for more info for theory under
* shop.alpmicro.com/apeiron/
Go to Editor's Desk, then to Chronological Index, then to October, 2001, click up "The Unipolar Dynamotor: A Genuine Relational Engine" in PDF.
Please, notice that the topology and schematic will depend on what kind of homopolar motor you have in mind, e.g. rotary, linear, superconducting, etc.