双电机DSP控制交流伺服系统的设计与实现

【作者】 王明豪；

【导师】 杜国平；

【作者基本信息】 南京理工大学 ， 控制理论与控制工程， 2008， 硕士

【摘要】 随着电力电子技术的发展,以及永磁材料性价比的不断提高,永磁同步交流伺服系统在很多领域得到了广泛的应用。论文以某高炮火控搜索跟踪雷达系统为背景,设计了双电机DSP控制交流伺服系统,用于驱动雷达天线,实现对目标的自动跟踪。论文在分析永磁同步电机结构的基础上对其进行数学建模,通过对比不同的矢量控制策略,最终采用i_d=0控制策略设计永磁同步电机双闭环控制系统。硬件方面,分别设计了控制板和功率板。其中,控制板以DSPTMS320F2812微控制器为核心,外扩必要的接口电路,用于保持与外界的通信。功率板由整流、逆变、功率放大、电流检测、速度检测和故障检测单元构成,通过接收控制板的驱动信号,实现对永磁同步电机的控制,并将检测结果反馈给微控制器。软件方面,设计了永磁同步电机的闭环控制程序,程序分电流采样、位置检测、速度计算、PI调节和SVPWM控制等模块进行设计,并从安全性和交互性角度出发,在闭环控制程序中添加设计了通信、显示和故障处理模块。在完成系统硬件和软件的基础上,进行了系统调试与实验。实验结果显示系统设计合理、电路功能正确,为今后进一步的研究打下了坚实的基础。更多还原

【Abstract】 With the development of power electronics technology and the improved price/performance ratio of permanent magnet material, the permanent magnet synchronous motor (PMSM) servo system has been widely applied in many fields. Against the backdrop of the fire control searching and tracking radar of the antiaircraft artillery, this thesis designs a double motor PMSM AC servo system based on DSP to drive radar antenna, and thus realizes target auto-tracking.The current thesis develops a mathematical model of PMSM based on the analysis of the PMSM structure; and designs a double closed-loop control system of PMSM with i_d = 0 control strategy after the deliberate comparison between different vector control strategies.With regards to hardware, a control board and power boards have been designed respectively. The control board, with DSP TMS320F2812 MCU (Micro Controller Unit) being its core, expands necessary interface circuits in order to maintain external communications. The power board consists of the rectifier circuit, the inverter circuit, the power amplifying circuit, the current detecting circuit, the speed detecting circuit and the fault-detecting circuit. It receives commands from the control board, and thus controls the PMSM and fed back the detection results to MCU.In respect to software, this thesis designs closed loop control program of PMSM servo system which includes current sampling module, position detection module and velocity calculation module, PI regulation module and SVPWM module. Taking safety and interaction into consideration, the communication module, display module and recovery processing module are also designed, to be included in the closed loop control program.Based on the designed software and hardware, system debugging and experiment on the PMSM servo system are conducted. The result indicates that the design of the system is rational and the designed circuit is correct. The current research has laid a solid foundation for further research.更多还原