ELEC302 Lab 8 - ELEC302-01 Lab#8 DC Generator April 8th...

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ELEC302-01 Lab #8: DC Generator April 8 th , 2008 David Bunn Michael Schmick The work contained herein is our own. We have neither knowingly given nor received any portion of this laboratory report .
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Introduction: The basic principles of a DC generator were explored. Various resistances were used to compare separately excited, shunt, and compound generators. Field current was also varied to give a magnetization curve for the separately excited generator. Equipment List: EMS8821 Power Supply Module EMS8311 Resistance Module EMS8960 Prime Mover/ Dynamometer Module EMS8211 DC Motor/Generator Module EMS9062 Data Acquisition Interface (DAI) EMS30004 DAI 24V Power Supply Procedure: Part One: Separately Excited DC Generator Magnetization Curve All components were assured to be present and in proper working order. The 24V power supply was attached to the DAI and the prime mover and the power turned on. The LabVolt data software was brought up and the measurement template loaded. The circuit of Figures P-1 and P-2 were constructed on the workstation. The prime mover module was set to Prime Mover mode and the display put on Speed (N). The Torque, Speed, and Ground inputs were connected to the DAI. The resistive module (R L ) was set to ∞ (no load) and the power to the voltage power supply turned on. The rheostat was adjusted until a field current of 0.4A was measured, then the voltage increased until the speed was approximately 1000 r/min. A data table (Table D-1) was created of the output voltage, field current, output current, speed, and torque, with the field current being reduced by 0.05A each measurement, while the speed was being kept constant until the rheostat was at minimum. Output Voltage and Field Current were graphed in relation to each other (Figure D-1). The voltage was turned down to zero and the power supply turned off. R L was adjusted to be 100Ω (all three at 300Ω in parallel), and the same measurements taken on a separate data table (Table D-2) with the field current being adjusted from 0.4 to minimum. Output Voltage and Field Current were graphed in relation to each other with this new resistance as well (Figure D-2). The voltage was turned down to zero and the power turned off.
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  • Spring '08
  • Peeples
  • power supply, output voltage, Electrical generator, Output Voltage Vs, Dai, Shunt Armature Circuit Construction

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