摘要
提出了一种新型的基于感应电机状态方程的矩阵变换器驱动感应电机直接转矩和转子磁链控制方法,将传统直接转矩中的定子磁链控制替换为转子磁链控制,可以得到比传统直接转矩更高的输出转矩。将滑模变结构控制策略引入到矩阵变换器驱动感应电机直接转矩和转子磁链控制中,设计了基于加速度型趋近律的控制律,并直接在静止坐标系下进行运算,不需要传统控制中的坐标变换,采用光滑函数代替常规符号函数,从而达到快速趋近滑模面且具有低抖动的效果。结合矩阵变换器双空间矢量调制方法,并将矩阵变换器过调制方法用于感应电机直接转矩控制中,达到矩阵变换器开关频率恒定和电机快速转矩响应的目的。实验结果验证了该方法的正确性和有效性。
This paper presents a new method to control the torque and rotor flux of induction motor fed by a matrix converter based on state-space model of induction motor,the stator flux control in classic direct torque control（DTC） is substituted by rotor flux control,which can pull out higher torque.A variable structure control strategy was used in torque and rotor flux control.The control law was designed with reaching law based on stationary reference frame without coordinate transformation,and the sign function was substituted by smooth function,the merits of high-rate convergence and low chattering can be a-chieved by using this control law.Double space vector modulation and overmodulation of matrix converter were proposed in this paper to ensure the matrix converter switching frequency to be fixed and fast dynam-ic torque response.Experimental results are shown to illustrate the feasibility of the proposed strategy.
出处
《电机与控制学报》
EI
CSCD
北大核心
2010年第7期59-65,共7页
Electric Machines and Control
基金
国家973项目(2005CB221505)
关键词
变结构
矩阵变换器
直接转矩
转子磁链
过调制
variable structure control
matrix converter
direct torque control
rotor flux control
over-modulation
