主电路设计与参数计算-ourDEVCN网页不存在.DOC

 摘 要 本文介绍的是一种基于DSP TMS320LF2407A 芯片的双极性可逆PWM直流调速系统数字控制的设计。用一台200W的直流电动机，DSP构成的数字化直流调速系统。设计是在对控制对象全面回顾总结的基础上，重点对控制部分展开设计，它包括对实现控制所需要的硬件和软件环境的探讨，控制策略和控制算法的探讨等内容。在硬件方面充分利用数字信号处理器外设接口丰富，运算速度快的特点，采取软件和硬件相结合的措施，实现对转速、电流双闭环调速系统的控制。特点是用DSP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。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：DSP TMS320LF2407A 芯片；PWM；直流调速系统；数字控制； 双闭环  ABSTRACT This paper introduces a kind of conception about the bipolar invertibility PWM DC adjust speed system digit control, which is based on DSP TMS329LF2407A control chip. Here is a digital DC speed control system composed by 200W DC motor and DSP computer, Based on the overall review of control object, the emphasis is put on the part of control system, which includes the discussion of hardware selection and software environment, control policy and algorithm, etc. It filly utilizes the advantage of DSP that are abundant interface and fast speed. It has the characteristic that the analog trigger, current regulator, rotation regulator, logical handoff and other devices were replaced by DSP computer; and finally put through the software programmer and testing. As a result，the digital DC speed control system realized the constant speed adjustability of the double closed-loop of electric current. This system also has the specialties such as simple structure, high control accuracy, low cost and easiness to be spread. In addition, its entire performance index is better than analog DC speed control system. As a result, the digital DC speed control system could be applied into production and ordinary life to satisfy the needs of modern manufacture. Keywords: TMS329LF2407A chip；PWM；DC-drive speed system； Digital control；double closed-loop  目 录 摘要 Ⅰ ABSTRACT Ⅱ 前言 1 1 系统方案选择和总体结构设计 3 1.1调速方案选择 3 1.2 系统控制方案选择 5 1.3 总体结构设计 8 2 主电路设计与参数计算 11 2.1 主电路中选型 11 2.2 主电路中参数计算 16 2.3 系统硬件结构图 20 3 调速系统设计 21 3.1 模拟控制双闭环直流调速系统电路原理图 21 3.2 调速系统的静态特性和动态特性分析 22 3.3 调速系