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Design and fabrication of a 300A class general-purpose current sensor
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 Title & Authors
Design and fabrication of a 300A class general-purpose current sensor
Park, Ju-Gyeong; Cha, Guee-Soo; Ku, Myung-Hwan;
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Current sensors are used widely in the fields of current control, monitoring, and measuring. They have become more popular with the increasing demand for smart grids in a power network, generation of renewable energy, electric cars, and hybrid cars. Although open loop Hall effect current sensors have merits, such as low cost, small size, and weight, they have low accuracy. This paper describes the design and fabrication of a 300A open loop current sensor that has high accuracy and temperature performance. The core of the current sensor was calculated numerically and the signal conditioning circuits were designed using circuit analysis software. The characteristics of the manufactured open loop current sensor of 300 A class was measured at currents up to 300 A. According to the test of the current sensor, the accuracy error and linearity error were 0.75% and 0.19%, respectively. When the temperature compensation was carried out with the relevant circuit, the temperature coefficients were less than at temperatures between and .
Accuracy error;Current sensor;Hall effect;Linearity error;Temperature compensation;
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