一种低成本的交流电压检测方案
摘要
电源设备一般需要检测交流电压有效值,针对以往检测有效值硬件电路复杂、成本高的不足,提出一种在满足精度要求前提下的低成本检测方案。首先通过电压有效值的定义推导出易于MCU处理的公式,然后给出相关硬件电路并分析其工作原理,最后通过仿真验证其可行性,给电源研发人员提供了一种参考。
Power supply equipment generally needs to detect the effective value of ac voltage.In view of the shortage of complex hardware circuit and high cost for detecting the effective value in the past,a low-cost detection scheme is proposed on the premise of satisfying the accuracy requirements.Firstly,the formula which is easy to be processed by MCU is deduced through the definition of the effective value of voltage,then the relevant hardware circuit is given and its working principle is analyzed,and the feasibility is verified by simulation,which provides a reference for power supply researchers.
Power supply equipment generally needs to detect the effective value of ac voltage.In view of the shortage of complex hardware circuit and high cost for detecting the effective value in the past,a low-cost detection scheme is proposed on the premise of satisfying the accuracy requirements.Firstly,the formula which is easy to be processed by MCU is deduced through the definition of the effective value of voltage,then the relevant hardware circuit is given and its working principle is analyzed,and the feasibility is verified by simulation,which provides a reference for power supply researchers.
引文
[1]王尧君,刘冲,蒋慧.两种测量电压有效值方法的比较[J].中国测试,2013,39(3):27-30
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[3]陈仁伟,朱长青,岳夕彪.高准确度有效值转换电路的设计与实现[J].电子测量技术,2010,33(6):20-22,26
[4]刘刚,陈树新,罗维东.电机非正弦供电电压单周期真有效值同步采样[J].电机与控制学报,2014,18(1):112-116
[5]Kampik M,Laiz H,Klonz M.Comparison of three accurate methods to measure AC voltage at low frequencies[J].IEEE Transactions on IM,2000,49(2):429-433
[2]冯俊.交流输入电压、电流监测电路设计[J].电子产品世界,2010,17(5):46-48,51
[3]陈仁伟,朱长青,岳夕彪.高准确度有效值转换电路的设计与实现[J].电子测量技术,2010,33(6):20-22,26
[4]刘刚,陈树新,罗维东.电机非正弦供电电压单周期真有效值同步采样[J].电机与控制学报,2014,18(1):112-116
[5]Kampik M,Laiz H,Klonz M.Comparison of three accurate methods to measure AC voltage at low frequencies[J].IEEE Transactions on IM,2000,49(2):429-433