Controlled diode or body diode recovery circuit

摘要

The invention relates to a controlled diode or body diode recovery circuit which is connected in series with the diode (D1) to be recovered. The circuit includes a saturable inductor (L1) in series with the diode (D1). In parallel with the saturable inductor there is a series combination of a second inductor (L2) and a second diode (D2). The second inductor (L2) is dimensioned for a controlled rate of increase in reverse recovery current of the diode (D1) to be recovered. The second diode (D2) has its forward direction opposite to the forward direction of the diode (D1) to be recovered for allowing the flow of the reverse recovery current of the diode (D1) to be recovered. <IMAGE>