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Lecturer(s)
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Lettl Jiří, prof. Ing. CSc.
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Course content
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Motion equation, mechanical system solution methods, load types, load torque, motor torque. Dynamic torque, operational situations analysis, steady states. Electromechanical transient states, stability, losses in electric drives. Dimensioning of drives for changing load, more-quadrants operation. Classification of converters for electric drives, their principles, characteristics. Electric drives with DC separately excited motors, reversible drives. Electric drives with DC serious excited motors, traction applications. Electric drives with induction motors, mathematical models, start, softstart, braking. Induction motor drives speed control, block diagrams of speed control. Principles of induction motor vector and direct torque control, electric shaft. Electric drives with synchronous motors, excitation sources, start. Speed control of synchronous motors, drives with cycloconverters. Drives with stepping motors, switch reluctance motors. Projection of electric drives, survey of electric drives application in engineering practice.
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Learning activities and teaching methods
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Monologic (reading, lecture, briefing)
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Learning outcomes
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The aim of the course is to clarify problems of mechanical system solution methods, load types, torque types, operational situations analysis, electromechanical transient states, stability, losses, dimensioning and projection of electric drives, electric drives with DC motors, electric drives with induction motors, electric drives with synchronous motors, drives with stepping motors, switch reluctance motors - always with emphasis on principles, mathematical models, speed control, braking, block diagrams of control, principles of induction motor vector and direct torque control, traction applications.
On the course completion the students are able to implement various types of semiconductor converters and electric machines, to perform their projection and dimensioning, to handle various types of electric drives such as electric drives with DC separately excited motors, electric drives with DC serious excited motors, electric drives with induction motors, electric drives with synchronous motors, to apply proper control methods in case of start, speed control, and braking, to take advantage of knowledge of electric drives application in engineering practice.
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Prerequisites
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Knowledge of electrical circuit, digital technique, basics of electrical drives, theory of controlling, power electronics and electrical machines is expected.
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Assessment methods and criteria
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Oral examination
Knowledge of electric machines and power electronics.
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Recommended literature
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Crowder Richard. Electric Drives and Electromechanical systems. Elsevier, Oxford, 2006.
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Leonhard Werner. Control of Electric Drives.. Springer-Verlag, New York, 2001.
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Sen P. C. Principles of Electric Machines and Power Electronics. John Wiley & Sons, New York, 1997.
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