Method and a device for operating an electro-magnet on an...

Details Method and a device for operating an electro-magnet on an... Method and a device for operating an electro-magnet on an...

2006-01-10

2006-01-10

Barrera, Ramon M. (Department: 2832)

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

C361S153000, C361S154000, C361S186000, C361S187000, C361S194000, C251S129010, C251S129020, C251S129150

Reexamination Certificate

active

06985345

ABSTRACT:
The present invention relates to a method for operation of an electro-magnet (2, 3) connected to an intrinsically safe direct current circuit which can be switched under control between two positions for the operation of the closing body of a hydraulic valve (5, 6), whereby using of an electronic control unit, the coil windings of the electro-magnet (2, 3) are taken in the pull-in phase of the armature of the electro-magnet to an exciting current and in the retaining phase of the armature to a lower retaining current as opposed to the excitating current, and a device with which the retaining current reduction is realized.

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