You might have to first check that the field coils are capable of
taking the same current as the armature coils.
Then you might have some control problems since I think I remember
that the theoretical top speed of a series would motor is infinite,
and the practical limit on the top speed is when the armature
This occurs when a series motor is run without load and is easily tested
with small motors.
Prototype conventionel traction motors are series motors but a no-load
situation cannot happen in normal operation.
A friend found a link to a digitraxx site having a diagram, it is as you
describe, the field goes to the + and - leads of the bridge rectifier,
the brushes are in series with the AC leads. This is on a Scale Craft
00 motor, spins like a top of a H-0 powerpack. Roger
Jim Guthrie wrote:
Old Lionel motors are series wound. They do not run away
or throw their windings when lifted off the track, because the
top speed is limited by the friction of the bearings and in the
gear drive. Series winding gives you higher starting torque
than shunt winding. (where the field and brushes are in parallel)
and with these small motors you need all you can get.
The motor brushes are in series with the bridge rectifier's
AC terminals. Run a wire from one supply terminal (or pickup)
to one brush. Run another from the other brush to one rectifier
AC terminal. Run another from the other AC terminal to the other
supply terminal (or the other pickup). Connect the field across
the bridge rectifier's + and - terminals. You will now have to
run the motor on DC current, because on AC it will attempt to
reverse direction 60 times a second and be nothing more than a
When I say 'pickup' I mean your wheels, shoes, overhead
trolleys, etc., unless you are using DCC, in which case I mean
the decoder output. With DCC, of course, you have AC in your
rails, but your motor is still being fed pulsed DC.
This has all been said before in this thread, but I wanted
to collect it all in one place for convenience. :)
Hello Gerald A friend found a link to a page that had a diagram to
wire the Bridge rectifier as you describe. It works well the not real
small 00 motor runs quite nicely, but draws over one amp, this may be
typical. The next challenge will be to get the chassis tuned up, there
are some driver and valve gear issues. Roger Aultman
snipped-for-privacy@gann> Dear Roger: