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For a D.C series motor, if Ta be the torque & Ia the armature current, then which relation is valid for the condition before saturation?
- ATa ∝ Ia
- BTa ∝ Ia2
- CTa ∝ 1/Ia
- DTa ∝ 1/Ia2
Answer not set
Discussion 1
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CCommunity
Torque is directly proportional to flux and armature current.
T ∝ ? Ia
In dc shunt motors, flux is constant. Hence torque is proportional to armature current.
T ∝ Ia
In dc series motors, flux is directly proportional to armature current. Hence torque is directly proportional to square of the armature current.
Ta ∝ Ia2
In dc series motor at saturation condition, flux is constant. Hence torque is proportional to armature current.
T ∝ Ia
T ∝ ? Ia
In dc shunt motors, flux is constant. Hence torque is proportional to armature current.
T ∝ Ia
In dc series motors, flux is directly proportional to armature current. Hence torque is directly proportional to square of the armature current.
Ta ∝ Ia2
In dc series motor at saturation condition, flux is constant. Hence torque is proportional to armature current.
T ∝ Ia