Course detail

# Electric Drive Systems 1

Definition and mutual mathematical relations between quantities in electromagnetism, Amper´s law, Faraday´s induction law, Hopkinson´s law. Magnetic materials used in electric motors. Basic principles of the electro-magnetic conversion relevant for all motor types. DC motor with separate excitation, DC motor with permanent magnets, three-phase permanent magnet synchronous motor with harmonic supply currents and harmonic induced voltages (PMSM),  three-phase permanent magnet synchronous motor with rectangular supply currents and rectangular induced voltages (BLDC), squirrel cage induction motor (IM), switched reluctance motor and synchronous reluctance motor (SRM).

Language of instruction

English

Number of ECTS credits

5

Mode of study

Not applicable.

Entry knowledge

Knowledge of high school mathematics and university mathematics of the bachelor degree, good understanding of the geometrical interpretation of derivation, infinite integral and finite integral.

Rules for evaluation and completion of the course

Evaluation of numerical exercises - max. 30 points. Final oral exam - max. 70 points.
Numerical exercises are obligatory.

Aims

Understanding basic problems and issues of electromagnetism. Understanding the principles of operation and basic physical and mathematical consequences applicable for a property analysis of various motor types used in electric vehicles. Practical mutual comparison of these motors using the mentioned physical and mathematical consequences.

1. Student can understand the basic quantities of electromagnetism, he knows their mutual mathematical relations.
2. Student knows magnetic materials used in electric motors, he understands their technical parameters and  their influence on the machine properties.
3. Student can understand the relations between energy, instantaneous power, true (average) power, further the relation between mechanical power, speed and torque and relation between electrical power, voltage and current.
4. Student can understand basic consequences of the electro-mechanical conversion.
5. Student can understand the construction and principle of operation of a DC motor, he can explain mathematically its torque-speed characteristics (separate excitation or excitation with permanent magnets). He can understand its advantages and disadvantages regarding the efficiency map.
6. Student can understand the construction and principle of operation of an induction motor, he can obtain mathematically its torque dependence on slip frequency. He understands substantial physical consequences influencing the motor properties. Student can understand the basic principles of the motor control, he knows the problems of losses and he can understand the motor efficiency map.
7. Student can understand synchronous motors with permanent magnets (PMSM and BLDC), he can understand the consequences important for the motor design and properties influencing. Student can understand the efficiency map.
8. Student can understand the reluctance motors, he knows the limitations due to the winding inductance, he can explain advantages and disadvantages of reluctance machines.
9. Student can compare mutual advantages and disadvantages, efficiency maps and further user parameters of the above mentioned motor types. He can also understand the reasons for these facts.

Study aids

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

FIitzgerald, A. E., Kingsley, C., Umans, S. D. Electric Machinery. 6th edition. McGraw-Hill, 2002. 704 p. ISBN 978-0073660097 (EN)
Pyrhonen J., Jokinen T., Hrabovcova V.: Design of Rotating Electrical Machines, 2nd edition, Wiley, 2013. ISBN: 978-1118581575 (EN)
Hendershot, J. R. Jr., Miller, T.J.E.: Design of Brushless Permanent-Magnet Machines. Motor Design Books LLC; Second Edition, 2010. ISBN 978-0984068708 (EN)

Not applicable.

Classification of course in study plans

• Programme MPA-AEE Master's, 1. year of study, summer semester, compulsory

#### Type of course unit

Lecture

26 hours, optionally

Teacher / Lecturer

Fundamentals seminar

26 hours, compulsory

Teacher / Lecturer