Bistable electromagnetic actuator, control circuit of an electromagnetic actuator with double coil and electro-magnetic actuator with double coil comprising one such control circuit

摘要

#$%^&*AU2011202213B220111103.pdf#####ABSTRACT A control circuit for an electromagnetic actuator with a plunger core, the circuit includes at least a first closing control coil designed to move the plunger core in a closing phase of the actuator, and at least a second opening control coil designed 5 to move the magnetic core in an opening phase of the actuator, wherein the two or more control coils are coupled by mutual induction. The control circuit also includes a power supply circuit designed to supply power to said control coils in the closing and opening phases, wherein the control circuit includes at least a first trigger capacitor, and the power supply circuit including switching means. The 10 switching means in designed to connect said at least first trigger capacitor in series with said second opening control coil, said at least first trigger capacitor being charged by an induced voltage at the terminals of said at least second opening control coil when a closing voltage is applied to the terminals of said at least first closing control coil, and to connect said at least first trigger capacitor to 15 the second opening control coil, said at least first trigger capacitor being discharged via said second opening control coil to develop an opening voltage at the terminals of said coil during the opening phase.