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
Required torque( ) = 0.4 Nm
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