@EricF posted:Interestingly, the "Pullmor" and postwar universal motors will run on AC or DC. Under DC, they just need a means to control how the DC polarity is fed to the motor to produce reversing action. That's done by adding a bridge rectifier into the circuit between then DCC decoder's motor driver outputs and the motor itself. Nowadays, there are plenty of small, reliable and low-cost bridge rectifiers available to do the job. That wasn't so in the not-so distant past.
That's true, the Pullmor will run on DC but the stator is grounded to the frame / outside rail. The motor needs to be completely isolated from the track power otherwise you'll have ac power back feeding into the motor power outputs of the board. I don't think the board is going to like that, i'm not sure a rectifier on the output leads of the motor driver is going to work. This is why ERR makes a specific AC commander for open frame motors like the pullmor and a DC commander that will not work with pullmors. This also (partially) why you can not use a PS3 upgrade kit on Lionel engines with open frame motors. All of the MPC upgrades I've seen with PS2 or PS3 kits involved removal of the pullmor and replacing it with a can motor.
