Method for operating a replay arrangement to reduce noise due to

Details Method for operating a replay arrangement to reduce noise due to Method for operating a replay arrangement to reduce noise due to

1998-03-20

1999-09-14

Gaffin, Jeffrey

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361189, H01H 4700

Patent

active

059531975

ABSTRACT:
A method is described for operating a relay arrangement having a magnetic circuit comprising two excitation core each arranged on a core, a yoke and an unstably mounted armature, two contact springs that can be operated by the unstably mounted armature, two make contacts, two changeover contacts and a common break contact. In the normal state of the relay arrangement, the two changeover contacts are connected to the common break contact and when the response threshold of the relay arrangement is reached one of the two changeover contacts is connected to the corresponding make contact. The magnetic circuit is excited electromagnetically in the normal state of the relay arrangement in order to generate a normal-state armature force that acts on the unstably mounted armature. The electromagnetic excitation is generated by means of a normal-state excitation current through one of the two excitation coils the current intensity of which is selected such that the normal-state armature force is lower than that which occurs at the response threshold of the relay arrangement.

REFERENCES:
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patent: 4922363 (1990-05-01), Long et al.
patent: 5202813 (1993-04-01), Uota et al.
patent: 5224014 (1993-06-01), Fowler et al.
patent: 5267120 (1993-11-01), Graff et al.
patent: 5539608 (1996-07-01), Hurley et al.
patent: 5687050 (1997-11-01), Bartsch
patent: 5774323 (1998-07-01), Innes et al.

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