基于虚拟仪器的大功率高精度电子负载

摘要

Traditional electronic load has some deficiencies such as low accuracy ,small scale range,low intelligence,etc.In order to overcome these issues ,a high-power and high-precision electronic load system was designed ,a solution for further combi-ning the high-power and the high-precision was proposed ,a man-machine interaction client-side based on virtual instrument tech-nology was developed ,and an embedded programming for the testing system was proposed .The electronic load system was designed based on LabView ,single chip microcomputer and MOSFET that ensure high testing accuracy ,large dynamic range and secondary development function .Experimental results show that the measurement accuracy of the electronic load system using our scheme can reach 0.1%with the measuring dynamic range from 0 to 240 amps and achieve high power and high precision effectively .%传统的电子负载存在测试精度低、量程范围小、测试仪的智能化程度差等问题，为了克服这一不足，设计了一个大功率高精度的电子负载系统，提出了大功率和高精度进一步结合的解决方案，开发了基于虚拟仪器技术的人机交互客户端，给出了测试系统的嵌入式程序设计。基于LabView语言、单片机和MOSFET研制出的电子负载系统具有测试精度高、量程范围大、可二次开发等特点。实验结果表明，采用该设计方法设计的电子负载系统，测试精度能够达到0．1％，量程范围为0～240 A，有效地实现了系统的大功率和高精度。