Hybrid-type stepping motor

摘要: PROBLEM TO BE SOLVED: To prevent a decrease in permeance, by forming small tooth members with at least pitch between them different from the other pitches, and making one of these width members. SOLUTION: In six T1 to T6 each stator magnetic pole, T3 T4 , T2 T5 is made same, while have A, B, C, where pitches C are different. That is, A=6.66 deg., B=6.84 C=7.38 coming near rotor circularly intervals phase difference 0.5δ1 =0.075π, 0.5δ2 =0.175π or 0.5δ3 =0.125π. The permeance 92% that larger than prior art embodiment.