Reply to "Can I run my old AC powered loco's on DC ?"

CJ MeyersOGR Forum Member

A Lionel 'universal' motor has a wire wound field. What an E unit does, is reverse the polarity of the field with respect to the armature to make the motor reverse. If you ran a universal motor without an E unit on DC and switched the track polarity, the engine would still NOT reverse, because you're switching the polarity of both the field and the armature.

Unlike a permanent magnet motor, where the field polarity is 'permanent' (duhh) and track polarity switches the armature only. THEN the motor reverses.

Or am I wrong? (I don't think so....)

3/8/199:45 AM

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