基于DSP的永磁同步电机控制系统设计.docVIP

目录 摘要 I ABSTRACT II 1 绪论 1 1.1 永磁同步电动机 1 1.1.1 交流同步电机调速特点 1 1.1.2 永磁同步电机简介 1 1.2 伺服系统 3 1.2.1 伺服系统的发展 3 1.2.2 控制策略的概述 4 1.2.3 直接转矩控制介绍 5 1.3 本设计的主要内容 6 2 永磁同步电机的直接转矩控制 7 2.1 永磁同步电机数学模型 7 2.1.1 dq轴系下的永磁同步电机模型 7 2.1.2 xy轴系下的永磁同步电机模型 9 2.2 基于滞环比较器的直接转矩实现 12 2.2.1 永磁同步电动机直接转矩控制控制系统数字化方案 12 2.2.2 电压矢量 14 2.2.3 运动电压矢量的作用 14 3 系统硬件结构 17 3.1 引言 17 3.2 DSP芯片选型及其功能介绍 17 3.2.1 DSP的选型 18 3.2.2 TMS320F2812功能介绍 18 3.3 功率电路的设计 19 3.3.1 主回路设计 19 3.3.2 延时启动电路设计 21 3.3.3 智能功率模块 21 3.3.4 直流侧电压的检测及过压欠压保护电路 24 3.3.5 辅助电源的选取 25 3.4 DSP控制板电路设计 26 3.4.1 模拟信号调理电路设计 26 3.4.2 位置检测电路设计 27 3.4.3 通信接口电路设计 28 3.4.4 DSP最小系统 28 4 系统软件设计 31 4.1 光电编码器 31 4.1.1 光电编码器介绍 31 4.1.2 转速计算方法 31 4.1.3 转子初始位置检测 32 4.2 直接转矩控制系统的软件设计 33 5 结论 35 参考文献 36 致谢 39 ABSTRACT Along with the development of the manufacturing，as an important of the numerical control machine，he robot and the elevators etc，PMSM servo system has been the important domain of the domestic and home research and application．The permanent magnet synchronous motor for superior speed adjustment performance was illustrated，and permanent magnet synchronous motor was presented．The development process and trends of servo systems are described． Through the analysis of permanent magnet synchronous motor physical model，the mathematical models of permanent magnet synchronous motor in different coordinate systems was established．And thus presented a direct torque control system block diagram and digital servo system implementation．Voltage vector applications in the direct torque control system was interpreted． Based on the whole framework of DTC system of PMSM，the thesis proposed the hardware and software methods of DTC system with TMS320F2812 as controller，and discussed that DSP design methods of direct torque controller．The hardware part includes a power circuit and control circuit．Where in the power circuit，including the main circuit，soft-start circuit，intelligent power module and the auxiliary power supply design．Control loop includes analog signal condit