摘要
传统的异步电机直接转矩控制系统采用滞环控制器,依据转矩误差、定子磁链幅值误差来选择逆变器的开关状态,属Band-Band控制,无法区分转矩误差、定子磁链误差的等级,开关频率不恒定,过扇区时电流与磁链畸变,导致低速时转矩脉动大,影响了系统的控制效果。针对这一问题,提出了一种基于模糊PI控制的异步电机直接转矩控制方案,介绍了系统的原理,应用模糊理论设计了控制器的参数,用TMS320F2812作为主控芯片,PM30CSJ060作为逆变器主电路搭建了全数字实验系统。实验结果表明系统控制动、静态性能好,低速时系统运行平稳,达到了预想的控制效果。
Traditional induction motor direct torque control system with the hysteresis loop controller,based on torque error,set the amplitude error to select the inverter switching state,is a Band-Band Control,torque error and stator flux error of level can not be distinguished,switching frequency is not constant,over-sector current and the distortion flux linkage can product low speed torque ripple,affecting the control of the system effect.The paper proposed fuzzy PI control of induction motor direct torque control scheme,a system of principles was introduced,controller parameters was designed by fuzzy theoretical.Finally a full-digital experimental system was built with the TMS320F2812 as the master chip and PM30CSJ060 as an inverter main circuit.Results show that the dynamic and static performance and running smoothly with low-speed is verified.
出处
《机床电器》
2010年第4期7-9,共3页
Machine Tool Electric Apparatus
基金
湖北省教育厅项目:B20083001
