Speed control

Details Speed control Speed control

1978-08-02

1980-09-23

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 94, 310105, H02K 4902

Patent

active

042245451

ABSTRACT:
A speed control arrangement for a rotatable member driven by an energy source, such as a spring, whose driving torque can vary consists of an eddy current brake comprising an eddy current rotor driven with the rotatable member and a magnetic circuit coupled to the rotor to exert a braking effect. The magnetic circuit is carried by an arm movable relative to the rotor by unwinding of the spring (or other change in torque) to alter the coupling, and the braking effect, as the torque exerted by the energy source varies.

REFERENCES:
patent: 1862267 (1932-07-01), Honig
patent: 2909683 (1959-10-01), Holzer
patent: 3256823 (1966-06-01), Keyes

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