Patent ID: 11933820
Assignee: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A current detection system comprising:
a printed circuit board, wherein N Rogowski coils are mounted on the printed circuit board;
N groups of amplification apparatuses, wherein each of the N groups of amplification apparatuses comprises at least one amplification apparatus, and N is a positive integer greater than or equal to 1;
wherein the nth Rogowski coil in the N Rogowski coils is capable of being mounted concentric with the nth current-carrying conductor in N current-carrying conductors, and the nth current-carrying conductor is perpendicular to a plane of the nth Rogowski coil, n=1, . . . , N;
wherein an output end of the nth Rogowski coil is connected to an input end of a first amplification apparatus in the nth group of amplification apparatuses in the N groups of amplification apparatuses;
wherein the first amplification apparatus comprises an amplifier circuit and an active inductance circuit, and an output end of the amplifier circuit is connected to an input end of the active inductance circuit;
wherein the amplifier circuit is configured to:
amplify an obtained input signal, and output a first output signal, the first output signal comprises a first direct current signal and an amplified input signal, the first direct current signal is a direct current signal generated by the amplifier circuit, the input signal comprises an alternating current signal, and the amplified input signal comprises an amplified alternating current signal; and
the active inductance circuit is configured to: obtain the first output signal, perform direct current component suppression processing on the first output signal, and output a second output signal, wherein the second output signal comprises a second direct current signal and an amplified alternating current signal, the second direct current signal is a direct current signal generated by the active inductance current, and the second direct current signal is weaker than the first direct current signal.