Rotary actuator

Details Rotary actuator Rotary actuator

1988-01-19

1989-09-26

Ro, Bentsu

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

310 27, 335229, G05B 1904, H02K 3318

Patent

active

048703354

ABSTRACT:
A rotary actuator includes a case, a shaft rotatably supported in the case, a moving coil with conductors extending radially from the shaft as a center, a support which supports the moving coil on the shaft, facing magnets set with facing unlike poles arranged alternately in the direction of motion of the moving coil on either side of it and generating a magnetic flux which crosses the moving coil conductors, a device for restricting rotation of the shaft such that the conductors of the moving coil do not move outside the magnetic flux generated by the magnet set, and a drive unit for sending electric current through the moving coil. The rotary actuator may further include an assisting device for assisting shaft rotation which includes moving magnets on the side edges of the support and fixed magnets installed in the case facing the moving magnets, either the moving or fixed magnets being electromagnets.

REFERENCES:
patent: 1985082 (1934-12-01), Faus
patent: 2495858 (1950-01-01), Marti
patent: 2547665 (1951-04-01), Rowell
patent: 2833989 (1958-05-01), Nylander
patent: 2836796 (1958-05-01), Millar et al.
patent: 2846649 (1958-08-01), Hornauer
patent: 2958041 (1960-10-01), Schake
patent: 3036243 (1962-05-01), Glassburn
patent: 3056341 (1962-10-01), Grey
patent: 4223266 (1980-09-01), Scannell

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