公开(公告)号：US11569649B2

公开(公告)日：2023-01-31

申请号：US17445405

申请日：2021-08-19

Applicant: DELTA ELECTRONICS, INC.

Inventor： Chun-Wei Wu ,  Chia-Ming Chang ,  Xin-Hung Lin

IPC: H02H1/00 ,  G01R31/12 ,  H01H9/50 ,  H02H3/16 ,  H02H3/10

Abstract: A signal sampling circuit for arc detection includes plural current sensors, plural high pass filter circuits, and an adder circuit. Each of the current sensors is configured to sense a measured current and then generate a sensed voltage signal. One of the high pass filter circuits receives the sensed voltage signal from one of the current sensors and performs high-pass filtering on the sensed voltage signal. The adder circuit performs scaling up, adding, and DC offset on the high-pass filtered sensed voltage signals. Each of the high pass filter circuits is composed of a filter capacitor and a first resistor connected in series with the filter capacitor. The adder circuit is composed of the first resistors, a first operational amplifier, and a second resistor.

公开(公告)号：US20220140593A1

公开(公告)日：2022-05-05

申请号：US17445405

申请日：2021-08-19

Applicant: DELTA ELECTRONICS, INC.

Inventor： Chun-Wei Wu ,  Chia-Ming Chang ,  Xin-Hung Lin

IPC: H02H1/00 ,  G01R31/12

Abstract: A signal sampling circuit for arc detection includes plural current sensors, plural high pass filter circuits, and an adder circuit. Each of the current sensors is configured to sense a measured current and then generate a sensed voltage signal. One of the high pass filter circuits receives the sensed voltage signal from one of the current sensors and performs high-pass filtering on the sensed voltage signal. The adder circuit performs scaling up, adding, and DC offset on the high-pass filtered sensed voltage signals. Each of the high pass filter circuits is composed of a filter capacitor and a first resistor connected in series with the filter capacitor. The adder circuit is composed of the first resistors, a first operational amplifier, and a second resistor.