基于增量电感拟合的开关磁阻电机电流预测控制  

Current Predictive Control of Switched Reluctance Motor Based on Incremental Inductance Fitting

作　　者：靳峰雷[1] 张利深 JIN Feng-lei;ZHANG Li-shen(China Institute of Atomic Energy,Beijing 102413,China;No.21 Research Institute of CETC,Shanghai 200233,China)

机构地区：[1]中国原子能科学研究院,北京102413 [2]中国电子科技集团公司第二十一研究所,上海200233

出　　处：《微特电机》2020年第2期42-46,共5页Small & Special Electrical Machines

摘　　要：针对开关磁阻电机(SRM)相电感较小,造成有限的电流采样频率与控制频率内电流难以控制的问题,研究了一种固定调制频率的电流预测方法。该方法将电压方程离散化,用以预测下一拍的电压有效值并进行调制。对于预测算法中所需的增量电感参数,采用一种斩波旋转测量与傅里叶级数拟合相结合的方法,得到SRM全位置的增量电感参数。针对DSP控制的一拍延迟问题,引入了补偿方法。仿真与实验使用一台低电感6/4 SRM证明了电流预测控制的有效性。Aiming at the problem that the phase inductance of the switched reluctance motor(SRM)is small,which caused the phase current difficult to control because of the limited current sampling and control frequency,a current prediction method with fixed switching frequency was studied.The method discretized the voltage equation to predict the RMS value of the next beat and modulate.For the incremental inductance parameters needed in the algorithm,a chopper rotation measurement method combined with Fourier series fitting method was used to obtain the incremental inductance parameters of SRM at all positions.For the problem of DSP control one-beat delay,a compensation method was introduced.Simulation and experiment demonstrated the effectiveness of current predictive control by using a low inductance 6/4 SRM.

关 键 词：开关磁阻电机 电流预测 旋转斩波测量 增量电感拟合 

分 类 号：TM352[电气工程—电机]