HYBRID TYPE STEPPING MOTOR

PURPOSE:To wind at least two types of complete phase windings on a stator core. CONSTITUTION:A hybrid type stepping motor has P pieces of stator salient poles 11, 12, 13,..., and a plurality of stator teeth 1a arranged on opposite surfaces of the poles to a rotor 2. Pitch angles tauA of centers of stator teeth groups arranged on the adjacent stator salient poles are provided at (P-B) positions, the pitch angles tauB are provided at positions B, and the number P and the angles tauA, tauB have predetermined relationships. Thus, a stator 1 is wound with windings of m phases or n phases. P=am (when mn is even, a=2, while when mn is odd, a=1), tauA={N+(k/p)}tauR, tauB={N+x+(k/p)}tauR, N is integer number of 1 or more, tauR is a rotor teeth pitch, ¦x¦=1, 2 or 3, k is positive integer number which does not exceed P and has no conjugate number with the P, and B=m, n or am (m