Lab. 7 Modelling and Simulation of a Separately Excited DC Motor

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School

California State University, Long Beach *

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350

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Electrical Engineering

Date

Dec 6, 2023

Type

docx

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Uploaded by HighnessDinosaur3576

Lab. 7: Modelling and Simulation of a Separately Excited DC Motor ID: 027774511 EE 350 s 03 10/31/23

Introduction The purpose of this lab is to simulate a open circuit and close circuit test on Matlab’s simulink using a single-phase power transformer. With the results the simulation gives us we will calculate the transformers parameters in its equivalent circuit. Then we will compare these values to the actual values of the transformer and see how they are similar or different. Procedure We are measuring the voltage, current, and power of each component in the circuit. For current we are placing a current measurement device in series with the circuit since the entire circuit is in series and therefore had the same current all throughout. For voltage we use a voltage measurement device and, in some instances, an RMS device in parallel with each component. We use RMS values in AC (Alternating Current) circuits since it is the most common way of writing voltage. Finally, we add a power measurement device for each component taking in the Vmax, Imax for each device and displaying it out on a screen. We use MATLAB's linear transformer to simulate the open and closed- circuit test. The only difference hardware wise between the two tests is a wire connecting the secondary side together. We use the parameters to calculate the Rc, Xm, Req, and Xeq of the transformer. Data Open Circuit

Closed Circuit

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Discussion According to the data collected from the lab, the calculated values for the transformer parameters align very closely with the actual parameters of the linear transformer which MATLAB provided. There are slight errors which cause the values to not align exactly such as rounding up/down. Now we know how to simulate transformer tests to calculate its values.