In recent years, new energy vehicles, photovoltaic power stations, communication base stations, energy storage systems, and other power electronic systems have developed rapidly. The development of these systems has the trend of continuously increasing the power density per unit area, reducing the system volume, and continuously increasing using the busbars. More and more new current sensors will be used in these systems and play a key role. Traditional current sensor cannot meet the development trend of power electronic systems due to their large size and high cost. In this paper, a new small coreless tunnel junction magnetoresistance (TMR) busbar dc current sensor adopted differential scheme which improves the sensor’s anti-interference ability that is designed. The current sensor adopts an open-closed structure for easy nonintrusive installation. Four TMRs which adopted differential structure are placed on the edges of the busbar. The peak current measurement range is ±600 A, the rated current measurement range is ±300 A, and the supply voltage is 5 V.

中文翻译：

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TMR母线直流电流传感器的非侵入式安装

近年来，新能源汽车，光伏电站，通信基站，储能系统和其他电力电子系统得到了快速发展。这些系统的发展趋势是不断增加单位面积的功率密度，减小系统体积，并使用母线不断增加。这些系统中将使用越来越多的新型电流传感器，并且将发挥关键作用。传统的电流传感器由于其体积大，成本高而不能满足电力电子系统的发展趋势。本文提出的新型小型无芯隧道结磁阻（TMR）母线直流电流传感器采用差分方案，提高了传感器的抗干扰能力。电流传感器采用开闭结构，易于非侵入式安装。四个采用差动结构的TMR放置在母线的边缘。峰值电流测量范围为±600 A，额定电流测量范围为±300 A，电源电压为5V。