公开(公告)号：US20180310382A1

公开(公告)日：2018-10-25

申请号：US15496882

申请日：2017-04-25

Applicant: General Electric Company

Inventor： Zsolt BAGOLY ,  Jácint GERGELY ,  József SAMU ,  Loránd TÓTH

IPC: H05B37/02 ,  H03K5/01 ,  H05B37/03 ,  B60Q1/00 ,  H05B33/08 ,  H04B15/00

CPC classification number: H05B37/02 ,  B60Q1/0094 ,  H03K5/01 ,  H04B15/005 ,  H05B33/0815 ,  H05B37/0272 ,  H05B37/038

Abstract: A lighting system waveform shaping circuit (WSC) includes a line voltage input, a line voltage output connectable to an input voltage port of a control unit, a neutral line input connectable to a neutral line of a voltage power source, and the WSC including an impedance matching network (IMN) configured to alter an input impedance of the lighting control circuit. In one embodiment, the IMN can include a resistor in series with the line voltage input, and an actively-controlled bypass switch in parallel with the resistor. In another embodiment, the IMN can include respective ferrite chokes surrounding the input and the output voltage lines, a capacitor between the line voltage input and the neutral line input, a capacitor between the neutral line input and a protected earth ground, and a resistor in series between the neutral line input and the lighting control unit neutral line input port.