| Code |
15266
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| Year |
1
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| Semester |
S2
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| ECTS Credits |
6
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| Workload |
PL(15H)/T(30H)/TP(15H)
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| Scientific area |
Electrotechnics and Electronics
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Entry requirements |
Electric circuits
Electric machines
Power electronics
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Mode of delivery |
Face-to-Face.
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Work placements |
Not Applicable.
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Learning outcomes |
This course unit aims to study the main characteristics related to the topology, construction, principle of operation and types of applications of variable speed electric drives.
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Syllabus |
Definition and structure of electric drives.
Typical structure of the power supply for electric drives.
Low voltage and medium voltage power converters.
Dynamics of the mechanical drive system, gearboxes / gears.
Analysis of different types of industrial mechanical loads.
Sizing of a motor for a drive
Torque limiting or derating curves
AC motor speed control strategies.
Scalar control of the induction motor.
Control and operating regions of the induction motor.
Generalized theory of electric machines: machine equations on the abc axes.
dq0 reference frame. Park transform.
Space vector representation.
Vector control by field orientation (FOC).
Elements of vector control, control loops.
Space vector modulation (SVM)
Direct torque control (DTC).
Sensorless control
High speed operation.
Vector control of synchronous motors.
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Main Bibliography |
PClasses slides and presentations.
P. C. Sen: "Principles of Electric Machines and Power Electronics", John Wiley & Sons.
A. E. Fitzgerald, C. Kingsley, A. Kusko: "Electric Machinery", McGraw-Hill.Kim, Sang-Hoon. Electric motor control: DC, AC, and BLDC motors. Elsevier, 2017.
Boldea, Ion, and Syed A. Nasar. Electric drives. CRC press, 2016.
Mohan, Ned. Advanced electric drives: analysis, control, and modeling using MATLAB/Simulink. John wiley & sons, 2014.
Guzinski, Jaroslaw, Haitham Abu-Rub, and Patryk Strankowski. Variable speed AC drives with inverter output filters. John Wiley & Sons, 2015.
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Teaching Methodologies and Assessment Criteria |
At the theoretical classes the course contents are presented through classic methodologies, which can be done by videoconference. The laboratory classrooms are devoted to the conduct of tests and computer model simulations. All need documentation is previously available on Moodle platform.
All students who are present in 75% of all classes and obtained positive grade in the practical component are allowed to do the exam.
Exemption from final examination is subject to obtaining a minimum grade of 10 (ten), in a maximum grade of 20 (twenty) in both the practical component and in the written test. The continuous evaluation grade is assigned according to: NFreq = 0.75xNT +0.25xNP.
The students allowed to do the exam must obtain a minimum grade of 10 (ten), in a maximum grade of 20 (twenty) in the written exam. The final grade is obtained according to: NF = Greatest of {(0.75x NE +0.25xNP);NFreq}.
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Language |
Portuguese. Tutorial support is available in English.
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