A 440 V, 3-phase, 10 pole and 50 Hz synchronous motor delivering a torque of 50/m Nm. Delivers a power of?

A 40Hp, 230V, 10pole, 50Hz three-phase induction motor is running at 585 rpm at rated load. If the stator loss amounts to 1000W and the efficiency of the motor at this load is 90%. Determine the torque lost by friction in lb-ft

A 420 Vdc, 8 pole Compound DC motor runs at 729 rev/min when drawing a load of 60 A from the supply when meeting a load demand of 28 kW. The compound motor has a Lap connected armature with 816 conductors. The Armature, Interpole, Series, and Shunt resistances are 0.295 Q, 0.0155 Q, 0.00118 Q, and 147 Q respectively. The series field has 6 turns per pole while the shunt field has 2800 turns per pole. Under full load conditions, the shunt current is 3.75 A, and the Friction and windage loss is Pf/w = 0.782 kW. Consider c =6 for lap winding. Assume constant shunt current and friction and windage loss, determine for a reduced output load of 14.5 kW; (a) The new armature current; (b) The new speed of the motor

A 220-V Y-connected synchronous motor is drawing 50 A at unity power factor from a 220-V power system. The field current flowing under these conditions is 2.7 A. Its synchronous reactance is 1.4 ohms. Assume a linear open-circuit characteristic. (a) Find phase voltage and induced emf for these conditions. (b) Find the torque angle. (c) What is the maximum power that the machine can handle under these conditions? (d) How much armature current would be required to make the motor operate at 0.80 PF leading?