3147.19 - Electrical Circuits

3147.19

Electrical Circuits

7.5

3117 Introduction to Electrical Engineering

To enable students to understand basic electrical circuits, understand basic components in electrical circuits, ant to understand basic calculations in electrical power transfer.

Time varying voltages and currents. Stationary and non-stationary voltages and currents. Phasors and complex number calculation. Three phase systems. Frequency response and filters. Fourier coefficients for non-sinusoidal voltages and currents. Fundamental and harmonics. Basic digital electronics. Semiconductors: Diodes, FETs and BJTs. Amplifiers and operational amplifiers.

Lectures, group work, problem solving and laboratory projects with reports.

After the course the student shall be able to: - Describe the connection between electrical current and voltage in L and C circuits. Calculate currents and voltages in RC and RL circuits. - Calculate step response of RC and RL circuits of first and second order. - Calculate the stationary AC-solution to circuits with R, L, and C, including series and parallel combinations. Use phasors and complex calculations. - Analyze more complex combinations of R, L, and C than series and parallel - Calculate three phase circuits. - Calculate currents and active, reactive, and apparent power in one phase and three phase circuits with sinusoidal voltages and currents. - Calculate currents and active and apparent power in one phase and three phase circuits with non-sinusoidal voltages and currents. - Make basic calculations on power transfer systems, i.e. voltage loss and power loss. - Describe diode models: The ideal diode, piecewise linear models. - Describe rectifier circuits and the ratio between AC and DC currents. - Describe how IGFET and BJT work. Use large signal models for transistor circuits.

- Project reports with oral presentation - Written examination during the exam week

External

7-

Allan R. Hambley: Electrical Engineering, Principles and Applications; 6th edition Supplerandi tilfar: a) T. Wildi: Electrical Machines, Drives, and Power Systems, Ch. 30: Harmonics b) N. Mohan, T.M. Undeland & W.P. Robbins: Power Electronics, Ch. 3.1 & 3.2 c) B. Joensen: Spenningsfall

Benadikt Joensen