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Lecturer(s)
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Nosek Jaroslav, prof. Ing. CSc.
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Krčmář Lukáš, Ing.
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Course content
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<u> Lecture topics: </u> Action members of mechatronic systems. Electric power elements using the properties of magnetic field, electric field and solid state materials. Use. I. Actuators with magnetic field. Actuators with magnetic field. Principles of derivation of sliding and rotational motion. Magnetic circuits of converters. Losses in the magnetic circuit. Electromagnet. Basic static and dynamic properties. Magnetic bearings. Electric motors as actuators and parts of el. drive. Asynchronous motor. Principle and construction arrangement. Rotating magnetic field. Motor with ring armature. Electrical spare circuit. Moment and moment characteristic. Starting AM. AM frequency converter control. Linear induction motor with continuous motion. DC motor. Principle and construction arrangement. DC motor torque and speed. Foreign excited, derivative and series DC motor. Ss motor maxon. Special engines. Linear motion systems. 1f AM. Stepper motors. AC commutator single-phase motor. Principle and construction arrangement. Moment characteristic. Stepper motors. Principle of KM with variable reluctance. Synchronous machines. Principle and construction arrangement. Synchronous alternator, alternator phasing. Alternator in hard network. Synchronous motor with permanent magnets. Starting and speed control of a synchronous motor. Electric drive. Equation of motion, basic states and operating modes. Measurement of deformation effects of mech. voltage using strain gauges. Torque measurement. Measurement of small moss. displacement of action members. Elements and circuits of power electronics. Semiconductor uncontrolled rectifiers powered by single-phase, resp. three-phase current. Thyristor and its application in controlled rectifiers. Triac as an AC regulator. II. Actuators with electric field. III. Actuators using solid phase materials. Intelligent materials. Direct and indirect piezoelectric effect. Application. MEMS. Piezoelectric resonators. <u> Exercise content: </u> Work safety on electrical machines. Basics of el. safety standards for machine construction. Basic parameters of electrical signals. Three-phase network system. Calculations of mean and effective values, energy balance of el. machines and calculations of magnetic circuits el. machines. Safety devices, contactor automation, line diagram, relay circuit design. Measurement of 1f and 3f power inputs of symmetrical and asymmetrical loads. Power factor measurement, principles of compensation. Test 1 (20 min.). Three-phase transformer, operating characteristics, measurement of transformer replacement circuit parameters, measurement of clock angle. DC machine - motor, dynamo, measuring machine characteristics. Asynchronous motor, pie chart, torque characteristic, torque characteristics AM with frequency converter. Single-phase asynchronous motor, single-phase AC commutator motor, measurement of operating characteristics. Synchronous generator, characteristic measurement, phasing, hard network generator. Credit test (20min.). Stepper motors, control unit programming. Credit.
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Learning activities and teaching methods
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Monological explanation (lecture, presentation,briefing), Laboratory work
- Class attendance
- 56 hours per semester
- Preparation for exam
- 44 hours per semester
- Home preparation for classes
- 50 hours per semester
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Learning outcomes
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In the course, students will gain theoretical knowledge and practical skills in the field of electromechanical power converters. Emphasis is placed on transducers using electromagnetic and electrostatic forces, and the properties of intelligent materials. Students will also get acquainted with the basic properties of electrical machines, elements of power electronics and converters.
In this subject, there will be given the both theoretical overview and practical experience in the area of electromechanical power transducers. An accent will be put on transducers using electromagnetic- and electrostatic forces, and properties of the smart materials. Students will acquire the basic concepts of the electrical machines, power electronics and converters too.
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Prerequisites
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Condition of registration: Exam from subjects Physics1,2,3.
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Assessment methods and criteria
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Combined examination, Oral exam, Written exam
Prerequisites and co-requisites: Active participation in all laboratory exercises (in case of 1-2 excused absences, completion of the laboratory diary and solution of assigned examples is required), successfully passed tests, credit, written and oral exam.
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Recommended literature
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Maixner, L. a kol. Mechatronika (Nosek, J., kap.4 - Akční členy mechatronických soustav). Computer Press, Brno, 2006. ISBN 8025112993.
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Nosek, J. Elektrotechnika a průmyslová elektronika. Příklady. TUL, Liberec, 1991.
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Pavelka, J., Čeřovský, Z., Javůrek, J. Elektrické pohony. ČVUT, Praha, 1999.
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Tkotz, K. a kol. Příručka pro elektrotechnika. Europa-Sobotáles, Praha, 2006. ISBN 80-86706-13-3.
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Uhlíř, I. a kol. Elektrotechnika. ČVUT, Praha, 1999.
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Uchino, K. Ferroelectric Devices. Marcel Dekker, Inc., New York, 2000. ISBN 0-8247-8133-3.
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