毕业论文-数控直流电流源设计..doc

摘 要 在电子设备中经常用到稳定性好、精度高、输出可预置的直流电流源。随着电子技术的不断进步，对电子仪器的要求也不断提高。电源作为电路的动力源泉更是扮演着越来越重要的角色，不论是学校实验室还是维修中心都离不开实验电流源，然而传统的电流源不论是在控制精度还是输出特性上都无法满足要求。 该电流源具有设定准确、输出电流稳定、可调范围全程线性等特点。随着单片机技术的不断发展和D/A，A/D技术的不断成熟使得数控电源成为可能，数控电流源不论是在控制精度还是在可操作性上都有传统电源无法比拟的优势。 此设计在参考传统电流源以及普通数控电流源的基础上，在充分考虑性价比的同时极大地提高了数控电流源的准确性，通过软件修正以后在使用普通元件的情况下数控电流源的性能也达到了比较高的水平。 关键字：高精度；D/A转换； 电流源； 软件修正 DC Current Source Design NC 朗读 显示对应的拉丁字符的拼音 Often used in electronic equipment in good stability, high accuracy, output preset dc current source. Progress unremittingly the request to the electronics instrument technically to also raise continuously along with the electronics, the power supply is the motive source of the electric circuit to play a more and more important role more, is the school a laboratory still repair centerses to all can not get away from an experiment power supply in spite of, however the traditional power supply is control accuracy or output the tops of the characteristic in spite of and cant satisfy a request. This direct current source not only can steadily output, but also can be accurately initialized, and adjusted linearly at a wide range.Along with single slice machine technical of develop continuously with the D/A, the A/D is technical continuously the maturity make the number control power supply to make possible, count to control the electric current source and is control accuracy in spite of still on the maneuverability all there is traditional power supply cant compare to of advantage. This design in making reference to the foundation that the traditional electric current source and common number control the electric current source, at the full consideration price compare of in the meantime raised a number to control the accuracy of the electric current source biggest, pass the software correction hereafter while use the circumstance of the common component the number controls the electric current source of the function also comes to a higher level.