# WVU EE 327 - Separately Excited DC Motor (26 pages)

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## Separately Excited DC Motor

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## Separately Excited DC Motor

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Pages:
26
School:
West Virginia University
Course:
Ee 327 - Signals and Systems 1
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EE 327 Signals and Systems West Virginia University Separately Excited DC Motor Prepared by Cheri Settell Jeannine Meyers Janet Klinkhachorn Submitted to Dr Ali Jalali EE327 November 22 2002 Table of Contents 1 2 3 4 5 6 7 8 9 Abstract Introduction Design Approach Theory Figure 1 Separately Excited DC Motor Schematic Calculations MatLab Code Procedure Results Figure 2 Initial Value Graphs Figure 3 Increased Rf Graphs Figure 4 Increased Lf Graphs Figure 5 Increased both Rf and Lf Graphs Figure 6 Decreased Rf Graphs Figure 7 Decreased Lf Graphs Figure 8 Decreased both Rf and Lf Graphs Analysis Figure 9 Comparison of Rf Values Figure 10 Comparison of Lf Value Figure 11 Comparison of Changing Both Rf and Lf Values Conclusion Bibliography 3 4 6 7 7 9 10 11 13 13 14 15 16 17 18 19 20 22 23 23 24 26 2 Abstract Our team was tasked with finding a way for the armature current field current speed and back emf of a Separately Excited DC Motor to have no attenuation in the graph of the values vs time The project had to be simulated using MatLab Our team used the differential equations pertaining to the speed armature current field current and back emf of the Separately Excited DC Motor to simulate the motor in MatLab Once the code was written base values for the field resistance and inductance and the base values for the armature resistor and inductor were assigned and the simulation ran After the initial values were taken the simulation was run again increasing and decreasing the field resistor and inductor values From the data collected it was concluded that optimal conditions were reached by decreasing the field inductance from 50 to 25 ohms and leaving the field resistor at 75 ohms 3 1 Introduction A DC motor converts electrical power into mechanical power because of this DC machines are used in special heavy duty applications like draglines electric trains and steal mills They are used for these applications because their speed and torque can easily be varied without

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