Method for operating a magnetic valve for pneumatic brake cylinders

The method involves applying a pull-in current and connecting a free-running diode with a clocked permanent current to switch the valve on, changing to a holding current after reaching the pull-in current, resulting in a clocked permanent current signal that is slowly quenched with diodes to give a...

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Bibliographische Detailangaben
Hauptverfasser:	BIEDERMANN, KLAUS, GSCHEIDLE, WOLFGANG, VAN WICKEREN, THOMAS
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL BASIC ELECTRIC ELEMENTS BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC SWITCHES ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS EMERGENCY PROTECTIVE DEVICES GENERATION INDUCTANCES MAGNETS PERFORMING OPERATIONS PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES RELAYS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES SELECTORS TRANSFORMERS TRANSPORTING VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	The method involves applying a pull-in current and connecting a free-running diode with a clocked permanent current to switch the valve on, changing to a holding current after reaching the pull-in current, resulting in a clocked permanent current signal that is slowly quenched with diodes to give a d.c. coil current with low superimposed a.c.. The switch is opened to switch the valve for rapid quenching. The valve current is monitored. The method involves applying a pull-in current for a defined period and connecting a free-running diode (22) with a clocked permanent current to switch the valve (10) on, changing to a pulse width modulated, clocked holding current after reaching the pull-in current, resulting in a clocked permanent current signal, whereby the clocked permanent current is slowly quenched with diodes to give a d.c. coil current with a low superimposed a.c. current. The switch (18) is opened to switch the valve off to enable rapid quenching. The current to the magnetic valve is monitored by a monitoring device (26). AN Independent claim is also included for the following: a control system for operating magnetic valve for pneumatic brake cylinder.