Why should a series motor always start with a load?

Question by Shock_Value: Why should a series motor always start with a load?

Why should a series motor always start with a load?
Why should a shunt motor always start without a load?




Best answer:

Answer by philhoonoseitall
A series motor has [in theory ] infinite torque at zero revs and will rev to infinity if not under load.[ it will of course not reach infinity as it has bearing friction and a little fan inside to slow it, but it can go at an alarming speed and damage itself.]
A shunt wound motor will have a set running speed,[usually 1500 or 3000 rpm] and will go to that speed without going above it even with no load and has high torque at high revs, at which point you can apply the load.

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