AC bridges are used for measurement of inductances and capacitances. All AC bridge circuits are based on Wheatstone bridge. Figure 1(a) shows the circuit of a simple capacitance bridge. Cs is a precise standard capacitor, Cx is an unknown capacitance, and Q and P are standard resistors, one or both …

Read More »## Single Phase Voltage Calculation | Matlab

Here, we will find phase voltages VAN, VBN, and VCN, shown in the following figure, using Matlab. By applying KVL, we come up with the following three equations: $\begin{matrix} 110\angle {{0}^{o}}=(1+j1){{I}_{1}}+(5+j12){{I}_{1}} & \cdots & (1) \\ 110\angle -{{120}^{o}}=(1-j2){{I}_{2}}+(3+j4){{I}_{2}} & \cdots & (2) \\ 110\angle {{120}^{o}}=(1-j0.5){{I}_{3}}+(5-j12){{I}_{3}} & \cdots & (3) \\\end{matrix}$ …

Read More »## RL Circuit Charging Discharging | Matlab

In this tutorial, we will see an inductor current behavior in an RL Circuit using Matlab. For the simplified RL circuit demonstrated below, an electric current flowing through an inductor is zero initially. At t = 0, the switch actuated from location a to b, where it stayed for 1 …

Read More »## Time Constant of RC Circuit | Matlab

In this tutorial, we will draw capacitor voltage for different time constants and analyze how it affects the charging time. Let’s assume we have a capacitor of $10\mu F$ capacitance and want to draw voltage across capacitor if: $\begin{align} & (a)R=1k\Omega \\ & (b)R=10k\Omega \\ & (c)R=0.11k\Omega \\\end{align}$ We will use the …

Read More »## Average Power RMS Voltage RMS Current Power Factor Calculation using Matlab

In this tutorial, we will calculate average power, RMS Voltage, RMS Current as well as power factor using Matlab. Let’s say we have following values of voltage and current: $\begin{align} & v(t)=10\cos (120\pi t+{{30}^{o}}) \\ & and \\ & i(t)=6\cos (120\pi t+{{60}^{o}}) \\\end{align}$ We use the following formula to calculate the RMS …

Read More »## Nodal Analysis using Matlab | Nodal Analysis using Matrices

In this tutorial, we will find node voltages for a very simple resistive circuit using Nodal Analysis. While applying KCL, we will assume that currents leaving the node are positive and entering the node are negative. Keeping that fact in mind, let’s write node voltages for each node in the …

Read More »## Mesh Analysis using Matlab | Loop Analysis using Matlab

In this tutorial, we will find current which is flowing through resistor RB and the power supplied by the voltage source of 10V. First, let’s assign currents for each loop as I1, I2 and I3 and the power supplied by the source is 10*I1 as we can see from the …

Read More »## Inverse Laplace Transform of a Transfer Function Using Matlab

In this topic, we will find out how to calculate inverse Laplace of a transfer function using Matlab. Let’s find out Inverse Laplace of the following function \[X(s)\frac{10{{s}^{2}}+20s+40}{{{s}^{3}}+12{{s}^{2}}+47s+60}=\frac{Numerator}{Denumerator}\] Let’s write a little code in Matlab now: Results: Here, we get the following results: Residue = 95.0000 -120.0000 35.0000 …

Read More »## Fourier series of a Square Wave using Matlab

In this tutorial, we will write Fourier series of a simple function using Matlab. Let’s assume we have a square wave with following characteristics: $\begin{align} & Period=2ms \\ & Peak-to-Peak\text{ }Value=2\text{ }V \\ & Average\text{ }Value=0\text{ }V \\\end{align}$ So, we can express it as: \[\begin{align} & x(t)=\frac{4}{\pi }\sum\limits_{n=1}^{\infty }{\frac{1}{(2n-1)}\sin \left[ (2n-1)2\pi {{f}_{o}}t …

Read More »## Diode Characteristic Curve Calculation at Different Temperatures using Matlab

In this article, we will draw characteristic curves of a diode at different temperatures. From the following equation, it is evident that the thermal voltage and the reverse saturation current of a diode depend on the temperature. $i={{I}_{s}}\left[ {{e}^{\left( {}^{v}/{}_{n{{V}_{T}}} \right)}}-1 \right]\text{ }\cdots \text{ (1)}$ IS is reverse saturation current …

Read More »## Ladder Diagram | Schematic Diagram | Wiring Diagram

Wiring Diagram Definition Wiring diagrams tend to show a close representation of the interior position of electrical components in a control cabinet and/or circuit. Sometimes wire diagrams can closely represent a picture. The only difference is components are represented by electrical symbols whether they are NEMA standard or IEC standard …

Read More »## Electrical Symbols | Electrical Drawing Symbols

A symbol is a simple graphical representation of some type of component, device, and load that can be drawn easily on a two-dimensional scale. On electrical or electronic diagrams, symbols are used to represent electrical components. Electrical symbols used in industry today are what engineers use to identify parts of …

Read More »## RLC Circuit Transfer Function Calculation using Matlab

Plot the magnitude and the phase response of the voltage transfer function of series RLC circuit for frequencies from 10 Hz to 100kHz.: Here, we will compute the phase and the magnitude of the voltage transfer function Vo/V1 for frequencies ranging from 10 Hz to 100 kHz. The transfer function can …

Read More »## Node Voltages Calculation in Resistive Circuit using Matlab

Determine the voltage at each node of the circuit: FROM ABOVE CIRCUIT, we can write the following set of equations: $\begin{matrix} \begin{align} & {{I}_{{{R}_{4}}}}={{I}_{{{R}_{1}}}}+{{I}_{{{R}_{3}}}} \\ & {{I}_{{{R}_{2}}}}={{I}_{{{R}_{3}}}} \\ & {{V}_{1}}={{V}_{A}} \\\end{align} & \cdots & (1) \\\end{matrix}$ Or \[\begin{matrix} \begin{align} & \frac{{{V}_{C}}}{{{R}_{4}}}=\frac{{{V}_{1}}-{{V}_{C}}}{{{R}_{1}}}+\frac{{{V}_{B}}-{{V}_{C}}}{{{R}_{3}}} \\ & \frac{{{V}_{1}}-{{V}_{B}}}{{{R}_{2}}}=\frac{{{V}_{B}}-{{V}_{C}}}{{{R}_{3}}} \\\end{align} & \cdots & (2) \\\end{matrix}\] We can rewrite …

Read More »## Series RL Circuit Analysis using Matlab

Determine the voltage across the inductor in series RL circuit : Let us compute the voltage across the capacitor for t≥0 using the following expression: ${{v}_{L}}(t)={{V}_{s}}{{e}^{-t/\tau }}u(t)$ Whereas the source voltage is 1V and time constant τ=L/R. You May Also Read: Series RL Circuit Analysis Theory It’s time to write …

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