Course code: 252401 | Subject title: ELECTRIC MACHINES | ||||
Credits: 6 | Type of subject: Mandatory | Year: 2 | Period: 2º S | ||
Department: Ingeniería Eléctrica, Electrónica y de Comunicación | |||||
Lecturers: | |||||
BERRUETA IRIGOYEN, ALBERTO (Resp) [Mentoring ] | BARCIA GONZALEZ, ALBERTO [Mentoring ] |
This Electrical Machines subject is of a theoretical-practical nature, combining classroom-based classes, problem classes, activities and group work, practical sessions and autonomous learning by the student.
The classroom-based classes will consist of the theoretical explanation of the fundamental aspects of each topic, as well as the resolution of doubts and questions raised by the students based on their autonomous learning of each topic. As part of the practical, individual and / or group activities, practical exercises and works related to the topics will be carried out.
To understand the subject and make efficient use of it, it will be necessary for the student to carry out continuous work around the following activities:
MiAulario will be used as a teaching accessory, a tool that allows for a better use of the subject. Through it, the calendar of the different activities of the subject will be indicated, the teaching material will be accessible, and will be used to send work requested to be done in class.
Learning Outcome | Evaluation System | Weight (%) | Can be retaken |
R1, R2, R3, R4, R5, R6, R7 | Long Answer Tests | 80
|
Yes |
R4, R5, R6, R7, R8 | Tests, Reports, Experimental Work | 20
|
No |
The Electrical Machines subject is divided into five topics, the specific contents of which are detailed below:
Topic 0. Introduction to electrical machines.
0.1 Electrical machines in the electrical system: stages of generation, transformation, transport, distribution and use
0.2 Definition of an electric machine
0.3 Classification and types of electrical machines
Topic 1. Fundamentals of electromagnetism and transformers.
1.1 Constitution of electrical machines: electrical and magnetic circuits
1.2 Review of the fundamental laws of electromagnetism that govern the behavior of electrical machines
1.3 Permanent magnets
Topic 2. Fundamentals of rotary electrical machines
2.1 Introduction
2.2 Creation of a magnetic field in the air gap produced by a diametric pitch coil
2.3 Voltage induced in a diametrical pitch coil
2.4 Multipolar machines. Electrical and mechanical reference systems
2.5 Construction techniques to eliminate harmonics and obtain sine waves: Equivalent winding.
2.6 Obtaining rotating and pulsating magnetic fields. Ferraris theorem
2.7 Inductances in a rotary electric machine
2.8 Electromagnetic torque in smooth pole machines
Topic 3. Synchronous machine
3.1 Introduction and generalities. Constructive aspects.
3.2 Operation of the synchronous machine in vacuum and under load. Armature reaction.
3.3 Equivalent circuit of the cylindrical rotor synchronous machine. Vacuum and short circuit tests
3.4 Isolated operation of the synchronous generator.
3.5 Operation of the synchronous generator connected to a large capacity network. Active and reactive power variation
Topic 4. Asynchronous or induction machine
4.1 General and constructive aspects. Asynchronous machine types
4.2 Principle of operation
4.3 Obtaining the equivalent circuit in permanent regime. Simplified equivalent circuit
4.4 Tests to obtain the equivalent circuit
4.5 Balance of powers. Machine performance
4.6 Torque-speed mechanical characteristics. Operating areas
Topic 5. Introduction to electric drives
5.1 Electric drives for constant-speed asynchronous machine: Performance. Starting of induction motors.
5.2 Electric drives for asynchronous machine with variable speed: Rotational slip. Frequency variation. V/f ratio. Frequency converter.
5.3 Electric drives for constant-speed synchronous machine: steady-state torque - speed curve. Problems related to machine starting and transient state.
5.4 Electric drives for synchronous machine with variable speed: permanent-magnet synchronous motor. Brushless DC motor.
The theoretical training will be complemented with hands-on sessions in which the students will work with experimental assemblies on:
- Laboratory 1: Synchronous Generator: equivalent circuit and operation under load.
- Laboratory 2: Asynchronous motor: equivalent circuit.
- Laboratory 3: Asynchronous motor: torque-speed curve.
- Laboratory 4: Starting of asynchronous machines.
- Laboratory 5: Frequency variation in asynchronous machines.
Access the bibliography that your professor has requested from the Library.
Basic Bibliography:
Advanced Bibliography