‏The speed of a 11 KW, 150 V, 1300 rev/min separately excited DC motor is controlled...

‏The speed of a 11 KW, 150 V, 1300 rev/min separately excited DC motor is controlled by a

‏single-phase fully-controlled thyristor converter. The rated motor current is 25 A, and the

‏armature resistance is Ra = 0.5 Ohm. The ac supply is 160 V. The motor voltage constant KE =

‏0.182 V/rev/min. Assume that sufficient inductance is present in the armature circuit to make

‏the armature current continuous and ripple free.

‏For a firing angle of alpha = 20 degree and rated motor current, calculate:

‏(a) The motor torque

‏(b) The supply power factor

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Manojponduru answered 2 years ago

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