An electronically commutated motor has a rotor (108), a stator having a stator winding arrangement (102), and a full bridge circuit (137) for controlling the current (i1, i2) in the stator winding arrangement (102); in the full bridge circuit (137), first semiconductor switches (114, 130) are connected...http://www.google.com/patents/US6906486?utm_source=gb-gplus-sharePatent US6906486 - Electronically commutated motor
