Method of regulating the armature impact speed in an electromagn

Details Method of regulating the armature impact speed in an electromagn Method of regulating the armature impact speed in an electromagn

1999-02-24

2000-10-31

Sherry, Michael

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Systems for magnetizing, demagnetizing, or controlling the...

361160, H01H 4704

Patent

active

061412015

ABSTRACT:
A method of regulating an electromagnetic actuator is disclosed. The electromagnetic actuator has an electromagnet; an armature movable, in a switching step, by a controlled current supply to said magnet coil, from a first armature position to a second, pole face-engaging armature position against a force of a resetting spring. The method includes the following steps for regulating the current flow through the magnet coil to set a low velocity of the armature as it arrives at the pole face: during the switching step, detecting the energy amount in the electromagnetic actuator by detecting a changing armature position and/or a changing armature velocity; estimating by extrapolation the expected energy amount upon arrival of the armature on the pole face; and forming a coarse correcting value by comparing the estimation to be extrapolated with a predetermined target value selected with an aid of the total energy stored in the system in the second armature position.

REFERENCES:
patent: 4720763 (1988-01-01), Bauer
patent: 5784244 (1999-05-01), Moran et al.
patent: 5905625 (1999-05-01), Schebitz

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