公开(公告)号：US10122165B2

公开(公告)日：2018-11-06

申请号：US14916219

申请日：2014-09-29

Applicant: Danfoss Power Electronics A/S

Inventor： Firuz Zare

IPC: H02J3/00 ,  H02M1/42 ,  H02J3/01 ,  H02M1/12 ,  H02M5/458

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 load driving circuits is provided, each drawing current from a 3-phase AC supply and driving an AC load, wherein each of said load driving circuit includes a 3-phase rectifier, with the rectifiers of the load driving circuits being controlled such that the rectification of the AC supply by the load driving circuits is staggered. In a second embodiment, a load driving circuit comprises an electronic inductor configured to control the DC link voltage and/or current such that the current drawn from the AC supply by the load driving circuit has a stepped profile. The first and second embodiments may be combined.

公开(公告)号：US20160197473A1

公开(公告)日：2016-07-07

申请号：US14916219

申请日：2014-09-29

Applicant: DANFOSS POWER ELECTRONICS A/S

Inventor： Firuz Zare

IPC: H02J3/00 ,  H02M1/12 ,  H02M5/458

CPC classification number: H02J3/00 ,  H02J3/01 ,  H02M1/12 ,  H02M1/4216 ,  H02M1/4225 ,  H02M5/458 ,  Y02B70/126 ,  Y02E40/40

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 load driving circuits is provided, each drawing current from a 3-phase AC supply and driving an AC load, wherein each of said load driving circuit includes a 3-phase rectifier, with the rectifiers of the load driving circuits being controlled such that the rectification of the AC supply by the load driving circuits is staggered. In a second embodiment, a load driving circuit comprises an electronic inductor configured to control the DC link voltage and/or current such that the current drawn from the AC supply by the load driving circuit has a stepped profile. The first and second embodiments may be combined.

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，提供多个负载驱动电路，每个从3相交流电源抽取电流并驱动交流负载，其中每个所述负载驱动电路包括三相整流器，负载的整流器 控制驱动电路使得负载驱动电路对交流电源的整流是交错的。 在第二实施例中，负载驱动电路包括被配置为控制DC链路电压和/或电流的电子电感器，使得由负载驱动电路从AC电源抽取的电流具有阶梯形轮廓。 第一和第二实施例可以组合。