EA = V dc Question 1.3 Vary the field rheostat and notice if the armature voltage E, changes. Question 1.2 Measure the open circuit armature voltage. If not, turn off the power supply and interchange any two of the stator connection leads on the synchronous motor. Question 1.1 Note if voltage EA builds up. The synchronous motor should start running. Place the resistance switches for no-load (all switches open). Make sure the brushes are in their neutral position. Turn the DC generator field rheostat control knob full cw for minimum resistance. Couple the synchronous motor and the DC generator with the timing belt. Using your DC Motor/Generator, DC Voltmeter/Ammeter and Resistive Load, connect the circuit shown in Figure 9-2. ARMATURE R SERIES FIELD FIELD RHEOSTAT V EA 0-200 Vdc А SHUNT FIELD Ro Figure 9-2. Terminals 8 and N on the power supply provide fixed DC Terminals 1, 2, and 3 on the power supply provide fixed three-phase power for the three stator windings (Three-phase power will be covered in later Experiments). Using your Power Supply, AC Ammeter and Three-Phase Synchronous Motor/Generator, connect the circuit shown in Figure 9-1. Follow the steps below in LVSIM-EMS and answer the questions (show LVSIM-EMS screenshots): The DC Compound Generator Because of its constant running speed, the synchronous motor will be used to mechanically drive the DC generator.
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