(ET) Re: surging, motor

[Michael Neverdosky <MichaelN cycat com>]

If it is indeed shunt wound then dynamic braking is only possible 
if you power the field separately from the armateur.

You could also install an electric brake that could be used to stop
the blower quickly in an emergency.

I used to work in safe guarding industrial machinery (punch presses,
press brakes, shears, etc.) so I take this safety stuff pretty
seriously.

michael

kdo cosmos5 phy tufts edu wrote:
> 
> Someone else claimed that the snowblower motor is shunt-wound.  If
> this is true, then presumably when you short the output, you kill the
> field, and then the motor can spin freely.