Zero air gap orbiting gear stepper motor

Details Zero air gap orbiting gear stepper motor Zero air gap orbiting gear stepper motor

1993-04-05

1994-02-22

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310106, H02K 3700

Patent

active

052890651

ABSTRACT:
A stepper motor having an internally toothed ring gear acting as a stator which is contacted by one or more pinion gears supported by a carrier. The ring gear stator is made up of several sets of teeth which are separately magnetically polarized to move the pinion gears about the ring gear. Three toroidal coils are preferably provided to charge three different sets of teeth which are arranged in a repeating series of three about the ring gear. Alternatively, a linear actuator can be provided to provide a linear output. The teeth may also include an individual coil wherein sets of teeth can be electromagnetically biased into a north or south polarity or remain neutral.

REFERENCES:
patent: Re27446 (1972-07-01), Welch
patent: 2857536 (1958-10-01), Light
patent: 3147425 (1961-10-01), Christoff
patent: 3561006 (1971-02-01), Humphreys
patent: 4358694 (1982-11-01), Grundland
patent: 4780636 (1988-10-01), Gandhi et al.

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