Patent ID: 6225773
Filing Date: 2001-05-01
Classification: H02K

Abstract:
A method of driving a stepping motor comprising a stator having 6 m pieces of stator main magnetic pole extending radially with Ns pieces of pole tooth formed on a tip end of each stator main magnetic pole piece, and windings wound around the stator main magnetic pole pieces, anda hybrid type rotor consisting of two magnetic rotor elements arranged so as to face a periphery of the stator through an air gap, Nr pieces of pole tooth being formed on a periphery of each of the rotor elements, wherein phase windings are wound around adjacent three stator main magnetic pole pieces and are connected to form a star connection or a delta connection, the method comprising:exciting the phase windings in order by voltages, a phase of the voltage applied on the winding wound around (n)th main magnetic pole piece being deviated by 30.degree. from a phase of the voltage applied on the winding wound around (n+3)th main magnetic pole piece among the 6 m pieces of the main magnetic poles, where m is an integer and is .gtoreq.1, Ns is an integer and is .gtoreq.1, and Nr is an integer and is .gtoreq.2.