04. a. Couple the motor to the electrodynamometer with the timing bett b. Set the dynamometer control knob at its full c

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04 A Couple The Motor To The Electrodynamometer With The Timing Bett B Set The Dynamometer Control Knob At Its Full C 1 (100.5 KiB) Viewed 16 times

04. a. Couple the motor to the electrodynamometer with the timing bett b. Set the dynamometer control knob at its full ccw position. c. Repeat procedures 3 for each of the torques listed in Table 5-1, maintaining the input voltage at 415 V ac. TORQUE (N-m) 0 اماها 0.3 0.6 0.9 1.2 T Retum the voltage to zero and turn off the power supply. h 4 h (amps) (emps) (amps) 0.25 0.25 0.30 0.29 0.41 0.42 0.56 0.66 External Rotor Resistance, Rext = 0rt 0.55 0.66 0.68 b) apparent power ✓c) active power ✔✓d) reactive power e) power factor 0.30-25 0.328 Table 6-1. Dala table when Rotor external Rext = 02 g) efficiency W, (watts) 90 0.48 27 120 0.57 55 150 80 W₂ (watts) 75 f) mechanical output power Rext=0.52 Torque = 0.9N-m 2. Using the results of Table 5-1 calculate the 0.9 N-m characteristics of the wound-rotor motor (with 0 external rotor resistance). a) average current SPEED (r/min) 1461 1418 1369 1305 180 1227 resistance 5-3 A ac W var