北京航天万源科技有限公司，北京 100176
TN792
Beijing Aerospace Wanyuan Science&Technology Corporation, Beijing 100176, China
为了满足测量系统供配电控制设备实时监测输出电压与输出电流的需求，本文设计了一种高精度电流测量电路，该电路基于TI公司的精密电流监测计INA260芯片设计，实现了对0~36V供电范围内的0～15A持续电流实时监测和精确测量。电流测量值通过I2C接口输出，信号测量电路同数字控制电路实现电气隔离。通过大量数据测试，输出电压实测值与理论值间误差范围在0~10mV，输出电流实测值与理论值间误差范围在0~5mA。实验结果表明，该电路对0～15A内的电流测量精度和0~36V内的电压测量精度均优于1‰，实现了实时监测的功能，并提高了测量精度。
In order to meet the requirements of real-time monitoring output voltage and output current of power supply and distribution control equipment of measurement system. This paper designs a high-precision current measurement circuit, which is based on TI's precision current monitor INA260, which can realize real-time monitoring and accurate measurement of 0-15A continuous current in the 0-36V power supply range. The current measurement value is output through the I2C interface, and the signal measurement circuit is electrically isolated from the digital control circuit. Through a large number of data tests, the error range between the measured output voltage and the theoretical value is 0~10mV, and the error range between the measured output current and the theoretical value is 0~5mA. The experimental results show that the application circuit's current measurement accuracy within 0~15A and voltage measurement accuracy within 0~36V are better than 1‰, realizing the function of real-time monitoring and improving the measuring precision.
候秀林,张永乐,张锴.一种高精度电流测量电路的设计与应用[J].电子测量技术,2022,45(9):25-30
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