海鸥-机电工程试验中心-嘉兴学院.doc

直联压缩机两种不同控制方法的比较研究 杜玉霞，钟美鹏，王谨 （嘉兴学院 机电分院，浙江 嘉兴314001） 摘要：由于直联便携式空压机转矩波动大，为了减少空压机的振动，将滑模变结构控制策略引入直联便携式空压机控制中。为了节省能源、减少体积，采用永磁同步电机驱动直联便携式空压机。建立了空压机的负载数学模型，对其负载进行了分析。建立了永磁同步电机的数学模型，给出了一种用于交流永磁同步电机速度控制的滑模控制器。根据永磁同步电机的控制特点和空压机负载特点进行simulink仿真，仿真结果表明，加滑模控制器时，电机转速波动较小。最后，对用永磁同步电机驱动直联便携式空压机做实验。实验结果表明，与常规的PI控制策略相比，滑模变结构控制改善了系统的动态性能，有较强的鲁棒性。永磁同步电机驱动空压机效率高，转速波动小。 关键词：滑模变结构控制 空压机 负载 转速 中图分类号：TP271 文献标识码：A The research on two controls of direct-drive compressor DU Yuxia，ZHONG Mei-peng，WANG Jin （College of Mechanical and electrical Engineering, Jiaxing College，Jiaxing ,31400,China） Abstract: Because of direct portable air compressor’s high torque fluctuations, the sliding mode variable structure control strategy was applied to the direct portable air compressor control to reduce the vibration of the air compressor. In order to save energy and reduce the volume, we used permanent magnet synchronous motor direct drive portable air compressor. In this project, we not only established mathematical model of the air compressor load which was analyzed. But we also established a mathematical model of PMSM and presented a sliding mode controller which was used to AC permanent magnet synchronous motor speed control. According to the control characteristics of permanent magnet synchronous motor and characteristics of air compressor load, we made a Simulink simulation. From the simulation results, we knew that the motor speed fluctuation was lower with sliding mode controller. Finally, we tested on the direct drive portable air compressor with permanent magnet synchronous motor. The experimental results showed that, compared with conventional PI control strategy, sliding mode variable structure control improved dynamic performance of the system and had stronger robustness. Permanent magnet synchronous motor driven air compressor is with high efficiency and low speed fluctuation. Keywords: variable structure sliding mode control ； compressor；load; speed. 1.引言 随着全世界范围能源危机的到来，各国政府技术