Patent ID: 7643266
Filing Date: 2010-01-05
Classification: H01F

Abstract:
1. A trigger circuit for an electromagnetic actuator, comprising an energy storage arranged in the vicinity of said actuator, wherein the energy storage comprises a controlled DC current or voltage source with a limited output, said energy storage being connected with a remotely disposed supply source via supply lines, at least one thyristor having an anode, a cathode and a gate and defining, together with said actuator, a first series circuit, and a sensor responding to danger situations, wherein said sensor, together with at least one resistor, defines a second series circuit arranged in parallel to said first series circuit, and a tap of said second series circuit is connected with said gate of said thyristor, wherein the at least one resistor connects the anode and the gate of the thyristor, and wherein the sensor in case of sensing a danger situation, opens the second series circuit.