical load. Then, they should be able to calculate the size and type of the power-electronics converter as a function of the electric motor characteristics. 3) Calculate the thermal stress of an electric motor under various starting methods or under speed variation conditions. 4) Calculate the electrical parameters of an induction motor when fed from a source of variable voltage magnitude and frequency 5) Design an algorithm based on the field-orientation method for controlling a synchronous motor
General Competences
• Apply knowledge in practice
• Retrieve, analyse and synthesise data and information, with the use of necessary technologies
• Make decisions
• Work in teams
Course Content (Syllabus)
The course deals with the basic principles of a complete electric motion system comprising the mechanical load, the electric motor and the power electronics converter which feeds the electric motor. The following are analyzed: 1) The basic principles of motion with emphasis on the rotational motion. 2) The types of the mechanical loads and the associated power-speed and torque-speed characteristics. 3) The demands imposed on the electromagnetic torque, currents and power losses, by the variation of the rotating speed of the mechanical load. 4) The behavior of induction motors in dynamic operation modes such as the start-up or the speed variation. 5) The ability to change the electromagnetic torque and the speed of an induction motor by changing either the voltage magnitude or voltage magnitude and the frequency at the same time 6) The scalar control of induction motors at speeds that are lower or larger the rated one. 7) The starting of the induction motors and their respective thermal stress with: (1) full voltage, (2) reduced voltage, (3) continuously changing the voltage magnitude, (4) continuously changing the voltage magnitude and frequency 8) The breaking of induction motors and its effect on the power electronics converter 9) Control of synchronous motors with the field-orientation method.
Keywords
rotating motion, starting if electric motors, losses in electric motors, mechanical loads
Educational Material Types
• Notes
• Slide presentations
• Book
Use of Information and Communication Technologies
Use of ICT
• Use of ICT in Communication with Students
Description
The communication with students, for matters concerning the course (announcements, distribution of ppt slides, exams results, other relative web sites, etc) is made via the web site of the course: http://alexander.ee.auth.gr:8083/eTHMMY/loginAction.do;jsessionid=786C14FF31921199A8DDD477DCA2C6BE
Course Organization
Lectures39
Project30
Total69
Student Assessment
Description
1) To each group of 3 students, a project is assigned. The written essay of the project is examined and gets a grade. A period of at least one month is given to each group to carry out the project and write the essay. The essay must be submitted 10 days before the oral examination of the students. 2) The students are examined orally. The final grade of the course is deduced as a combination of 1)and 2) with 2) having the largest weight.
Student Assessment methods
• Written Assignment (Summative)
• Oral Exams (Summative)
Bibliography
Course Bibliography (Eudoxus)
1) Π. Μαλατέστας, "Ηλεκτρική Κίνηση", ISBN: 978-960-418-251-0, ΕΚΔΟΣΕΙΣ Α. ΤΖΙΟΛΑ & ΥΙΟΙ Α.Ε., 18548785 2)R. Krishnan, (μετάφραση Αθ. Καρλής)"Ηλεκτρικά Κινητήρια Συστήματα, Μοντελοποίηση, Ανάλυση και Έλεγχος", ISBN: 978-960-461-233-8, ΕΚΔΟΣΕΙΣ ΚΛΕΙΔΑΡΙΘΜΟΣ ΕΠΕ, 2009 ΘΕΣ/ΝΙΚΗ, Κωδικός στον ΕΥΔΟΞΟ: 13769
Last Update
14-07-2013