2023
Electrical Theory
Name: Electrical Theory
Code: EME13010L
6 ECTS
Duration: 15 weeks/156 hours
Scientific Area:
Electrotechnical Engineering
Teaching languages: Portuguese
Languages of tutoring support: Portuguese
Regime de Frequência: Presencial
Sustainable Development Goals
Learning Goals
To obtain basic skills in analysis and conception of direct and alternate current electric circuits. Understand the working principles of magnetic circuits. To know the basic principles of an electric motor/generator. To know how single phase and three- phase electric energy is generated. To understand the underlying importance of Maxwells equations in the operation of electromechanical devices.
Contents
1. Introduction
Applications of Maxwells equations.
2. Stationary Electric Current
Ohms law. Electrical energy sources. Joules law.
Direct current circuit analysis. Kirchhoffs laws. Circuit analysis theorems.
3. Magnetostatics
Magnetic circuits analysis using Maxwell equations.
4. Varying Electromagnetic Field
Applications of Faradays law: ideal transformer, electrical generator and motor.
5. Quasi Steady State Circuits
Sinusoidal voltages and currents; complex representation.
Analysis of alternating current circuits. Kirchhoffs law. Circuit analysis theorems.
Active, Reactive and Apparent Power.
Dynamic behavior of electric circuits.
6. Three-Phase Systems
Star and Triangle connections. Transformations. Circuit analysis with different loads. Unbalanced loads.
Applications of Maxwells equations.
2. Stationary Electric Current
Ohms law. Electrical energy sources. Joules law.
Direct current circuit analysis. Kirchhoffs laws. Circuit analysis theorems.
3. Magnetostatics
Magnetic circuits analysis using Maxwell equations.
4. Varying Electromagnetic Field
Applications of Faradays law: ideal transformer, electrical generator and motor.
5. Quasi Steady State Circuits
Sinusoidal voltages and currents; complex representation.
Analysis of alternating current circuits. Kirchhoffs law. Circuit analysis theorems.
Active, Reactive and Apparent Power.
Dynamic behavior of electric circuits.
6. Three-Phase Systems
Star and Triangle connections. Transformations. Circuit analysis with different loads. Unbalanced loads.
Teaching Methods
The teaching method is based on theoretical and practical classes with emphasis on electromagnetic problem solving. The student should understand Maxwells laws from a practical point of view.
Student tutoring available outside the class, 2 times per week in slots of 2 hours each. Email or Zoom available for basic questions or for rescheduling the tutoring timetable in order to suit each student.
Student tutoring available outside the class, 2 times per week in slots of 2 hours each. Email or Zoom available for basic questions or for rescheduling the tutoring timetable in order to suit each student.
Assessment
Assessment elements are classified using the range [0,20].
The Assessment elements are as follows:
• [F1] Test 1 - Minimum grade of 8.0 (50%)
• [F2] Test 2 - Minimum grade of 8.0 (50%)
• [Ex] Final exam (100%)
The student can choose 1 of 2 possible Assessment regimes, in which the Final Grade [NF] is calculated as follows:
i) CONTINUOUS EVALUATION: NF = (F1 + F2)/2
Approved if NF>= 9.5
Failed if NF < 9.5
ii) FINAL ASSESSMENT: NF = Ex
Approved if NF>= 9.5
Failed if NF < 9.5
The Assessment elements are as follows:
• [F1] Test 1 - Minimum grade of 8.0 (50%)
• [F2] Test 2 - Minimum grade of 8.0 (50%)
• [Ex] Final exam (100%)
The student can choose 1 of 2 possible Assessment regimes, in which the Final Grade [NF] is calculated as follows:
i) CONTINUOUS EVALUATION: NF = (F1 + F2)/2
Approved if NF>= 9.5
Failed if NF < 9.5
ii) FINAL ASSESSMENT: NF = Ex
Approved if NF>= 9.5
Failed if NF < 9.5
Teaching Staff
- Fernando Manuel Tim Tim Janeiro [responsible]
