摘要
针对感应电机效率控制过程中存在的寻优速度慢以及对电机参数依赖性大等问题,基于模糊技术,提出一种新的最大效率控制策略.由电动机损耗模型选取最优磁链搜索初值,根据输入功率偏差的大小自动调整模糊控制维数,大大提高了搜索速度,同时确保了效率寻优的稳定性.采用前馈补偿方法,并引入一阶微分环节解决了效率控制中的低频转矩脉动和转矩快速响应问题.仿真和实验结果表明,所提出的控制策略是有效的.
The methods commonly employed in maximum efficiency control of induction motor are sensitive to motor parameters, and have long convergence time. Therefore, based on fuzzy logic, this paper proposes a new maximum efficiency control strategy. Its initial value is ehoosen by the induction motor loss-model. The input number of fuzzy control can be adjusted automatically according to the input power deviation, so the searching speed is improved greatly and the stability of efficiency optimization is achieved. The problems of low-frequency pulsating torque and torque fast response are solved by using a feedforward compensation algorithm and a first order differentiator. The simulation and experiment results show the effectiveness of the proposed control strategy.
出处
《控制与决策》
EI
CSCD
北大核心
2009年第5期743-748,共6页
Control and Decision
基金
国家973计划项目(2007CB714006)
