Structure of stepping motor and method of driving the stepping m

Details Structure of stepping motor and method of driving the stepping m Structure of stepping motor and method of driving the stepping m

1988-04-06

1989-08-15

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 43, 310 44, 310 49R, 335302, H02K 2112, H02K 102

Patent

active

048577863

ABSTRACT:
The present invention provides a large-thrust stepping motor improved in thrust constant by provision of slots at equal intervals between adjacent N and S poles of a permanent magnet disposed on a movable member of the motor or by division of the winding for each phase of a stator of the motor into two or more sections to pass currents independently through the divisional sections in accordance with the speed of the motor.
Further, the invention provides a large-thrust stepping motor using a field magnet having large magnetomotive force, the field magnet being formed by combination of a magnet substrate and permanent magnets independent from the magnet substrate.

REFERENCES:
patent: 4725750 (1988-02-01), Welch
patent: 4728830 (1988-03-01), Gamble
Laithwaite, E. R., Lincar-Motion Electrical Machines, Apr. 1970, Proceedings of the IEEE, vol. 58, No. 4, p. 531.

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