Method and apparatus for reducing the switching noise of an...

Details Method and apparatus for reducing the switching noise of an... Method and apparatus for reducing the switching noise of an...

2006-10-03

2006-10-03

Leja, Ronald (Department: 2836)

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

C361S152000

Reexamination Certificate

active

07116541

ABSTRACT:
In order to achieve a reduction in the switching noise during operation of an electromagnetic switching device with little complexity, a coil for moving an armature with moving switching contacts is driven in order to make contact at a first minimum value of a supply voltage. The supply voltage is then increased from the first minimum value to a second minimum value as a function of time, such that the moving switching contacts can be moved with the stationary switching contacts into sufficient mutual contact with pressure applied.

REFERENCES:
patent: 3961688 (1976-06-01), Maynard
patent: 5406440 (1995-04-01), Wieloch
patent: 5907252 (1999-05-01), Hayakawa et al.
patent: 6598621 (2003-07-01), Wygnanski
patent: 35 04 034 (1986-08-01), None
patent: 19609608 (1997-09-01), None
patent: 19983970 (2002-06-01), None
patent: 01/04922 (1999-12-01), None
German Office Action issued on Aug. 14, 2002.

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