公开(公告)号：US20170040905A1

公开(公告)日：2017-02-09

申请号：US15118149

申请日：2015-02-10

Applicant: Danfoss Power Electronics A/S

Inventor： Firuz ZARE

IPC: H02M5/45 ,  H02M1/12

CPC classification number: H02M5/45 ,  H02M1/12 ,  H02M1/4216 ,  H02M1/4225 ,  H02M5/4585 ,  H02M7/23 ,  H02M2001/007 ,  H02M2001/4283 ,  H02M2003/1586 ,  H02M2007/2195 ,  Y02B70/126 ,  Y02B70/1408

Abstract: The present invention provides systems and methods for reducing harmonics, for example when using an AC to AC converter to drive a load such as a motor drive. In a first embodiment, a plurality of AC/DC converter stages are connected in parallel between a 3-phase AC supply and a DC link, each of said AC/DC stages including a 3-phase rectifier, with the rectifiers of the load driving circuits being configured such that the rectification of the AC supply by the load driving circuits is staggered. Blocking diodes are used to prevent current circulation from one rectifier to another.

Abstract translation: 本发明提供了用于降低谐波的系统和方法，例如当使用AC至AC转换器来驱动诸如电机驱动器的负载时。 在第一实施例中，多个AC / DC转换器级并联连接在三相AC电源和DC链路之间，每个所述AC / DC级包括三相整流器，负载驱动的整流器 电路被配置为使得由负载驱动电路对AC电源的整流是交错的。 阻塞二极管用于防止从一个整流器到另一个整流器的电流循环。