Multi-phase PM-type stepping motor

Details Multi-phase PM-type stepping motor Multi-phase PM-type stepping motor

1998-08-05

2000-11-28

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310257, 310261, 310112, 310114, 318696, 318685, H02K 3700, H02K 122, H02K 720, H02K 1600, H02P 800

Patent

active

061539538

ABSTRACT:
A multi-phase PM-type stepping motor comprising: a rotor constituted by a cylindrical permanent magnet with N poles and S poles magnetized alternately on an outer circumferential surface of the rotor; stator cores having teeth arranged in opposition to the N poles or the S poles on the outer circumferential surface of the rotor through a predetermined air gap; and excitation coils wound in the stator cores and for magnetizing the stator cores to thereby rotate the rotor; wherein, when the number of the stator cores is represented by n (n is an odd number not smaller than 5), and the magnetization pitch angle of the permanent magnet is represented by P, the teeth of the stator cores are shifted from each other by an angle of 2P
.

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