公开(公告)号：US20170264248A1

公开(公告)日：2017-09-14

申请号：US15510392

申请日：2015-09-10

Applicant: General Electric Company

Inventor： Ying MEI ,  Pengcheng ZHU ,  Juan Antonio SABATE ,  Song CHI ,  Ruxi WANG ,  Jianguo XIAO

IPC: H03F1/26 ,  H03F1/30 ,  G01R33/385 ,  H03F3/217

CPC classification number: H03F1/26 ,  G01R33/3852 ,  H03F1/303 ,  H03F1/523 ,  H03F3/2171 ,  H03F3/2173 ,  H03F2200/351 ,  H03K17/133

Abstract: A switching amplifier includes a plurality of cascade elements, each bridge circuit includes an inductive load coupled between a first leg terminal of one of the at least two leg circuits and a second leg terminal of another one of the at least two leg circuits. A first leg voltage of the first leg terminal have a phase shift relative to a second leg voltage of the second leg terminal, the phase shift is used for causing the inductive load to store electric energy and generating a minimum circulating current—I min or I min sufficient to effect conducting of a corresponding diode; each of the switches is configured to be turned on if the corresponding diode conducts current to effect zero voltage switching of the corresponding switch. The minimum circulating current—I min or I min is equal to a constant value.