摘要
研究设计了基于SVPWM控制策略的电流转速双闭环异步电机调速系统。本文在异步电机调速系统中在逆变电路和整流电路之间加一个Zeta电路,提高了系统整体的供电能力,更好的适应了负载变化。同时双闭环的反馈数据选择电机较容易测得的转子电流和转速,通过TMS320F28335转换成磁链和角速度,提高了系统的控制精度。根据电压空间合成矢量跟随空间磁链的控制策略,确定电压空间矢量大小、相位。理论分析中,依据电压空间矢量模型和假定的开关函数,算出在各扇区的IGBT的分配时间。研究最后给出负载Matlab的V-I仿真图,验证了设计的合理性和有效性。
The paper advances a kind of current and speed double loop asynchronous maclame speed regulation system based on the SVPWM strategy. The paper adds a Zeta circuit between the rectifier and inverter module to improves the traditional power-supply system and enhance the adaptation of the whole system. The rotator n and I are chosen as the feedback data, which are obtained easily and can be transformed into flux linkage by TMS320F28335. According to the controlling scheme of resultant voltage vector must follow flux linkage, computing the size, phrase of space voltage vector is vital to the system. On the basis of space vector voltage model and switch function, DSP calculates the times allocated to each IGBT spreading in all sections. At the end of paper, loads V-1 figs from Matlab has proven the whole design to be reasonable and efficient.
出处
《电气技术》
2012年第7期4-7,共4页
Electrical Engineering
