基于动态磁链修正的感应电机转矩响应方法  

Induction Motor Torque Response Method Based on Dynamic Flux Modify Technology

作　　者：李冰[1] 钟利军[1] 王刚[1] 田小建[2] 

机构地区：[1]白城师范学院,机械工程学院,吉林白城137000 [2]吉林大学,电子科学与工程学院,吉林长春130000

出　　处：《电力电子技术》2017年第2期85-89,共5页Power Electronics

基　　金：国家自然科学基金(61171078);吉林省教育厅“十二五”科学技术研究项目(吉教科合字2013第496号)~~

摘　　要：为提升高速感应电机驱动系统的动态转矩响应能力,提出一种基于动态磁链修正的感应电机快速转矩响应方法。建立高速感应电机磁场定向控制(FOC)系统数学模型,并分析逆变器最大输出电压与电机磁链之间的矢量关系;对电机转矩变化率进行详细推导,得出动态转矩最大输出点为逆变器的有效矢量之一的固有特性;然后,打破传统FOC方法中圆形磁链的约束,引入动态磁链修正环节以实现FOC系统过调制操作,动态过程中定子磁链由圆形变化为旋转六边形。最后,25 kW样机实验结果表明,动态磁链修正机制的引入对于提升感应电机FOC系统转矩响应具有可行性和有效性。To enhance the dynamic torque of induction motor drive system for high speed responsiveness, a method is presented taking into account inverter voltage limits for induction motor speed torque response.Firstly,high-speed induction motor field oriented control （FOC） system mathematics model is established, and inverse variable device maximum output voltage and motor magnetic chain of vector relationship is analyzed, motor turned moment changes rate is derived, dynamic turned moment maximum output points for inverse variable device of effective vector one of inherent characteristics is obtained,traditional FOC method in the round magnetic chain of constraints is broken, dynamic modulation of the flux correction link to achieve the FOC system operations, dynamic process of stator flux changes from round to rotate hexagonal.Finally, experimental results show that simplifying modulation mechanism introduced to upgrade the FOC of 25 kW induction motor system in torque response is feasibility and effectiveness.

关 键 词：感应电机 磁场定向控制 快速转矩响应 动态磁链修正 

分 类 号：TM346[电气工程—电机]