Method of reducing the impact speed of an armature in an electro

Details Method of reducing the impact speed of an armature in an electro Method of reducing the impact speed of an armature in an electro

1996-08-12

1999-06-29

Leja, Ronald W.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

H01H 4700

Patent

active

059176920

ABSTRACT:
A method is provided for reducing an impact speed of an armature on a pole face of an electromagnet in an electro-magnetic actuator, in which the armature moves toward the pole face against a restoring spring force when the coil of the electromagnet is charged with current. The method includes limiting a voltage applied to the coil to a predeterminable maximum value as the armature approaches the pole face so that a current flowing through the coil drops for a portion of the time of the voltage limitation.

REFERENCES:
patent: 4453652 (1984-06-01), Menkel et al.
patent: 4970622 (1990-11-01), Buchl
patent: 5245501 (1993-09-01), Locher et al.
patent: 5442515 (1995-08-01), Wallaert
patent: 5546268 (1996-08-01), Hurley et al.

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