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230V, 10A, 1500rpm DC separately excited motor having resistance of .2 ohm excited from external dc voltage source of 50V. Calculate the torque developed by the motor on full load.(a) 13.89 N-m(b) 14.52 N-m(c) 13.37 N-m(d) 14.42 N-mThe question was posed to me in my homework.This key question is from Dynamics topic in portion Dynamics of Electrical Drives of Electric Drives

Answer» CORRECT OPTION is (b) 14.52 N-m

To explain: Back EMF developed in the motor during full load can be calculated using equation Eb = Vt- I*Ra = 228 V and machine constant Km = Eb / Wm which is equal to 1.452. Torque can be calculated by using the RELATION T = Km* I = 1.452*10 = 14.52 N-m.


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