Universidad Pública de Navarra - Nafarroako Univertsitate Publikoa

Methodology

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:

• Attend class regularly.
• Carry out reflective reading and a deep study of the material that is provided or indicated in each topic.
• Carry out the exercises and tasks that are proposed throughout the course.
• Participate actively in discussions that arise in class.
• Consultation of doubts arising in the study of the subject in the times set by the teacher for this purpose.

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.

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Languages

English.

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Evaluation

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Agenda

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.

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Experimental practice program

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.

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Bibliography

Access the bibliography that your professor has requested from the Library.

Basic Bibliography: 

• L. Marroyo, P. Sanchis; Apuntes sobre Máquinas Eléctricas; UPNA.
• Jesús Fraile Mora, Máquinas Eléctricas; Colegio de Ingenieros de caminos, canales y puertos, tercera edición, 1995
• J. Sanz Feito; Máquinas Eléctricas; Prentice Hall; 2002.

Advanced Bibliography

• S. J. Chapman; Máquinas Eléctricas; McGraw Hill; segunda edición (1993).
• A. E. Fitzgeralda, Jr Charles Kingsley, Stephen D. Umans; Máquinas Eléctricas; McGraw-Hill, 1992.
• Jean Chatelain; Machines Électriques; Traité d'Électricité; Presses Polytechniques Romandes, 1989.
• P. C. Sen; Principles Of Electric Machines And Power Electronics; John Wiley & Sons; 1997.
• Manual teórico práctico instalaciones eléctricas en baja tensión, Schneider Electric.

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