【精品论文】直流电机负载下的开关电源控制问题研究.docVIP

本科毕业设计 题 目 直流电机负载下的开关电源控制问题研究 学 院 自动化学院 专 业 电气工程与自动化 班 级 学 号 学生姓名 指导教师 完成日期  摘要 本课题主要研究一种能适于反电势负载的AC/DC开关电源的控制方法。 虽然开关电源技术发展迅速，但是针对开关电源给电机类负载的供电问题，国内外暂无有效的解决方案。因为电动机的起动、制动电流往往高过其额定值的许多倍，使得开关电源给相应功率的电机类负载供电时常因过电流保护关机而无法工作、或需要大幅降额使用而造成极大浪费。为解决以上问题，探讨一种适于直流电动机负载的新型开关电源系统方案。 本文首先提出系统的总体方案，对其可行性进行了分析，然后建立了该系统对象的数学模型，研究综合控制算法，其中电压环（AVR）采用ID调节器整定成典型型系统，电流环（ACR）采用PI调节器整定成典型型系统，再用Matlab仿真分析，并与传统的稳压控制进行比较，系统仿真得到了较好的电压、电流波形曲线，实现了最大动态电流的约束控制和稳压控制的目的，最后设计电源控制器，包括电源控制器的总体结构框图，硬件电路设计和程序设计。 电源控制器硬件电路采用单片机进行控制，单片机选用ADμC812，采用基于串行通信的ZLG7290芯片作为LED数码管与按键的人机界面接口电路，本设计采用4个按键和3个LED。 关键词：直流电机；开关电源；电源控制器；ADμC812 ABSTRACT The paper focuses on Study for a kind of back-EMF load of AC / DC switching power supply control method. Although the rapid development of switching power supply technology, for switching power supply to the electric power load category, there are no effective solution at home and abroad. Because the start-up, brake current of motor are often many times higher than its rating, the switching power supply always unable to work for shutdown of over-current protection when power supply to the corresponding power motor type load, or need to significantly reduced the amount of use so as to caused a great waste and . To solve the above problem, investigate a new type of switching power supply system for DC motor load. In this paper, propose overall proposal of the system first, analysis of its feasibility, and then establish the object mathematical model of the system, research integrated control algorithm, automatic voltage regulator (AVR) use regulator of ID to Setting the system to Typicalsystem, automatic current regulator (ACR) regulator of PI to Setting the system to Typicalsystem, use MATLAB to simulation and analysis, comparison with the traditional voltage regulator control, we get nice wave curve of voltage and current, reached the purpose of the maximum dynamic current control and Voltage stability control ,finally, design the power suppl