基于DSP的异步电机矢量控制系统的研究与设计

【作者】 韩晓亚；

【导师】 周继华；

【作者基本信息】 西北工业大学 ， 电力电子与电力传动， 2004， 硕士

【摘要】 论文研究设计了异步电机的双闭环矢量控制系统。以电机控制专用芯片TMS320X2407为核心构成控制系统电路，进行电流的完全解耦，产生SVPWM波形，实现了交流异步电机速度的闭环控制。论文的主要工作和新见解如下： 1．深入研究了转子磁场定向矢量控制系统的数学模型，设计了转速、磁通及转矩的闭环调节器：对SVPWM的工作原理和控制算法进行了研究，并分析比较了它的两种控制方式。 2．系统采用的SVPWM算法通过对空间磁链矢量幅值和相位的控制来调节电机转速，减少了逆变器输出电流的谐波，降低了脉动转矩，提高了电压的利用率。 3．利用TMS320X2407强大的实时运算能力和内部集成的专用硬件模块，大大优化了SVPWM的实现算法，提高了生成SVPWM波形的质量。 4．针对转子磁链受电机参数影响误差较大的缺点，采用改进的电压模型和电流模型相结合的方法，提高了磁链观测器运算精度以及对电机参数的鲁棒性。 5．设计构造了实验室原理样机检验实验系统，验证了系统设计方案的有效性和可行性。最后出了系统进一步的改进方向。更多还原

【Abstract】 A closed-loop vector-control system of AC motors is presented in the paper. By the use of the digital signal processor(DSP) TMS320LF2407 developed for motor control purpose, it can realize uncoupling of stator’s current and the algorithm of SVPWM, then it achieves the speed closed-loop control of AC motors. The main contents and innovations of this paper are as follows:1. Analysis of the mathematics model of the field oriented vector-control system, design of the closed-loop PI controller of speed, torque and flux; Studies on the control principle and algorithm of SVPWM, and analysis of the two control methods of SVPWM.2. The algorithm of SVPWM that is adopted by the system implements motor speed -regulation by control of magnitude and phase of motor flux. It can generate less harmonics in the output current of power inverter and less losses of AC motor, reduce pulsant component in output torque and raise availability of DC supply voltage.3. By means of high-speed calculation and abundant function module of TMS320LF2407, the algorithm and the effect of SVPWM has been greatly optimized.4. Aim for the higher precision and reliability of rotor flux, the improved combinatorial model has been adopted.5. Design of the software and hardware of the control system, lots of experiments that have been performed prove the rationality and feasibility of the control system.更多还原