Open-close type annular PCB type pulse large current sensor

Abstract

The invention provides an open-close type annular PCB type pulse high-current sensor, and particularly relates to a current sensor for measuring millisecond-level high-power pulse current. According to the design of the open-close type annular PCB type pulse large-current sensor, a complete coil structure is formed by splicing two semi-rings, so that the purpose of convenient disassembly and assembly is achieved; wherein the upper surface layer and the lower surface layer of the multi-layer PCB are grid copper-clad shielding layers and are used for inhibiting rapid changing strong electromagnetic interference; the middle layers of the multi-layer PCB are PCB type magnetic induction coils, comprise coil upper layers, coil middle layers and coil lower layers, and are used for sensing the magnetic field change of the conductor to be detected. The two semi-annular PCBs are installed on a to-be-detected conductor in a surrounding mode to form an annular PCB type magnetic induction coil, the change of the magnetic flux density of the to-be-detected conductor can be detected, and induced electromotive force in direct proportion to the change rate of detected current along with time is generated. The output voltage of the coil is connected to an integrator through a coaxial cable, and a to-be-measured current signal can be obtained through integration.

Description

technical field [0001] The invention belongs to the technical field of high-power pulse power supply testing, and in particular relates to an open-close ring PCB type pulse high-current sensor. Background technique [0002] In the high-power pulse power supply test technology, it is necessary to measure the output pulse current to judge its working performance. This pulse current has a large current peak value (up to tens of kiloamperes to hundreds of kiloamperes, or even megaamperes), a very rapid rise time (tens of microseconds or hundreds of microseconds), and an extremely short action time (main pulse width only a few milliseconds). Rogowski coils, which measure current signals based on the principle of electromagnetic induction, are currently the most widely used transient current measurement sensors in large current detection. However, some specific compact pulse power supplies do not have enough space to install ordinary commercial Rogowski coils due to their very c...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a split ring PCB type pulse high current sensor, which makes full use of the gap of the detected part to design its structure and size, so as to solve the problem that ordinary commercial Rogowski coils cannot be installed inside the compact pulse power supply

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