摘要
针对异步电机直接转矩控制系统的弱磁控制,提出了一种新的弱磁控制策略。该策略最基本的思想就是使磁链给定值跟随着转矩误差的变化。该算法不需要复杂的电机参数而且能够实现各个速度段的平滑过度。在整个运转过程中限制定子磁链不超过设定值,在不同的速度区段给定不同的定子磁链,易于实现。最后,文章通过仿真验证了该控制策略可实现异步电机直接转矩控制系统的弱磁升速和减速过程。
A new control scheme for flux-weakening operation of direct-torque-control induction motor drive is proposed.The basic idea is to adjust the flux reference on the basis of the torque error,thus determining a spontaneous flux weakening.The algorithm can achieve a smooth section over all speed without complex electrical parameters.The stator flux reference is limited under setting value in the whole process.It is easy to realize the control strategy by giving the flux reference in different speed stages without complex calculation.A Matlab / Simulink based simulation verifies the feasibility of the control strategy.
出处
《通信电源技术》
2010年第3期8-10,共3页
Telecom Power Technology
基金
国家自然科学基金项目(60574030)
关键词
异步电机
直接转矩控制
弱磁
最大转矩
induction motors
direct torque control
flux-weakening
the maximum torque
