Q3/ A 6-pole, 220V wave connected shunt motor gives 3 KW when running at 1000rpm and drawing the armature and field current of 60A and 3A. It has 700 conductors. Its resistance is 0.30. Find: 1-Armature torque 2-Shaft torque 3-Lost torque 4-Total losses 5-Efficiency (30 mark)

An induction motor having full load torque of 60 Nm when delta-connected develops a starting torque of 120 Nm. For the same supply voltage, if motor is changed to star -connection, then starting torque developed will be Nm.

A 220 V shunt motor has an armature resistance of 0.4 ohm and field resistance of 140 ohm. The motor draws 6 A at 1600 rpm at no load. Calculate the speed and shaft torque if the motor draws 52 A at rated voltage.

A 220V dc shunt motor takes 4A at no load and runs at 700 rpm. Ra = 0.60 ohm and Rsh = 110 ohms. What is the efficiency of the motor when the motor input is 8800 W?   a. 81.67% b. 80.2% c. 82.05% d. 79.44%

Final 1A DC shunt motor is rated 10HP, 250V and is connected to 235V source. The armature resistance is 0.2 ohm, the field circuit resistance is 125 ohm and the total rotational losses are 380W. The motor is driving a load, and it draws an armature current of 30A, Calculate the output power. b) 41 d) 6490 6870 7492 7460 Boş birak

A 10 kW, 250 V shunt motor has an armature resistance of 0.5 Ω and a field resistance of 200 Ω. At no load and rated voltage, the speed is 1200 rpm and the armature current is 3 A. At full load and rated voltage, the line current is 40 A and because of armature reaction, the flux is 4 % less than its no-load value. What is the full load speed?

A 110 V shunt motor has a field resistance of 55 ohms and armatureresistance of 0.1 ohm. The motor takes 20 A of current at 1000 rpm whiledeveloping full load torque. What is the motor speed when this motordevelops 70% of the full load torque.

A shunt motor with an armature winding resistance of 0.01 Ohm and a field winding resistance of 25 Ohm is fed with DC 50 V and the motor draws 15 A from this source under a load it drives. The mechanical losses that occur when the motor rotates at 1500 rpm (rpm) are 30 W. Calculate the efficiency (%) of the motor and the torque transferred to the shaft (torque, Nm) for this operating condition. [desired: Efficiency-percentile, shaft torque (Nm)] a.93.44 - 60.13 Nm b.82.44% - 4.13 Nm c.83.44 - 40.13 Nm D.73.44 - 30.13 Nm

A 200V shunt motor develops 23hp, when taking 20.2 kW. The field resistance is 50 ohms and the armature resistance is 0.06 ohm. What is are the rotational losses?   a. 1125 W   b. 1667 W   c. 917 W   d. 825 W

A 200 V dc motor takes 50 A in series and is operating at a speed of 1000 rpm when full of electrical components (load). Its resistance is 0.2 Q. What value of series resistance will offer a rated torque at 800 rpm?