论文例子-杨桃高精度恒流源的设计与实验优秀论文.docVIP

毕 业 设 计（论 文） 题 目 高精度恒流源的设计与实验 姓 名 杨桃 学 号 1110232103 所在学院 电气与电子工程学院 专业班级 11自动职1 班 指导教师 廖冬初 日 期 2015年 6月 6 日  PAGE I 摘 要 随着电源技术的快速发展，越来越多的领域需要用到电源，如家用电器、实验室仪器设备、工农业生产设备、通信及航空所用的设备等，一切有电子设备的地方，都需要用到电源。在电子科学中，电源技术已经成为一门专业技术，即功率电子技术。 恒流电源是各类电子设备和电子线路的重要组成部分。一个高品质的恒流电源，可以使电子设备正常的工作，反之就无法保证。然而，在设计和制作恒流源时，很多工程技术人员只注重实现恒流源的术指标，却在恒流源的稳定性和可靠性方面欠佳考虑，以致其输出的电流波动很大，甚至有可能无法正常工作，这样长久的工作使电源的寿命大大降低了。故在设计时要认真考虑，使其在精度、稳定度、纹波、量程及可靠性方面具有较好的性能，这样才有更多的实用价值。 本论文的主要目的是设计并制作一种高精度恒流源，研究关于精度和稳定度的一些影响因素，以及如何消除这些影响因素。本论文通过对电路的优化、器件的选型方面对恒流源的精度进行提高。本系统是基于STM32平台设计并研制的，能够使输出电流具有较高的稳定度和高精度，而且还可以调节输出电流的大小，降低其纹波系数，使其在误差允许范围内具有较高的精度。 关键字：恒流源，运放，MCU，PID，MOSFET  PAGE III Abstract With the rapid development of power supply technology, more and more fields need to use the power supply, such as household appliances, laboratory instruments and equipment, industrial and agricultural production equipment, communications and equipment used in the aviation and so on, all electronic equipment, all need to use the power. In electronic science, power supply technology has become a professional technology, the power electronic technology. Various kinds of electronic equipment and constant current power supply is an important component of electronic circuits. A constant current power supply of high quality, can make the normal work of electronic equipment, vice cannot guarantee. However, in the design and production of constant current source, a lot of engineering and technical personnel only pay attention to the technique index to realize constant current source, but poor in stability and reliability of the constant current source, so that the output current fluctuation is very big, may even cannot work normally, such a long work makes the service life of power is greatly reduced. At design time to seriously consider, in the precision, stability, ripple, range and reliability has good performance, which has more practical va