Fault-tolerant apparatus for controlling blade pitch

Details Fault-tolerant apparatus for controlling blade pitch Fault-tolerant apparatus for controlling blade pitch

1992-01-03

1993-02-02

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Having positive means for impeller adjustment

416 31, 416 32, 416151, 416152, 188267, 188164, B63H 300, B63H 306

Patent

active

051833875

ABSTRACT:
Fault-tolerant apparatus for controlling first and second input members of a mechanical actuator includes first and second electrical machines and at least two controllers. The first and second electrical machines, which apply braking forces to the first and second input members, respectively, are provided with stators having pluralities of isolated phase windings. Each controller is coupled to a phase winding of the first electrical machine, and also to a phase winding of the second electrical machine. Any one controller can excite the first electrical machine to apply the braking force to the first input member or the second electrical machine to apply the braking force to the second input member.

REFERENCES:
patent: 2314025 (1943-03-01), Waseige
patent: 2370135 (1945-02-01), Berliner
patent: 2868304 (1959-01-01), Horn
patent: 3020007 (1962-02-01), Hine
patent: 4578019 (1986-03-01), Safarik
patent: 4591313 (1986-05-01), Miyatake et al.
patent: 4678401 (1987-07-01), Bradford et al.
patent: 5023499 (1991-06-01), Kuwahara

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