基于FPGA的永磁同步电机零计算延迟扩张控制集模型预测电流控制  

FPGA-based Extended Control Set Model Predictive Current Control With Zero Computational Delay for Permanent Magnet Synchronous Motor

作　　者：杨辰宇 刘凯[1] 胡铭觐 花为[1] YANG Chenyu;LIU Kai;HU Mingjin;HUA Wei(School of Electrical Engineering,Southeast University,Nanjing 210096,Jiangsu Province,China)

机构地区：[1]东南大学电气工程学院,江苏省南京市210096

出　　处：《中国电机工程学报》2024年第S01期264-273,共10页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：江苏省碳达峰碳中和科技创新专项资金(重点项目)(BE2022032-1)。

摘　　要：该文基于现场可编程门阵列(field-programmable gate array,FPGA),为永磁同步电机驱动提出一种扩张控制集模型预测电流控制策略(model predictive current control,MPCC)。由于在每个控制周期内只有8个基本电压矢量可供选择,传统有限控制集模型预测电流控制(finite control set MPCC,FCS-MPCC)稳态性能较低。为此,文中采用具有818个可选矢量的ECS来实现更精细的电压输出。为减轻因电压矢量大幅增加而带来的计算负担,设计一种简化的最优矢量搜索策略,且可推广用于其他多目标成本函数。基于算法固有并行性,将所提ECS-MPCC方法在FPGA中进行实现,使电流环总控制时间缩短至0.59μs,从而可以消除计算延迟,提高电流环动态性能。最后,通过仿真和实验,验证所提ECS-MPCC策略的有效性。实验结果表明,与传统FCS-MPCC相比,ECS-MPCC的相电流总谐波失真降低77%。This paper proposes an extended control set(ECS)model predictive current control(MPCC)for permanent magnet synchronous motor(PMSM)drives based on a field-programmable gate array(FPGA)platform.The conventional finite control set MPCC(FCS-MPCC)exhibits inferior steady-state performance since only 8 basic voltage vectors are available for selection in each control period.To address this issue,an ECS with 818 selectable vectors is employed to achieve a more refined voltage output.To alleviate the computational burden associated with the considerably increased number of voltage vectors,a simplified search strategy is designed and can be extended for other multi-objective cost functions.The proposed ECS-MPCC is implemented in an FPGA based on the inherent parallelism of the algorithm,which reduces the total control time of the current loop to 0.59μs.Such a short duration can eliminate the computational delay and improve the dynamic performance of the current loop.Finally,the proposed ECS-MPCC strategy is verified through simulation and experimental tests.The experimental results show that the total harmonic distortion of the phase current is reduced by 77%with the ECS-MPCC compared to the conventional FCS-MPCC.

关 键 词：模型预测控制 扩张控制集 零计算延迟 现场可编程门阵列实施 永磁同步电机 

分 类 号：TM351[电气工程—电机]