中南大学学报（自然科学版）2012，Vol.43Issue(1)：177-183,7.
基于最大转矩控制的异步电机直接转矩弱磁控制方法
A novel flux-weakening scheme for direct-torque-control system of induction motor based on maximal torque control
摘要
Abstract
A new control scheme for flux-weakening operation of direct-torque-control induction motor drive was proposed. Its philosophy is to adapt hexagon flux track and make the flux reference respond to the change of the torque, thus weaken the spontaneous flux and limit the torque reference. The smooth transition into and out of the flux-weakening operation mode can he realized without any work parameters of the induction motor. The stator flux value is also restricted by a setting value in the whole process. It is easy to realize the control strategy by giving the flux reference in different speed stages without complicated calculation. Simulation verifies that the application of the control strategy improves the high speed performance of direct torque control effectively. With the premise of accelerating to the same speed, the problems of small output torque and long time for speed-up or slow-down are solved remarkably, and the smoothly transition between hexagon flux track and circular flux track is also implemented.关键词
异步电机/直接转矩/弱磁/最大转矩Key words
induction motors/ direct torque control/ flux-weakening/ maximum torque分类
信息技术与安全科学引用本文复制引用
李迅,刘五陵,桂卫华,喻寿益..基于最大转矩控制的异步电机直接转矩弱磁控制方法[J].中南大学学报（自然科学版）,2012,43(1):177-183,7.基金项目
国家自然科学基金资助项目(60574030) （60574030）
铁道部科技研究开发项目(2011J010-E) （2011J010-E）
