级联型逆变器的多速率采样直接转矩控制算法  

Multirate sampling direct torque control algorithm for cascaded inverter

作　　者：阳助威 欧阳红林[1] 汤辉[1] 莫旭杰[2] 何志[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082 [2]南车株洲电力机车研究所有限公司,湖南株洲412001

出　　处：《电源技术》2014年第8期1555-1557,共3页Chinese Journal of Power Sources

摘　　要：为了解决三相异步电机电磁转矩和定子磁链脉动大以及开关频率变化等问题,提出了一种基于相移空间矢量调制的多速率采样直接转矩控制算法。在同一个数字信号处理器中,采用两种采样周期,一种用于数据采集和速度、转矩、磁链估计的基本采样周期;另一种用于速度、转矩、磁链误差的处理和执行相移空间矢量控制算法。逆变器主电路采用H桥级联式拓扑结构,具有高质量输出波形,低共模电压,低谐波等特点。仿真及实验结果验证了该算法的可行性。The direct torque control algorithm of multirate sampling based on phase-shifting space vector modulation was proposed to solve the problems of electromagnetic torque in three-phase asynchronous motor,large stator flux ripple and variable switching frequencies.In the same digital signal processor,two sampling periods were used.The fundamental sampling period was used for data capturing and estimation of speed,torque and flux parameters.The other sampling period was used for speed,flux and torque error processing and the implementation of phase-shifting space vector control algorithm.Inverter circuit with H-bridge cascaded topological structure has the advantages of high quality output waveform,low common mode voltage and harmonic.Simulation and experimental results verify the feasibility of the proposed algorithm.

关 键 词：多速率采样 直接转矩控制 级联型逆变器 相移空间矢量 

分 类 号：TM464[电气工程—电器]