DC and AC Circuit TheoryLaajuus (5 ECTS)

Objective

After completing the course the student is familiar with basic laws concerning electric circuits and can apply them to analyze simple DC circuits and steady-state AC circuits.

Content

1. Basic quantities and units of electrical engineering.
2. Ohm’s law and Kirchhoff’s circuit laws.
3. Elements of electric circuits. Resistors, voltage- and current sources.
4. Series and parallel circuits.
5. Thévenin’s theorem and Norton’s theorem.
6. Source transformations.
7. Controlled sources.
8. Voltage and current division rules.
9. Nodal voltage analysis and superposition principle.
10. Sinusoidal voltage and current.
11. Inductors and capacitors.
12. Analyzing steady-state linear circuits with phasors.
13. Power in AC circuits.
14. Reactive power compensation and impedance matching.
15. Symmetrical 3-phase networks.
16. Transfer functions.

Qualifications

Basic algebra: manipulation of expressions and equations and solving pairs and sets of equations. Basic knowledge of complex numbers is recommended.

Assessment criteria, satisfactory (1)

1. The student is familiar with basic quantities and units of electrical engineering.
2. The student can apply Kirchhoff’s and Ohm’s laws to analyze very simple circuits.
3. The student understands difference between serial and parallel connections.
4. The student understands the concept of sinusoidal voltage and current, and its behavior in different components.

Assessment criteria, good (3)

1. The student can analyze circuits with multiple nodes with nodal voltage analysis and superposition principle.
2. The student can use source transformations and Thévenin’s and Norton’s theorems to reduce circuits.
3. The student can analyze circuits with controlled sources.
4. The student can apply phasor calculus to analyze AC circuits.

Assessment criteria, excellent (5)

1. The student remembers almost the whole content of the course and can use it to analyze circuits so that the student can tell without any calculations how adding or removing a component or changing its value will change the behavior of the circuit.
2. The student understands deeply the limitations of different analysis methods.
3. The student understands the mathematical basis of phasor calculus and can apply it to complex electric circuits.
4. The student understands the importance of reactive power compensation and impedance matching in practical applications.