宋文涛,朱才溢.基于负反馈的变压器多直流参考电压传递技术研究[J].电测与仪表,2021,58(8):73-82. Song Wentao,Zhu Caiyi.Research on multiple DC Reference voltages transfer technology utilizing transformer based on negative feedback system[J].Electrical Measurement & Instrumentation,2021,58(8):73-82.
基于负反馈的变压器多直流参考电压传递技术研究
Research on multiple DC Reference voltages transfer technology utilizing transformer based on negative feedback system
During the research and design of modern instruments, it is necessary to solve the problem of obtaining multiple reference DC voltages in a more economical, simple and easy to integrate way to ensure their high accuracy. This paper proposed a DC constant voltage transfer method using transformer and which based on square wave modulation and demodulation. Based on this theoretical method, a multiple DC reference voltages transfer scheme utilizing transformer is proposed. The negative feedback system periodic re-calibration technology and capacitance oscillation characteristics are used to further control and reduce the transmission misalignment error and maintain system stability. A subsidiary supporting circuit module is designed to realize multiple DC reference voltages transfer by utilizing transformer, and the output multiple reference DC voltages are calibrated and analyzed. The transmission errors of all the transmitted benchmark voltages of the design is superior to 5×10-6. The circuit model’s extended measurement uncertainty is evaluated, which of all the selected transfer calibration points within the range of 1×10-6, in accordance with the design expectation, which verifies the correct feasibility of the method and has significant application and popularization value.
