Working range of the speed-torque characteristic, with increasing speed will ___________(a) Reduce(b) Increase(c) Remain same(d) Cannot commentThis question was posed to me during an online exam.My doubt is from Speed Control Using Field Control of Shunt Motor topic in chapter DC Motors of DC Machines

Working range of the speed-torque characteristic, with increasing spee

1.	Working range of the speed-torque characteristic, with increasing speed will ___________(a) Reduce(b) Increase(c) Remain same(d) Cannot commentThis question was posed to me during an online exam.My doubt is from Speed Control Using Field Control of Shunt Motor topic in chapter DC Motors of DC Machines
Answer» RIGHT ANSWER is (a) Reduce To elaborate: The working range of the speed-torque characteristic reduces with INCREASING speed in order for the armature current not to exceed the full-load value with a WEAKENING field. Thus, armature current gives the bound LIMIT for curve.

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