公开(公告)号：US20140246913A1

公开(公告)日：2014-09-04

申请号：US14195063

申请日：2014-03-03

Applicant: Control Techniques Limited

Inventor： Frank Weiner Heerdt

IPC: H02M1/12

CPC classification number: H02M7/49 ,  H02M5/458 ,  H02M7/487 ,  Y10T307/696

Abstract: A circuit for an electrical load comprises a passive transformer, the secondary of which is connected to power cells for each phase according to the transformer tappings. Each power cell comprises a low cost but efficient power factor correction circuit to produce lower harmonics on the transformer.

Abstract translation: 用于电负载的电路包括无源变压器，根据变压器接头，其被辅助连接到每相的功率单元。 每个功率单元包括低成本但有效的功率因数校正电路，以在变压器上产生较低的谐波。

公开(公告)号：US09337640B2

公开(公告)日：2016-05-10

申请号：US14180803

申请日：2014-02-14

Applicant: Control Techniques Limited

Inventor： Frank Weiner Heerdt

IPC: H02H1/00 ,  H02H9/04

CPC classification number: H02H1/0015 ,  H02H9/042

Abstract: A voltage measurement is made between two points in a circuit. If the measured voltage exceeds a predetermined amount, a switch is operated to electrically connect the two points.

Abstract translation: 在电路中的两点之间进行电压测量。 如果测量电压超过预定量，则操作开关以电连接两点。

公开(公告)号：US20140233136A1

公开(公告)日：2014-08-21

申请号：US14180803

申请日：2014-02-14

Applicant: Control Techniques Limited

Inventor： Frank Weiner Heerdt

IPC: H02H1/00

CPC classification number: H02H1/0015 ,  H02H9/042

Abstract: A voltage measurement is made between two points in a circuit. If the measured voltage exceeds a predetermined amount, a switch is operated to electrically connect the two points.

Abstract translation: 在电路中的两点之间进行电压测量。 如果测量电压超过预定量，则操作开关以电连接两点。

公开(公告)号：US09762141B2

公开(公告)日：2017-09-12

申请号：US14195063

申请日：2014-03-03

Applicant: Control Techniques Limited

Inventor： Frank Weiner Heerdt

IPC: H02M1/12 ,  H02M7/49 ,  H02M5/458 ,  H02M7/487

CPC classification number: H02M7/49 ,  H02M5/458 ,  H02M7/487 ,  Y10T307/696

Abstract: A circuit for an electrical load comprises a passive transformer, the secondary of which is connected to power cells for each phase according to the transformer tappings. Each power cell comprises a low cost but efficient power factor correction circuit to produce lower harmonics on the transformer.