Abstract: A stepping motor of the homopolar design with a step angle of 3.6.degree. and having a generally cubic form is disclosed. The motor includes a generally square, single-section laminated stator which has only four stator poles extending radially inwardly from the middle regions of the straight sides, and a concentric rotor secured to a shaft journaled in a pair of bearing bells fixed to the stator at the opposite faces thereof and having the same generally square configuration. The rotor includes a disc-shaped permanent magnet of high remanent energy density (B.times.H).sub.max .gtoreq.10.times.10.sup.6 GOe, and a pair of annular steel rotor elements provided at the working air gap with identical numbers Z.sub.r of rotor teeth of pitch .tau..sub.r =360.degree./Z.sub.r. Each stator pole is provided at the working air gap with four or five stator pole teeth of pitch .tau..sub.s =360.degree./Z.sub.s, where Z.sub.

Abstract: In the disclosed motor arrangement, a single stator operates with one of eight rotors having a number of teeth equal to Z.sub.R = 5u(n + 1) .+-. gu. In the equation, n is one less than the number of teeth on each pole of the stator, u is equal to the number of pole groups, and g is any integer varying from 1 to 4. Energizing the poles of the motor is one of five winding arrangements. The motor, with a single stator, is capable of stepping at one of 40 stepping angles.