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首页> 外文期刊>Power Electronics, IET >Structure and modelling of four-layer screen-returned PCB Rogowski coil with very few turns for high-bandwidth SiC current measurement
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Structure and modelling of four-layer screen-returned PCB Rogowski coil with very few turns for high-bandwidth SiC current measurement

机译：四层屏幕返回PCB rogowski线圈的结构和建模，具有很少的高带宽SiC电流测量的转弯

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摘要

Accurate measurement of current through a silicon carbide (SiC) device is especially challenging, because of its fast switching speed. Its accompanied current sensor must hence have a high-bandwidth and a high-noise immunity. It must also not interfere with operation of the device. Due to these, the printed-circuit-board (PCB) Rogowski current sensor is particularly suitable, but normally requires many layers. With only four layers, the existing Rogowski coils are not yet capable of shielding ambient voltage and magnetic noises simultaneously. Moreover, their computed and measured self-inductances are usually very different with errors as high as 45% reported in the literature. To resolve these issues, an alternative four-layer screen-returned PCB coil has been presented. The described coil uses very few turns to preserve its high bandwidth at the expense of even tougher determination of its self-inductance. An alternative piecewise modelling method has therefore been proposed for finding its self-inductance, needed for designing its theoretical bandwidth. These, together with a non-inverting integrator, permit current through an SiC device to be measured accurately, as demonstrated experimentally.
机译：由于其快速切换速度，通过碳化硅（SiC）器件的电流精确测量电流尤其具有挑战性。其伴随的电流传感器必须具有高带宽和高噪声抗扰度。它还不得干扰设备的操作。由于这些，印刷电路板（PCB）Rogowski电流传感器特别合适，但通常需要多层。只有四层，现有的Rogowski线圈尚未能够同时屏蔽环境电压和磁通。此外，它们的计算和测量的自式通常与文献中报告的45％的误差非常不同。为了解决这些问题，已经呈现了替代的四层屏幕返回的PCB线圈。所描述的线圈使用很少的转弯以保持其高带宽，以甚至更加难以确定其自电感。因此提出了一种用于设计其理论带宽所需的自电感的替代分段建模方法。这些，与非反相积分器一起，允许通过SIC器件准确地测量电流，如实验所示。

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