Single phase stepping motor

Details Single phase stepping motor Single phase stepping motor

1978-02-09

1980-06-03

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310154, 310268, H02K 3700

Patent

active

042063760

ABSTRACT:
A single phase stepping motor, particularly for clocks, with a rotor having several pole teeth and a stator, the latter being made of two stator parts connected with one another via a bridge part, the latter carrying the excitation winding, of which each stator part on its free end transfers into an equal or smaller number (in comparison to half the rotor pole number) of stator pole teeth, the stator pole teeth being directed towards the face side of the rotor. Both stator parts are arranged in a first plane at least in the region of the stator pole teeth and the rotor rotates in a second plane parallel thereto. The pole teeth of the rotor each comprises a main pole and an auxiliary pole, the latter extending in the direction of rotation and formed on the main pole, and between the stator pole teeth, there is provided a permanent magnetic circuit, by means of which circuit the rest position of the rotor is determined during the unexcited condition of the stator.

REFERENCES:
patent: 2546729 (1951-03-01), De Millar
patent: 3731125 (1973-05-01), Nikaido et al.

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