毕业设计（论文）--基于PIC单片机的直流调速系统设计.doc

毕业设计(论文) 题 目 基于PIC单片机的直流调速系统设计 学生姓名 学 号 专业班级 指导教师 学 院 答辩日期 摘要 本设计介绍的是用一台75KW的直流电动机，PIC16F877单片机构成的数字化直流调速系统。特点是用单片机取代模拟触发器、电流调节器、速度调节器及逻辑切换等硬件设备。最后进行软件编程。实时控制结果表明，本数字化直流调速系统实现了电流和转速双闭环的恒速调节，并且具有结构简单，控制精度高，成本低，易推广等特点，而且各项性能指标优于模拟直流调速系统，从而能够实际的应用到生产生活中，满足现代化生产的需要。 关键词　直流调速；；。 Abstract In recent years, Domestic diplomacy DC system due to the rapid development of microcomputers, digital has reached the stage to use. As the microprocessor as the core digital control system hardware circuit high degree of standardization, low production costs, and not affected by the device temperature drift. The control software logic and complex operations can be different from the general linear regulator optimized, adaptive, nonlinear, and intelligent control law. The microcomputer control system in all aspects of performance far superior to the analog control system and more widely. This design introduces a 75KW DC motor, constitute a PIC16F877 microcontroller digital DC speed control system. Feature is replaced with single-chip analog triggers, current regulator, speed regulator and logic switching hardware. Finally, the software programming. Real-time control results show that the digital DC speed control system to achieve a constant speed adjustment of the current and speed closed-loop, and has a simple structure, high control accuracy, low cost, easy promotion, but the performance is better than analog DC tune speed system, allowing the practical application to the production life, to meet the needs of modern production. Keyword DC speed control； PIC16F877； Double Closed Loop 目录 摘要 Abstract 第一章 绪论…………………………………………………………………………………1 1.1 课题背景 ………………………………………………………………………………1 1.2 数字化直流调速系统的发展状况 1.3调速系统实现数字化的必要性 1.4设计 第二章 方案比较与选择……………………………………………………………………3 2.1直流调速用可控直流电源 ……………………………………………………………3 2.2方案比较 2.3 控制系统结构……………………………………………………………………………3 2.4 数字控制双闭环逻辑无环流可逆调速系统……………………………………………4 第三章 双闭环逻辑无环流调速系统的分析………………………………………………6 3