Patent ID: 7606051
Filing Date: 2009-10-20
Classification: H02M,Y02B

Abstract:
1. A fully clamped coupled inductor power conversion circuit formed by applying an improvement method to a unclamped coupled inductor power conversion circuit, wherein said unclamped coupled inductor power conversion circuit has at least two operating states, and wherein said unclamped coupled inductor power conversion circuit comprises at least a first coupled inductor having at least a first winding and a second winding, an inductance connected in series with said first coupled inductor, and a first switch means, wherein at least one of said windings of said first coupled inductor is unclamped in at least one of said operating states of said unclamped coupled inductor power conversion circuit, said improvement method comprising the following steps, Step (1): adding an active clamp network such that said active clamp network is coupled to said unclamped winding of said first coupled inductor, said active clamp network comprising, Step (2): repeating step (1) for each of said windings and each of said operating states of said unclamped coupled inductor power conversion circuit until all of said windings of said coupled inductor are clamped during all of said operating states, whereby said fully clamped coupled inductor power conversion circuit becomes fully clamped by application of said improvement method to said unclamped coupled inductor power conversion circuit thereby eliminating ringing and over shoot associated with said inductance.