Patent ID: 7102253
Filing Date: 2006-09-05
Classification: H02M,H03K

Abstract:
1. A MOSFET based, high voltage, high current AC electronic relay operating with normally closed contacts, comprising: at least one power MOSFET switching circuit selectively switching between switch conducting and switch isolation, the power MOSFET switching circuit being normally closed and including a plurality of inputs controlling the operation thereof; a driving circuit being connected to the power MOSFET switching circuit via at least one rectifier coupled to the plurality of inputs such that a voltage differential exists between any two inputs of the power MOSFET switching circuit provide a voltage source maintaining the power MOSFET switching circuit normally closed; a control circuit linked to and controlling operation of the power MOSFET switching circuit; and a first transformer coupled to the power MOSFET switching circuit, the first transformer selectively applying a predetermined first voltage to the power MOSFET switching circuit which establishes the power MOSFET switching circuit in switch conducting; and a second transformer coupled to the power MOSFET switching circuit, the second transformer selectively applying a predetermined second voltage to the power MOSFET switching circuit which establishes the power MOSFET switching circuit in switch isolation in an expedited manner; and wherein the control circuit is linked to and controls the operation of the first and second transformers.