Limited angle electric rotary actuator

Details Limited angle electric rotary actuator Limited angle electric rotary actuator

1982-09-30

1983-08-09

Duggan, Donovan F.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

310 36, 310266, H01F 708

Patent

active

043981674

ABSTRACT:
An electric rotary actuator for producing rotation through a limited angle comprises a rotor winding made of a plurality of thin loop coils arranged in a continuous cylindrical framework as part of a rotor shell. The rotor shell lies in an annular flux gap defined by a stator magnet assembly and a flux return means. Each pair of adjacent axially extending limbs of adjacent loop coils lies opposite to and cooperates with a respective stator pole face. This winding arrangement helps to optimize the torsional resonance characteristics of the rotating mass.

REFERENCES:
patent: 3076111 (1963-01-01), Burgwin
patent: 3089044 (1963-05-01), Bolton
patent: 3118076 (1964-01-01), Held
patent: 3121851 (1964-02-01), Packard
patent: 3152275 (1964-10-01), Aske
patent: 4019075 (1977-04-01), Kagami
J. S. Heath, "Design of a Swinging Arm Actuator for a Disk File", IBM Journal of Research & Development, Jul. 1976, pp. 389-397.
P. Y. Hu, "Limited Rotation Motor", IBM Technical Disclosure Bulletin, vol. 16, No. 7, Dec. 1973, pp. 2259-2260.
H. G. Dickie, et al., "Meter Movement Rotary Actuator", IBM Technical Disclosure Bulletin, vol. 22, No. 1, Jun. 1979, pp. 355-357.

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