Answer to Question #139528 in Electrical Engineering for Niveditha P

Question #139528

In a PMDC motor, when the armature is rotated at 100rpm, an emf of 2V is developed across its terminals. For this motor, calculate the armature current flow required to generate a torque of 0.4Nm


1
Expert's answer
2020-10-25T19:47:34-0400

Required torque( ) = 0.4 Nm

=2V

Mechanical power delivered =

Where = Back emf and , = Armature current, = anguar frequency.


= 10.472 rad/sec

Therefore Ia = = 0.4*10.472/2 = 2.0944 A




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