Stepping motor

Details Stepping motor Stepping motor

H - Electricity

02

K

310/58

H02K 37/00 (2006.01) H02K 37/18 (2006.01)

Patent

CA 1078000

STEPPING MOTOR Abstract of the Disclosure A stepping motor of the homopolar design with a step angle of 3.6° 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 x H)max ? 10x106 GOe, and a pair of annular steel rotor elements provided at the working air gap with identical numbers Zr of rotor teeth of pitch ?r = 360°/Zr. Each stator pole is provided at the working air gap with four or five stator pole teeth of pitch ?s = 360°/Zs, where Zs is the theoretically maximum available number of stator pole teeth and must be evenly divisible by 4, and Zs = Zr - 1 ? k where k is an even integer and 0?k?6. A special twin-section insulation member adapted to be axially fitted into the stator from the opposite faces thereof and designed to permit simul- taneous machine winding of the field windings onto the respective stator poles is also disclosed.

290731

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