基于新型虚拟矢量调制方法的IPMSM模型预测电流控制方法  

IPMSM Model Predictive Current Control Method Based on a Novel Virtual Vector Modulation Method

作　　者：汪逸哲 黄晟[1] 廖武[1] 张冀 黄守道[1] Wang Yizhe;Huang Sheng;Liao Wu;Zhang Ji;Huang Shoudao(College of Electrical&Information Engineering Hunan University,Changsha 410082 China)

机构地区：[1]湖南大学电气与信息工程学院,长沙410082

出　　处：《电工技术学报》2024年第8期2422-2433,共12页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(52277047)。

摘　　要：模型预测控制方法已经被广泛应用于内置式永磁同步电机(IPMSM)的控制之中,传统模型预测控制方法由于候选电压矢量数量有限,在电机运行过程中会产生较大的电流和转矩谐波。为了增加候选电压矢量数量,提出了构建虚拟电压矢量的方法。但是在应用虚拟矢量调制方法时,系统计算的负担会随虚拟矢量数量的增加而增加,因此控制效果会受到系统计算能力的限制。针对此问题,该文提出了一种新型的虚拟电压矢量调制方法,首先将电压扇区进行细分来增加虚拟电压矢量的数量,然后通过对指令电压矢量坐标进行标幺化处理的方法求得其角度,最后从基础和虚拟电压矢量之中由角度搜索选出最优电压矢量。在该方法中,系统的计算量大小与虚拟电压矢量的数量无关,因此可以在不增加系统计算负担的情况下提升系统的控制性能。实验结果表明,与虚拟矢量数量受到限制的虚拟矢量预测控制方法相比,该方法有效减少了三相电流谐波含量,并且减少了控制算法的执行时间。The model predictive control method has been widely applied to control internal permanent magnet synchronous motors(IPMSM).Conventional model predictive control methods only select voltage vectors from the basic voltage vector,resulting in a restricted number of candidate voltage vectors,which can generate large current and torque harmonics during motor operation.To increase the number of candidate voltage vectors,some studies have proposed methods for constructing virtual voltage vectors.However,the computational burden of the system will increase with the increase in the virtual vectors number,posing constraints on control performance.Therefore,this paper proposes a novel virtual voltage vector modulation method,which reduces the system computational burden by calculating the angle of the voltage vector.The specific steps of the proposed method are as follows.First,coordinate transformation is performed on the command voltage vector,and the command voltage vector is normalized by incorporating the magnitude of the DC bus voltage.Then,the sector in which the command voltage vector is located is determined by the coordinate values.The composite relationship between the command voltage vector and the adjacent two basic voltage vectors is obtained.Accordingly,the angle of the command voltage vector in the sector is obtained,and the voltage vector processing is equivalent to the first voltage sector.Subsequently,each voltage sector is evenly divided into N parts to construct virtual voltage vectors,and the virtual voltage vectors in the first voltage sector are numbered.The virtual voltage vector with the closest angle to the command voltage vector is selected through the rounding function.Finally,the optimal duty cycle is obtained through the cost function.The opening time of each phase of the three-phase switch is calculated based on the obtained optimal voltage vector number and duty cycle.Experiments on an IPMSM are conducted with a rated power of 1.5 kW to verify the proposed method.The experimental results sho

关 键 词：永磁同步电机 模型预测电流控制 虚拟电压矢量 占空比调制 

分 类 号：TM351[电气工程—电机]