Courses

Electrical Machines and Motor Drive Systems ΙΙ

General

Course Contents

1. Introduction to synchronous machines: operating principles, construction, applications
2. Synchronous generators: equivalent circuit, torque and power calculations
3. Voltage and frequency control of synchronous generators, parallel operation
4. Transient conditions in synchronous generators
5. Synchronous motor and its driving: equivalent circuit and steady state operation
6. Start-up of synchronous motors, applications in reactive power compensation
7. Single phase motors: creation of a magnetic field and start-up
8. Single phase motors: equivalent circuit, speed control
9. Other type of motors and drive systems: switched reluctance motors
10. Other type of motors and drive systems: step motors
11. Permanent magnet machines (PMSM, brushless DC) and drive systems: construction and operation
12. Permanent magnet machines: equivalent circuits and applications
13. Drive systems for permanent magnet motors.

Educational Goals

The course represents a continuation of the Electrical Machines and Motor Drives I course, aiming to expand on the study of motor introduction and their use, along with motor drive systems, in industrial applications. Therefore, the course emphasizes on further issues that involve the production of electrical energy at a large scale using synchronous generators, as well as on electric motion using synchronous motors, single phase motors, step motors, switched reluctance and permanent magnet motors. In the beginning, basic principles of these electrical machines are presented (voltage production for generators and torque production for motors), followed by the analysis of modern control methods by use of respective motor drives.
As a selective course it provides valuable experience and technical know-how to the new industrial and management engineer as regards the area of electric motion which corresponds to a founding stone of industry, owing to the vast plethora of electrical machines and motor drives applications.
The consistent and successful completion of the course, has the expected outcome to enable the student to:
a) understand the importance of electrical machines applications in various industrial processes
b) know about the current technological developments as regards electrical machines and motor drives for precise and efficient control
c) know about indicative uses and application examples so that he/she can proceed to specification requirements drafting.
d) be in a position to understand the nature of problems that can arise from the operation of electrical machines.
e) assess basic technoeconomic data and application results of electrical machines.

General Skills

Practical application of knowledge, search, analysis and synthesis of information and data using appropriate technologies; Adjustment to new situations; Decision making; Autonomous work; Team work; Work in an interdisciplinary environment. Design and project management; promotion of free, creative and inductive thinking; priorities setting; production of new research ideas; compliance to guidelines of good practices.

Teaching Methods

Class theory, teaching in discussion groups and students’ active participation. The lectures are supported by presentations of the total content, while the whiteboard is used: a) for further elaboration of selected thematic sections, b) for the promotion of the students’ active participation in step-by-step problems solving and examples process.

Students Evaluation

The course grade is formulated by a final written exam which may contain: multiple choice questions, problems solving based on knowledge acquired, short answers’ questions, comparative assessment of theoretical principles.

Recommended Bibliography

1. Chapman S., «Electric Machinery Fundamentals», 5th Edition, ISBN-13: 978-0073529547, McGraw Hill
2. Fitzgerald, Kinglsey, Umans, “Electric Machinery”, 6th Edition, ISBN-13: 978-0071230100, McGraw Hill
3. Mohan N., Undeland T and Robbins W, “Power Electronics: Converters, Applications and Design”, ISBN-13: 978-0471226932, John Wiley & Sons Inc.