Academic management

This course pertains to the module "Common to Industrial Branch" and to the subject "Electricity, Electronics and Automation".

This course is shared by the Degrees in Electrical Engineering, in Industrial Electronics and Automation Engineering, in Mechanical Engineering, in Industrial Chemistry Engineering and in Industrial Organization Engineering from the University of Oviedo. The contents of the course are essential for the development of the rest of the modules and subjects of the aforementioned degrees due to its basic nature.

Students will develop their ability to identify and analyze electric circuits and machines, thus being able to transfer and apply the acquired knowledge to face successfully any problems that may arise during their training and education.

Students will need the knowledge of the mathematical and physical concepts studied in the first year of their respective degrees to be able to successfully follow the course.

Competences: 

• CG3: Knowledge of basic and technological subjects to learn new methods and theories and acquire versatility to adapt to new situations.
• CG4: Ability to solve problems on their own iniciative, taking decisions, creativity, and critical awareness.
• CG14: Honesty, responsibility, ethical commitment, and solidarity.
• CG15: Teamwork.
• CC4: Knowledge and application of the theoretical principles of electric circuits and machines.

Learning outcomes: 

• R1: Identify and analyze the components of electirc circuits and utilize the corresponding analysis techniques.
• R2: Utilize the analysis techniques for electric circuits fed from sinusoidal sources.
• R3: Identify, analyze, and calculate three-phase balanced circuits and industrial electric installations.
• R4: Utilize measurement procedures and devices in electric circuits.
• R5: Describe and analyze the operating principles of electric machines and their applications.

I. FUNDAMENTALS OF ELECTRICAL CIRCUITS: DC CIRCUITS

• Fundamental electric magnitudes and units
  • Electric charges, intensity of electric current, electric charge, electric voltage between two points and electromotive forcé, electric power, electric energy; multiples and fractions
• Sign and graphic agreements
  • Electric charge, intensity of electric current, electric voltage between two points and electromotive force, power and electric energy (active and passive agreements)
• Fundamentals of electric circuits
  • Definition of electric circuit
  • Introduction to active and passive components of electric circuits
  • Fundamental topological entities of electric circuits: branch, node, loop, graph, plain circuit, mesh
  • Kirchhoff’s laws
  • Connection of components in series and in parallel
• Waveforms in electric circuits
  • Steady and transient states
  • Bidirectional and unidirectional waveforms
  • Periodical waveforms: period, cycle, frequency, delay, peak values, peak to peak value, mean value, rms value
• Components of electric circuits
  • Ideal passive components: resistance (Ohm’s Law, resistance (R), conductance, short-circuit, open circuit, ideal switch, resistance of a conductor, resistivity and conductivity, instantaneous dissipated power, dissipated energy and Joule’s effect, real resistors, color code)
  • Ideal passive components: inductance (v-i equation, self-inductance (L), charged inductance, absorbed instantaneous power, stored energy, real inductors)
  • Ideal passive components: coupled inductors
  • Ideal passive components: capacitance (v-i equation, capacitance (C), charged capacitance, absorbed instantaneous power, stored energy, real capacitors)
  • Associations and equivalences of ideal passive components: operational impedance and admittance (Ohm’s Law generalization), series association, parallel association, Kennelly’s Theorem
  • Ideal active components: ideal voltage sources, ideal current sources, series and parallel associations of ideal voltage and current sources, ideal controlled sources
  • Real active components: real voltage sources, real current sources, Maximum power transfer Theorem, equivalence between real voltage and current sources
  • Measurement devices: ideal voltmeters and ammeters

II. CIRCUITS IN SINUSOIDAL STEADY STATE

• Sinusoidal waveforms: relevance, amplitude, angular frequency, phase angle, initial phase angle, particularization of parameters of periodical waveforms
• Sinusoidal waveforms in the complex domain: phasors
• Complex impedance and admittance: generalization of the Ohm’s Law in complex notation
• Systematic analysis of sinusoidal circuits in steady state in the complex domain
• Response of dipoles R, L, C, RL and RC series in sinusoidal steady state: phasor diagram
• Power and energy in sinusoidal steady state
  • Active, reactive and apparent power
  • Instantaneous power and energy, and active, reactive and apparent power in dipoles R, L, C, RL and RC series
  • Complex power
  • Power triangle
  • Boucherot’s Theorem
  • Power factor: concept, relevance and correction
• Introduction to the frequency response of sinusoidal circuits in steady state: series and parallel resonance

III. TOPOLOGICAL METHODS AND THEOREMS

• Resolution of electric circuits by means of the Mesh Current Method
• Resolution of electric circuits by means of the Node Voltage Method
  • Millman’s Theorem
• Superposition Theorem
• Thévenin’s Theorem
  • Generalization of the Maximum power transfer Theorem
• Norton’s Theorem

IV. THREE-PHASE CIRCUITS

• Generalities
  • Balanced and unbalanced three-phase voltage systems
  • Phase sequence
  • Balanced and unbalanced three-phase loads and current systems
• Three-phase topologies
  • Four-wire star-star
    • Live and neutral conductors
  • Three-wire star-star
  • Three-phase circuits with connections in delta
• Line (line-to-line) and phase magnitudes
• Equivalences star-delta and delta-star
• Resolution of three-phase balanced circuits
  • Single-phase equivalent circuit
• Power in three-phase circuits
  • Instantaneous power in three-phase elements
  • Active, reactive and apparent power in three-phase elements
  • Power triangle, complex power, Boucherot’s Theorem, power factor
  • Power factor correction in three-phase installations
• Introduction to the generation, transport and distribution of electric energy

V. ELECTRIC MACHINES

• Introduction to transfomers
• Introduction to asyncronous machines
• Introduction to synchronous machines

LABORATORY SESSIONS 

• P1: Description of equipment and assembly of DC circuits
• P2: Assembly of sinusoidal circuits in steady state I
• P3: Assembly of sinusoidal circuits in steady state II
• P4: Exam

Planning:

Presential work (total: 58 H)

• Block I: Lectures: 8 H  Class practice or seminars: 3 H
• Block II Lectures: 10 H  Class practice or seminars: 4 H
• Block III: Lectures: 6 H  Class practice or seminars: 3 H
• Blocks IV and V: Lectures: 11 H  Class practice or seminars: 4 H
• Laboratory sessions: 7 H
  • P1: 2 H.
  • P2: 2 H.
  • P3: 2 H.
  • P4: 1 H (exam).
• Group tutorial sessions: 2 H

Non-presential work (total: 92 H)

• Block I: Theory study and problem resolution: 20 H
• Block II: Theory study and problem resolution: 24 H
• Block III: Theory study and problem resolution: 18 H
• Blocks IV and V: Theory study and problem resolution: 24 H
• Laboratory sessions study: 6 H

Exceptionally, online teaching activities may be included according to health requirements, in which case students will be duly informed.

ORDINARY CALL

It is carried out by means of continuous evaluation formed by three items:

• Partial exam (maximum of 4/10 points) that will take place approximately in the middle of the term and will include problems related to the contents of the CEXs and PAs seen until then. This exam will have an eliminatory character in terms of its contents for the final exam as long as the student obtains at least 20% of the maximum grade of each problem and 50% of the overall grade of the partial exam.
• Laboratory exam (maximum of 1.5/10 points) that will take place in the fourth PL session and that will include problems related to the contents of the first three PL sessions. In this case it is not required to obtain a minimum grade either in the exercises or in the exam itself. Attendance at the PL sessions is not compulsory.
• Final exam (maximum of 4.5/10 or 8.5/10 points) that will take place on the date of the ordinary call and that will include problems related to the contents of the CEXs and PAs seen throughout the course. Three cases may occur:
  1. Students who have fulfilled the conditions required in the partial exam to eliminate contents will be able to take only the corresponding part of the final exam (maximum of 4.5/10 points).
  2. Students who have fulfilled the conditions required in the partial exam to eliminate contents may take the whole final exam (maximum of 8.5/10 points) in order to improve their grade, in which case the grade obtained in the partial exam will not be taken into account.
  3. Students who have not fulfilled the conditions required in the partial exam to eliminate contents will have to take the whole final exam (maximum of 8.5/10 points).

In any of the three cases, students must obtain at least 20% of the maximum grade of each problem and 50% of the overall grade of the final exam to pass it.

The final grade will be the sum of those obtained in the partial exam, in the laboratory exam and in the final exam (case 1) or the sum of those obtained in the laboratory exam and in the final exam (cases 2 and 3). In any of the three cases, the course will be considered to be passed if the final grade is at least 5 points.

If any of the established minimums is not reached, the maximum final grade will be 3.5 points.

EXTRAORDINARY EXAMS

They are carried out by means of two items:

• Grade obtained (maximum of 1.5/10 points) in the laboratory exam already taken in the fourth PL session.
• Final exam (maximum of 8.5/10 points) that will take place on the date of the corresponding extraordinary call and that will include problems related to the contents of the CEXs and PAs seen throughout the course. The student must obtain at least 20% of the maximum grade of each exercise and 50% of the overall grade of the final exam to pass it.

The final grade will be the sum of the grade that had been obtained in the laboratory exam and that of the final exam. The course will be considered to be passed if the final grade is at least 5 points.

If any of the established minimums is not reached, the maximum final grade will be 3.5 points.

DIFFERENTIATED ASSESSMENT

The same criteria and conditions of the extraordinary calls are applied.

Exceptionally, if health conditions so require, non-attendance evaluation methods may be included. In this case, students will be duly informed.

Resources:

• Classrooms for theoretical lectures equipped with a computer and a projector.
• Classrooms equipped with computers for laboratory sessions and seminars.
• Theory notes and proposed problems.

Basic bibliography:

• ALEXANDER, C and SADIKU, M. Fundamentos de Circuitos Eléctricos. Mc Graw Hill. Third Edition. 2004. ISBN:  970105606X
• FRAILE MORA, JESÚS. Circuitos Eléctricos. Pearson. 2012. ISBN: 9788483227954
• GÓMEZ EXPÓSITO, Antonio. Fundamentos de Teoría de Circuitos. Thomson. 207. ISBN:9788497324175