Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1998-01-02
1999-02-09
Gaffin, Jeffrey
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
361154, 361160, 361143, 361194, H01H 4700
Patent
active
058702709
ABSTRACT:
A non-burnout controller for a switching coil is disclosed. The controller has a pulse timer, a relay switch, and an actuation switch. After being reset and actuated, the pulse timer defines a pulse having a predetermined pulse period. The relay switch has a switch actuation input for receiving the pulse and first and second switch outputs for being electrically coupled to first and second taps of the switching coil. The relay switch places a switching voltage across the outputs during the pulse period such that the switching coil has a switching current running therethrough. The relay switch places a substantially zero voltage across the outputs before and after the pulse period such that the switching coil has substantially no switching current running therethrough. The actuation switch has first and second positions. Upon being changed to the first position, the actuation switch resets the timer, whereby the switching coil has substantially no current running therethrough. Upon being changed to the second position, the actuation switch actuates the timer to define the pulse and issues the pulse to the switch actuation input of the relay switch, whereby during the pulse period the switching coil has the switching current running therethrough, and after the pulse period the switching coil has substantially no current running therethrough. The predetermined period od the pulse prevents switching coil burnout.
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Leung Kwok-Wah
Riley H. Lee
Bachmann Industries, Inc.
Gaffin Jeffrey
Huynh Kim N.
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