Electrical Drives and Electrical Machines Dynamics (ETF EEO EPDM 4770)

General information

Module title

Electrical Drives and Electrical Machines Dynamics

Module code

ETF EEO EPDM 4770

Study

ETF-B

Department

Electric Power Engineering

Year

1

Semester

1

Module type

Mandatory

ECTS

7

Hours

70

Lectures

39

Exercises

15

Tutorials

16

Module goal - Knowledge and skill to be achieved by students
  The goal of this course is to present students with systems operated by DC and AC motors in static and dynamic states and their application in different types of electrical drive systems and mechatronics systems in industry, robotics, servo drives and electrical vehicles.

Syllabus
  General remarks; rotational systems dynamics; periodic load and nominal power; mechanical characteristics of the working mechanisms; quasi-stationary regimes in the 4-quadrant speed/momentum diagram with the power flows in the operating and braking conditions; general properties of automatically-controlled electrical drives.
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Systems operated with DC engines; DC engine in quasi-steady operating conditions; power and voltage control in the 4-quadrant regimes; analysis of transient states of independent activated DC engine; speed regulation with feedback; role of the inner loop; DC drives supplied with energy from electronic devices - chopper, thyristor and transistor devices.
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Systems operated by AC engines; three-phase asynchronous engine in the quasi-steady operating conditions; asynchronous engine control with voltage and frequency converter; characteristics of engine with a constant voltage/frequency ratio, constant voltage and variable frequency; constant torque and constant power regimes; power-controlled PWM inverter system with pulse-width modulation (PWM) for three-phase asynchronous engine; control of sliding-ring asynchronous engine with a recuperation of a sliding energy; three-phase synchronous engines and generators in quasi-steady and dynamic operating conditions; synchronous machines with nonlinear dynamic regimes; stability analysis; variable frequency synchronous engines control; synchronous engines with variable voltage and variable frequency.
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Literature
Recommended
Additional

Didactic methods
  Course lessons are taught by the professor in lecture halls. These lectures include teaching and solving practical examples and mathematical problems presented by the professor (10 hours). In addition to this form of lecturing, there are two more:
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1. Tutorials, (16 hours) in which students under tutor's guidance and supervision, solve mathematical problems related to electrical devices using MATLAB-Simulink software.
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2. Laboratory practices (15 hours) which include practical analysis of how electrical drives function.
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Exams
  During the course students earn points according to the following system:
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- Attending classes and tutorials: 10 points, student with more than three absences from lectures and/or tutorials cannot get these points.
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- Home assignments, laboratory reports and/or seminary thesis: maximum of 10 points,
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- Partial exams: two partial exams; each positively evaluated partial exam (more than 10 points) to maximum 20 points.
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During the time of each partial exam (90 minutes) students will solve simple questions with goal of testing whether student has basic theoretical knowledge, multiple choice problems, as well as one open-answer problem. Students who gained less than 20 points during the semester must repeat that course.
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Students who earned 40 or more points during the semester will take a final exam; the exam consists of discussion of problems from partial exams, home assignments and answers to simple questions related to course topics.
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Final oral exam provides maximum of 40 points. In order to get positive final grade, students must earn minimum of 20 points in this exam. Student failing to earn the minimum must take the makeup oral exam.
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Student, who earned 20 or more, and less than 40 points during the semester, will have to take the makeup exam. The makeup exam is organized in the following manner:
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- Written part structured similarly to partial written exam, during which students solve problems in topics they failed on partial exams (less than 10 points);
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- Oral part structured the same as the oral part of the final exam.
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Aditional notes