Electrical Circuit Analysis in Simulink

Abstract

Simulink is a widely used simulation platform for electrical circuit analysis all over the world. It has numerous electrical blocks to design even the most advanced electrical circuit for simulation. In this concise chapter, the main objective is to demonstrate to the reader how to design any electrical circuit, and how to measure the different parameters via simulation to analyze any circuit. The chapter initiates with a basic overview regarding the measurement of some basic parameters of every electrical circuit, such as voltage, current, and power. The parameter measurements for both DC and AC circuits are demonstrated separately for better comprehensibility. Later, the chapter introduces RLC circuit simulation in the Simulink platform considering both DC and AC sources as well. The contents of this chapter will be helpful for the readers who are interested in getting practical insights on basic electrical circuit analysis.

Exercise 15

• 1. Mention some of the parameters of the electrical circuit.

• 2. (a) Write some of the differences between DC and AC circuits.

  (b) Consider a series RLC circuit with resistance, R = 10 Ω; inductance, L = 0.5 H; and capacitance, C = 0.4 μF, with an AC voltage source. The amplitude of the AC voltage source, V = 120 V; and the frequency = 60 Hz. Determine the following parameters:

    (i) RMS voltage across the resistance

    (ii) Peak-to-peak voltage across the resistance

    (iii) Average voltage across the resistance

• 3. (a) What is an RLC circuit?

  (b) Recreate the following Simulink model by using the same parameters:

(c) Demonstrate the real and reactive power across the resistance of Fig. 15.14 using a Scope block.

• 4. (a) What is the power factor?

  (b) Design a Simulink model for the following circuit, and measure the RMS current (I1) through the inductor, L.

Fig. 15.14

Simulink diagram of a series RLC AC circuit for Question 3b

(c) Simulate the model of Fig. 15.15 to determine the power factor of the source.

Fig. 15.15

An RLC AC circuit for Question 4b