| http://www.w3.org/ns/prov#value | - Switching time in relation to shaft position is controlled by sensing the back EMF in the stator coils, the sensing circuit including a transformer having a first winding...http://www.google.ca/patents/US4136308?utm_source=gb-gplus-sharePatent US4136308 - Stepping motor controlAdvanced Patent SearchPublication numberUS4136308 APublication typeGrantApplication numberUS 05/828,541Publication date23
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