【作者】 贾涛；

【导师】 王耀南；

【作者基本信息】 湖南大学 ， 控制理论与控制工程， 2004， 硕士

【摘要】 本论文结合湖南省自然科学基金项目“高性能智能化感应电机变频调速系统研究”，开发出基于DSP的全数字感应电机控制实验平台，并给出了该系统的软硬件设计方案。平台的上位机为工控机，下位机为DSP控制板以及变频器主电路，通过在DSP中编写汇编程序实现电机的控制方法。在实际使用中，上位机一方面可以实时查看波形，了解电机的运行状况，另外一方面，上位机还可以对下位机进行启动、停止和变量修改等控制，最后系统发出PWM波对感应电机进行控制。在该平台上能方便的利用程序实现各种高性能的电机控制算法，本文在该平台上进行感应电机矢量控制的实验研究。在理论方面，本文提出了一种基于自适应磁通观测器的无速度传感器感应电机的矢量控制方法，该方法简单易行、转速估计较准确，速度跟随性能较好。然而由于感应电机数学模型复杂，具有非线性、时变、耦合等特点，仿真结果表明使用PID速度控制器的系统性能不能满足要求，受参数变化和外部扰动影响严重。因此，本文将模糊控制引入其中，提出了一种基于自适应模糊控制器的无速度传感器感应电机矢量控制系统，其中用自适应模糊控制器来代替传统的PID控制器，此控制器根据外界条件动态调整解模糊因子，从而具有较好的自适应性。通过与使用传统PID控制器的无速度矢量控制系统进行仿真比较，结果表明使用自适应模糊控制器的系统具有更好的动态性能，控制器的收敛速度快、静差小，系统在遇到参数发生变化和外部不确定性因素影响时鲁棒性、抗扰动性有明显的提高。更多还原

【Abstract】 This paper develops an full digital induction motor vector control platform based on DSP which is related to the subject of Natural Science Fund of Hunan Province "The Research on the System of High Peformance Intelligentized Induction Motor Variable Frequency Speed Regulating", and presents the software and hardware design scheme. The upper computer is industry control computer, and the lower is DSP control board and transducer main circuit, then the motor control method is realized through the assembly language in DSP. In the practice, on the one hand the upper computer can observe the wave and understand the condition of the motor on running, on the other hand it can control the lower in starting, stopping and variable revising, at last the system output the PWM waves to control the induction motor. Varied high performance motor control algorithms can be realized on this platform and the experimental research in this paper is also put up on it. On theoretic aspect, a kind of sensorless induction motor vector control system based on adaptive flux observer is brought forward. The method is easy and can estimate the speed exactly; meanwhile, the speed following performance is quite good. However, because the math model of induction motor is complex, non-linear, time changing and coupling, the simulation result shows that the performance of the system using PID speed controller is not very satisfying which is strongly affected by the varying parameter and exterior disturbing. Thus, fuzzy control is introduced and a king of sensorless induction motor vector control system based on adaptive fuzzy controller is presented in which the traditional PID controller is replaced by the adaptive fuzzy controller. This controller adjusts the de-fuzzy parameter dynamically on the basis of outside condition and consequently has good adaptability. Compared with the sensorless vector control system using traditional PID controller, the system has better dynamic performance and smaller still difference, more it converges rapidly. The ability of robustness and anti-jamming has been improved greatly.更多还原