A direct current shunt motor runs at 600rpm when drawing 60A from a 230V supply. Armature resistance is 0.20 and field resistance is 1150. Determine the speed when the current through the armature is 30A.
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- A 220 V DC series motor runs drawing a current of 30 A from the supply. Armature and field circuit resistances are 0.4 and 0.1 respectively. The load torque varies as the square of the speed. The flux in the motor may be taken as being proportional to the armature current. To reduce the speed of the motor by 50% the resistance in ohms that should be added in series with the armature isA 250 V d.c. shunt motor takes a current of 20 A. Resistance of shunt field winding is 200 ohm and the armature is 0.3 ohm. What is the current in the armature ?A 250V series motor draws a current of 40A. The armature resistance is 0.15 ohm and the field resistance is 0.05 ohm. Determine the maximum efficiency of the motor.
- A series motor runs at 800 rev/min when the voltage is 400V and the current is 25A. The armature resistance is 0.4 ohm and the series field resistance is 0.2 ohm. Determine the resistance to be connected in series to reduce the speed to 600 rev/min with the same current.A 220 V series motor takes 15 A and runs at 700 rpm. The armature resistance including the resistance of the series winding is 0.8 ohm. At what speed will it run if a 2-ohm resistance is connected in series with supply voltage? Assume the motor is taking the same current.A series motor runs at 700 rev/min when the voltage is 300 V and the current is 20 A. The armature resistance is 0.3 2 and the series field resistance is 0.1 2. Determine the resistance to be connected in series to reduce the speed to 500 rev/min with the same current
- A separately excited motor develops 700N.m torque while drawing 35 amperes armature current. what is the motor speed in rpm if the armature voltage is 200 volts?Write the solution neatly. A 230 V d.c. shunt motor, having an armature resistance of 0.05 ohm and a fieldresistance of 75 ohms, draws a line current of 7 A while running light at 1120 rpm. Determine the motor efficiency when the line current at a given load is 46 A. Answer % = 83.92 %No chat GPT HAND WRITTEN ONLY OTHERWISE WILL LEAVE A DOWNVOTE