Electromagnetic rotary actuator

Details Electromagnetic rotary actuator Electromagnetic rotary actuator

1979-07-26

1981-06-23

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

310 49R, 335229, H01F 718

Patent

active

042753716

ABSTRACT:
An electromagnetic rotary actuator including three laminated pole pieces equiangularly spaced about an output shaft. Each of the pole pieces has a bobbin coil wound thereabout. The output shaft rotor is magnetized with four 90.degree. poles. One of the stator coils is utilized as a reference coil and is energized with a DC current. The other two coils are each coupled to a respective drive transistor. The drive signals to the two drive transistors are complementary. The resultant magnetic field set up by the three stator coils interacts with the magnetic field from the output shaft rotor to move the output shaft to a selected angular position.

REFERENCES:
patent: 2446579 (1948-08-01), Fritzinger
patent: 3206160 (1965-09-01), Bennett
patent: 3434082 (1969-03-01), Montagu
patent: 3596119 (1971-07-01), Goldman
patent: 3599069 (1971-08-01), Welch
patent: 3681525 (1972-08-01), Wada et al.
patent: 3849714 (1974-11-01), Goretzki et al.

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