公开(公告)号：US20180216621A1

公开(公告)日：2018-08-02

申请号：US15939715

申请日：2018-03-29

Applicant: Pentair Water Pool and Spa, Inc. ,  Danfoss Power Electronics A/S

Inventor： Robert W. Stiles, JR. ,  Lars Hoffmann Berthelsen ,  Ronald B. Robol ,  Christopher R. Yahnker ,  Einar Kjartan Runarsson

IPC: F04D15/00 ,  F04D13/06 ,  F04D1/00 ,  F04B49/20 ,  E04H4/12

CPC classification number: F04D15/0066 ,  E04H4/1245 ,  F04B49/20 ,  F04D1/00 ,  F04D13/06

Abstract: A method of operating a pumping system for an aquatic application based upon performance of multiple water operations is disclosed. The method includes providing a pump and a motor coupled to the pump, and a controller including a variable speed drive that is in communication with the motor. The method also includes: operating the motor in accordance with a first water operation, wherein the first water operation includes a first start time, end time, and water flow rate: operating the motor in accordance with a second water operation, wherein the second water operation includes a second start time, end time, and water flow rate; and altering the first water operation in response to performance of the second water operation.

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。

公开(公告)号：US20150177328A1

公开(公告)日：2015-06-25

申请号：US14420004

申请日：2013-07-11

Applicant: Danfoss Power Electronics A/S

Inventor： Michael Harke

IPC: G01R31/34 ,  G01R31/28 ,  G01R19/00 ,  G01R27/14 ,  G01R27/26

CPC classification number: G01R31/343 ,  G01R19/0084 ,  G01R19/0092 ,  G01R27/14 ,  G01R27/2611 ,  G01R31/2837 ,  H02P23/14 ,  H02P2207/01

Abstract: A method of determining electromagnetic characteristics of an asynchronous motor system is described. A DC sequence is applied comprising DC vectors applied to different phases of the motor in tum. An AC sequence is also applied to different phases of the motor, the AC sequence including pulses having different DC offsets being applied to different phases of the motor. The DC and AC pulses are applied such that any torque generated is minimized. The data obtained is used to calculate the stator and rotor resistances of the motor, the non-linearity of an inverter of the motor system and the nominal stator transient and magnetizing inductances of the motor.

Abstract translation: 描述了一种确定异步电动机系统的电磁特性的方法。 施加DC序列，其包括施加到电动机的不同相位的DC矢量。 AC序列也适用于电动机的不同相，包括具有不同DC偏移的脉冲的AC序列被施加到电动机的不同相。 施加DC和AC脉冲，使得产生的任何扭矩被最小化。 获得的数据用于计算电机的定子和转子电阻，电机系统的逆变器的非线性以及电动机的额定定子瞬变和励磁电感。