公开(公告)号：US20230134538A1

公开(公告)日：2023-05-04

申请号：US17513148

申请日：2021-10-28

Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.

Inventor： Sui Pung Cheung ,  Qing Chun Li ,  Tin Ho Li

IPC: H02M7/217 ,  H02M1/00

Abstract: The invention provides a power converter apparatus for converting an alternating current (AC) power input to a direct current (DC) power output. The apparatus comprises a plurality of n single-phase power converting circuits arranged in parallel, where n is equal to or greater than 2, wherein one of said n single-phase power converting circuits comprises a single-stage AC/DC converter module having an operating AC/DC converter; and each of a remaining n−1 of said single-phase power converting circuits comprises a two-stage converter module having an AC/DC converter as an input stage and a DC/DC transformer as an output stage.

公开(公告)号：US11043891B1

公开(公告)日：2021-06-22

申请号：US16750247

申请日：2020-01-23

Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd

Inventor： Sui Pung Cheung ,  Qing Chun Li ,  Xin Li ,  Tin Ho Li

IPC: H02M7/12 ,  H02M7/48 ,  H02M1/084 ,  H02P27/08

Abstract: Described is a controller for an AC to DC or a DC to AC multi-phase power converter of a type having N power converter phases, where N is greater or equal to 2. The controller comprises a control module configured to change or vary a phase shift angle of the input current or output current for each of the N power converter phases such that an average phase shift value for each of said N power converter phases over a control module AC line cycle is about, near or substantially the same value. In an embodiment of an AC/DC or a DC/AC multi-phase power converter of a type having N power converter phases arranged in parallel, an advantage of arranging the average phase shift value for each power converter phase to be substantially equal or about equal over an AC line cycle is that it reduces or eliminates any imbalances in the input currents or output currents of the N power converter phases. In preferred arrangements, the control module varies the phase shift angle of the input current or the output current for each of the N power converter phases over each AC line cycle using respective PWM switch control signals.

公开(公告)号：US11843322B2

公开(公告)日：2023-12-12

申请号：US17513148

申请日：2021-10-28

Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.

Inventor： Sui Pung Cheung ,  Qing Chun Li ,  Tin Ho Li

IPC: H02M7/12 ,  H02M7/217 ,  H02M1/00

CPC classification number: H02M7/2173 ,  H02M1/007

Abstract: The invention provides a power converter apparatus for converting an alternating current (AC) power input to a direct current (DC) power output. The apparatus comprises a plurality of n single-phase power converting circuits arranged in parallel, where n is equal to or greater than 2, wherein one of said n single-phase power converting circuits comprises a single-stage AC/DC converter module having an operating AC/DC converter; and each of a remaining n−1 of said single-phase power converting circuits comprises a two-stage converter module having an AC/DC converter as an input stage and a DC/DC transformer as an output stage.