| http://www.w3.org/ns/prov#value | - f the gear-like salient poles of the rotor is represented by z, and n is an integer equal to or larger than 1 (n???1), and magnetic polarities of adjacent stator magnetic poles are opposite polarities to each other by switching phase excitation, the following relationships are satisfied: m=9, and the stator is a 3-phase winding stator, it is set that z=9n???3. 2.
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