Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1992-04-17
1994-04-12
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 49R, 310162, 310179, 310254, H02K 2112
Patent
active
053028759
ABSTRACT:
This n-phased electromagnetic motor having two rotation senses and in which n is greater than 1, is particularly intended to drive the mechanism of a timepiece movement. It comprises n magnetic circuits, each being magnetically decoupled from n-1 other magnetic circuits. Each magnetic circuit includes two stator poles (4a and 4c, 4b and 4d) each comprising a polar expansion (6a to 6d respectively) partially defining a stator cavity (3) in which a rotor (2) is housed. These two stator poles are diametrally opposite one another relative to the axis (X--X) of the rotor (2). The magnetic separation of the magnetic circuits is assured by means of one or several gap(s) (15) judiciously arranged.
REFERENCES:
patent: 3989967 (1976-11-01), Kikuyama
patent: 4336471 (1982-06-01), Plancon
patent: 4546278 (1985-10-01), Xuan
patent: 4782353 (1988-11-01), Ogihara
patent: 4958099 (1990-09-01), Chigira
patent: 5068562 (1991-11-01), Tagami
patent: 5130594 (1992-07-01), Tagezout et al.
patent: 5132578 (1992-07-01), Iwasa
"Rotation by the Digits with permanent-magnet stepper motors", L. J. Chiarella, Machine Design, vol. 42, No. 29, Nov. 26, 1970.
Eta SA Fabriques d'Ebauches
Skudy R.
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