Limited angle rotary actuator

Details Limited angle rotary actuator Limited angle rotary actuator

1990-08-31

1991-08-06

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310156, 310166, 335272, H01F 718, H02K 2118

Patent

active

050380648

ABSTRACT:
A limited angle torque actuator produces a substantially constant torque over an excursion angle of 90 degrees or more. The actuator uses a core made from a highly permeable magnetic material such as soft iron. In a preferred embodiment, one or more permanent magnets are attached to the outer surface of the cylindrical core. In another embodiment, the permanent magnets are spaced apart from a stationary core to create an air gap therebetween. When current flows through a coil wound on the stator, first and second stator poles are created which interact with the permanent magnets to rotate the rotor assembly.

REFERENCES:
patent: 3214662 (1965-10-01), Wolf
patent: 3278875 (1966-10-01), McDonough
patent: 3435395 (1969-03-01), Rosenberg et al.
patent: 3644763 (1972-02-01), Skrobisch
patent: 3694782 (1972-09-01), Ray
patent: 3949250 (1976-04-01), Walker et al.
patent: 3970979 (1976-07-01), Montagu
patent: 4227164 (1980-10-01), Kitahara
patent: 4246504 (1981-01-01), Clifford et al.
patent: 4275371 (1981-06-01), Vogel
patent: 4447793 (1984-05-01), Gray
patent: 4491815 (1985-01-01), Idogaki et al.
patent: 4510403 (1985-04-01), Vanderlaan et al.
patent: 4600864 (1986-07-01), Sato
patent: 4612526 (1986-09-01), Vanderlaan et al.
patent: 4724811 (1988-02-01), Maisch
patent: 4779069 (1988-10-01), Brown
patent: 4804934 (1981-02-01), Finke et al.
patent: 4816707 (1989-03-01), Vanderlaan
patent: 4850322 (1989-07-01), Uthoff et al.
patent: 4868434 (1989-09-01), Hayashi
patent: 4889073 (1990-03-01), Takeuchi et al.
patent: 4938190 (1990-07-01), McCabe
Fleisher, William A., Brushless Motors for Limited Rotation, Machinery Design, 12-07-89.
Cooper, William David, Electronic Instrumentation and Measurement Techniques, Second, Edition, Chapter 4, 1978.

Affiliated with

Also associated with

Rating

Limited angle rotary actuator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Limited angle rotary actuator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Limited angle rotary actuator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1989398