脉冲调宽乘法器在交流应用下的误差及标准功率、电压、电流测量仪的研制  

Errors of PWMM for AC Measuring and Research on Standard Power, Voltage, Current Measuring Instrument

作　　者：江海鹰[1] 尤德斐[2] 汪伟[2] 杜吉全 

机构地区：[1]山东建材学院 [2]中国计量学院

出　　处：《计量学报》1997年第1期50-56,62,共8页Acta Metrologica Sinica

摘　　要：本文讨论了脉冲调宽乘法器用于交流测量时交直流变换误差与时分割频率的关系，提出了一种新的准确计算方法，并对相移误差等因素作了分析，给出了减小误差的措施。最后介绍了基于上述分析而设计研制的标准功率、电压、电流测量仪，其测量功率、电压、电流的误差均小于００１％The relationship between the AC/DC transfer errors and the time division frequency when PWMM is applied to AC measurement is discussed in this paper. A new method of accurate calculation of errors is proposed and the factors of phase error ect. are analysed. The ways of reducing errors are also proposed. the design of the standard power, voltage, current measuring instrument based on above principles is introduced. The errors of the AC power, voltage, current measuring instrument are less than 0.01%.

关 键 词：脉冲调宽乘法器 标准功率电 电流测量仪 

分 类 号：TN78[电子电信—电路与系统]