Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1991-03-04
1992-06-09
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
188161, 335179, H02K 7106, B60T 1304, H01F 718, H01H 920
Patent
active
051210185
ABSTRACT:
A magnetic brake provides braking or locking capability and is remotely controlled by electric power. The magnetic brake comprises a rotatable shaft and a brake disc mounted on the shaft. A non-rotating core housing assembly located around the shaft includes a permanent magnet and a bipolar solenoid. A magnetic armature adjacent to the core housing assembly is capable of movement toward the core housing assembly and toward and into engagement with a brake disc to prevent rotation of the shaft. A spring urges the armature away from the core housing assembly and into engagement with the brake disc. The brake does not use any electric power to maintain the brake in the set mode with the rotating shaft fully locked, or in the released mode with the rotating shaft fully released. The permanent magnet is of sufficient strength to hold the armature against urging of the spring until an opposite polarity is supplied by the solenoid.
REFERENCES:
patent: 3512618 (1970-05-01), Schafer
patent: 3534307 (1970-10-01), Spewock et al.
patent: 3763968 (1973-10-01), Noly
patent: 4237439 (1980-12-01), Nemoto
patent: 4855699 (1989-08-01), Hoegh
patent: 4999530 (1991-03-01), Azuma et al.
patent: 5057728 (1991-10-01), Dammeyer et al.
Lucas Aerospace Power Equipment Corporation
Rebsch D. L.
Stephan Steven L.
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