[1]王博.可抗共模干扰的直流分量检测电路[J].工业仪表与自动化装置,2020,(04):81-84.[doi:1000-0682(2020)04-0000-00]
　WANG Bo.A DC bias detection circuit with common mode interference resistance[J].Industrial Instrumentation & Automation,2020,(04):81-84.[doi:1000-0682(2020)04-0000-00]
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可抗共模干扰的直流分量检测电路

《工业仪表与自动化装置》[ISSN:1000-0682/CN:61-1121/TH]

Title:: A DC bias detection circuit with common mode interference resistance

Author(s):: WANG Bo; School of Traction Power, Xi’an Railway Vocational & Technical Institute, Xi’an 710014, China

Keywords:: inverter; DC bias; low pass filter; voltage follower; common-mode interference

摘要:: 为了精准采集逆变器交流输出电压直流分量，使其具有较强的抗共模电磁干扰能力，该文提出了一种交流电压直流分量采集电路。该电路由低通滤波、阻抗匹配及隔离、直流偏置的调理及放大等3部分组成，在共模电磁干扰严重的系统中仍然可以保证较高的精度，从而有效抑制直流偏置电压。通过仿真手段及10 kVA的UPS实验平台验证，该电路对于直流分量的采集精度较常用的采集电路有明显优势，并且具有显著的抗共模干扰特性。实验结果表明，所提出的直流分量采集电路科学、可行。

Abstract:: In order to accurately detect the DC bias voltage of the inverter AC output and make it have strong ability to resist common-mode electromagnetic interference, an AC voltage DC bias acquisition circuit is proposed, the circuit consists of three parts: low-pass filter, impedance matching and isolation, DC bias adjustment and amplification, it can still guarantee high accuracy in the system with serious common-mode electromagnetic interference, thus effectively suppressing DC bias voltage. The circuit is verified by simulation and the 10 kVA UPS experimental platform, the acquisition accuracy of the DC bias is obviously superior to the commonly used acquisition circuit, and it has significant characteristics of resisting common-mode interference. The experimental results show that the proposed DC bias acquisition circuit is scientific and feasible.

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备注/Memo:: 收稿日期：2019-12-05
基金项目：陕西省教育厅2019年度专项科学研究计划(19JK0693)
作者简介：王博（1983），男，陕西蒲城人，硕士，讲师，研究方向为逆变技术、DC-DC谐振变换技术、宽禁带半导体器件应用技术等。

更新日期/Last Update: 1900-01-01