Soft-start electromagnetic coupling

Details Soft-start electromagnetic coupling Soft-start electromagnetic coupling

1987-05-11

1988-06-07

Bonck, Rodney H.

192 clutches and power-stop control

Clutches

Progressive engagement

192 84R, 192 84C, F16D 2710, F16D 2714

Patent

active

047490730

ABSTRACT:
The rotor and armature of an electromagnetic clutch are formed with multiple regions of high magnetic reluctance defined by slots which are shaped and located such that the radial relation between the slots of the rotor and the slots of the armature changes as one member rotates relative to the other. As a result, the flux density across the air gap between the rotor and the armature varies when the armature slips relative to the rotor during initial engagement of the two. This lowers the average torque transmitted by the rotor to the armature and allows the clutch to engage gradually or with a soft-start before building up to full torque.

REFERENCES:
patent: 3019876 (1962-02-01), Rabinow
patent: 4160498 (1979-07-01), Newton et al.
patent: 4471860 (1984-09-01), Yamada
patent: 4509091 (1985-04-01), Booth
patent: 4567975 (1986-02-01), Roll
patent: 4635774 (1987-01-01), Sekiguchi et al.
patent: 4685202 (1987-08-01), Booth et al.

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