期望扇区三矢量模型预测电流控制
Three-Vector Model Predictive Current Control by Expected Sector
卓书芳 1黄宴委 2傅忠云 3何用辉1
作者信息
- 1. 福建信息职业技术学院数字技术学院,福建 福州 350003
- 2. 福州大学电气工程与自动化学院,福建 福州 350108
- 3. 南京航空航天大学金城学院,江苏 南京 211156
- 折叠
摘要
三矢量模型预测电流控制需要依次计算 6 扇区电压矢量的作用时间,再由价值函数选取期望电压矢量,存在计算量大的缺点.本文提出一种基于期望扇区的三矢量模型预测电流控制,以快速确定期望电压矢量.首先,建立d-q轴的三矢量电流模型,给出其三矢量作用时间;然后,令预测电流为期望电流,可以获得期望电压矢量,并利用Clark变换得到α-β轴的期望电压矢量;最后,利用反正切函数求得期望电压矢量角度,确定期望电压矢量所在的期望扇区,得到期望三矢量及其作用时间.仿真和实验表明,该方法能够保持很好的控制系统性能.同时,该方法只需一次计算期望电压矢量角度即可确定期望三矢量及其作用时间,比传统三矢量方法有效缩短了算法执行时间约 60%.
Abstract
The value function is used to select the expected voltage vector from the six groups of voltage vectors as the control variable in three-vector model predictive current control,which has the disadvantages on heavy computing cost.A novel three-vector model predic-tive current control with the expected sector is proposed to quickly determine the expected voltage vector as the current control variable.Firstly,three vector current model of d-q axis is set up with the execution time of the expected vector.Moreover,the expected vector is determined with the condition that predictive current is equal to expected current,and the expected voltage vector of α-β axis is deter-mined by Clark transformation.Finally,the angle of the expected voltage vector is obtained by arctangent function to determine the expect sector and execution times of the expected vectors.Simulations and experiments show that the proposed method can maintain excellent control performance and effectively reduce the execution time on control cycle by about 60%of the traditional three-vector model predic-tion method.
关键词
永磁同步电机/电流控制/三矢量模型预测/期望扇区/计算量小Key words
permanent magnet synchronous motor/current control/three-vector model prediction/expected sector/low computing cost引用本文复制引用
基金项目
国家自然科学基金(51977040)
福建省中青年教师科研项目(JAT210726)
福建省中青年教师科研项目(JAT220564)
出版年
2024
NETL
NSTL
万方数据