公开(公告)号：US3731183A

公开(公告)日：1973-05-01

申请号：US3731183D

申请日：1971-09-29

Applicant: INDUCTOTHERM CORP

Inventor： JOHNSON A ,  HERRMAN R

IPC: G05F1/70 ,  G05F1/455 ,  H02J3/18 ,  H02P13/16 ,  H02M5/22

CPC classification number: H02J3/1828 ,  G05F1/455 ,  Y02E40/30

Abstract: Apparatus for controlling power and for compensating for a low power factor due to a relatively large varying inductive load. A number of branches having an inverse parallel connected pair of thyristors and a capacitor connected in series are connected in parallel. These parallel branches are connected in series between an alternating current source and the load. At least one thyristor of one of the inverse parallel connected pairs of thyristors is gated on at some time during each half cycle of the alternating current supply voltage in order to control the power flow to the load. One thyristor of one or more of the inverse parallel pairs of thyristors is gated on at appropriate times during each half cycle in order to place one or more of the capacitors, which are in parallel with each other, in series between the source and the load.

Abstract translation: 用于控制功率并由于相对大的变化感性负载而补偿低功率因数的装置。 并联连接多个具有逆并联的晶闸管和串联连接的电容器的分支。 这些并联支路串联连接在交流电源和负载之间。 在交流电源电压的每个半周期期间的某个时间，至少一个逆并联的晶闸管之一的晶闸管被选通，以便控制到负载的功率流。 一个或多个逆并联的晶闸管的一个晶闸管在每个半周期期间的适当时间门控，以将一个或多个彼此并联的电容器放置在源极和负载之间 。