3 Phase-controlled DC motor drives

3.4 Steady-state analysis ...• Average values: The steady-state performanceis developed by assuming that the averagevalues only are considered.• The armature voltage equationv a = R a i a + e• Termed by average valuesV a = R a I a + KΦ f ω mav• Average electromagnetic torque isTav= KΦfIa= KΦfV{a− KΦRafωmav} =KΦf1.35V cos{α − KΦRafωmav}