METHOD AND DEVICE TO CONTROL CONDITION OF ELECTRONIC KEY Russian patent published in 2014 - IPC H02M1/08 

FIELD: electricity.

SUBSTANCE: in the method to control condition of an electronic key made in accordance with the technology MOSFET/IGBT of transistors, by means of sending an AC signal to a drain-source via a diode bridge from the secondary winding of the transformer, by consumption current and the shape of signal in the primary circuit of the transformer. To realise the method of control of the open-closed condition of electronic keys, a device is provided, made of two serially connected MOSFET/IGBT transistors, forming an electronic switchboard of AC current, where accordingly sources and gates of transistors are combined, drains - inlet and outlet of the switchboard, at the same time the drain-source of each transistor are connected accordingly with units of cathodes and anodes of appropriate diodes according to the bridge circuit, the remaining symmetrical points of diode bridges are connected with he outlet winding of the appropriate isolating transformer and serially with the one connected outlet of the outlet windings of transformers of limiting resistors, and also primary windings of transformers, connected to the common generator of AC voltage via appropriate current sensors.

EFFECT: improved reliability.

2 cl, 1 dwg