DC Series Motor Drum Controller

[nehasfun]

Plz can anyone here tell me something general things about DC series motor Drum Controller? I've been trying to find it out but all in vain! Plz help

[dlgoff]

Do you mean Drum as in Percussion?

[berkeman]

Or maybe a big rotating drum like a cement mixer?

[nehasfun]

Oh no! by drum controller I mean a starter like device. Perhaps it is used instead of a 3 point starter to run a DC series machine, but iam not sure. I want accurate facts like why the name drum? etc.