The shape of the speed-armature current characteristics in DC series motor are __________(a) Hyperbolic(b) Parabola(c) Circle(d) EllipseI have been asked this question in unit test.My question is from Dynamic Braking of DC Series Motors topic in section Braking of DC Motors & Induction Motors of Electric Drives

The shape of the speed-armature current characteristics in DC series m

1.	The shape of the speed-armature current characteristics in DC series motor are __________(a) Hyperbolic(b) Parabola(c) Circle(d) EllipseI have been asked this question in unit test.My question is from Dynamic Braking of DC Series Motors topic in section Braking of DC Motors & Induction Motors of Electric Drives
Answer» The correct ANSWER is (a) Hyperbolic Best explanation: The shape of the speed-armature CURRENT characteristics in DC SERIES motor is hyperbolic. The motor EQUATION is Eb=Vt-IaRa=Km∅ωm. N=(Vt/KmIa)-Ra/Km. N∝1÷Ia.

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