Feedback Linearization and Decoupling Control of Induction Motors
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摘要: 针对感应电机复杂耦合非线性模型,通过将转子磁链设置为Φ=φrα2+φrβ2,提出了新的控制策略,将感应电机转子磁链与转子速度解耦,成为两个独立的线性子系统,实现两者完全线性化,可用线性系统的二次最优化理论求解,设计的控制率没有奇异点问题,保证了转子磁链、转速及负载转矩的渐进跟踪.仿真验证了该方案的有效性.当转子转速变化时,转子磁链不会改变,实现了两者解耦,使系统具有良好的动静态性能.Abstract: A new control strategy was proposed to decouple magnetic flux linkage in the rotor from speed into two independent linear subsystems, namely,Φ=φrα2+φrβ2, The decoupled system can be solved with the linear quadratic optimal control theory.The designed control law is globally defined without singularity, ensuring asymptotically tracking the magnetic flux linkage in the rotor, speed, and torque.A simulation example demonstrates the feasibility of the proposed strategy.In the simulation, the magnetic flux linkage keeps constant while the rotor speed changes, and the system shows good dynamic and static performances.
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