公开(公告)号：EP0194574A3

公开(公告)日：1988-06-01

申请号：EP86102910

申请日：1986-03-05

Applicant: KOLLMORGEN TECHNOLOGIES CORPORATION

Inventor： Whited, James S.

IPC: H02J03/18

CPC classification number: H02J3/1864 ,  Y02E40/12 ,  Y02P80/112 ,  Y10S323/91

Abstract: In an apparatus for controlling the power factor of a power distribution system connected to inductive loads, banks of delta connected capacitors are added to or removed from the power lines of the power distribution system by a plurality of solid state switching devices which are under the control of a microprocessor. The solid state switching devices include optically isolated SCR devices that do not generate electrical interference and provide transient free operation. The microprocessor is also capable of calculating the power factor and displaying it on a digital readout.