Stepper motor

Details Stepper motor Stepper motor

1975-09-30

1976-12-21

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310154, H02K 3700

Patent

active

039990907

ABSTRACT:
A unidirectional direct rotary stepper motor is adapted to step its rotor between successive stable rest positions in response to successive electrical pulses of opposite polarity. The motor includes a rotor having a central hub portion and a plurality of annularly aligned similar blades, an energizing coil, and a core which passes through the energizing coil and has a first pole face disposed in close relationship with the rotor hub portion, and a second spaced-apart pole face disposed in close relationship with the rotor blades. An annular array of similar permanent magnets of sequential opposite polarity is disposed on the surface of the core pole opposing the rotor blades in serial intervention in the coil flux path.

REFERENCES:
patent: 3456138 (1969-07-01), Huber
patent: 3596119 (1971-07-01), Goldmann
patent: 3644764 (1972-02-01), Newell
patent: 3757147 (1973-09-01), Lyman, Jr.
patent: 3783313 (1974-01-01), Mathur
patent: 3845335 (1974-10-01), Oguey
patent: 3860842 (1975-01-01), Schwab et al.

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