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标题：基于扩张状态观测器的永磁同步电机无传感器控制方法 |
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作者：周杨，汤杰，盛明磊，等 |
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| 2018年第1期 访问次数：232次 |
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摘要：从状态观测器的基本原理入手，分析了基于一阶线性观测器的构建方法，分析一阶观测器的观测精度以及存在的问题：一阶线性状态观测器收敛速度慢，动态响应慢，抗干扰能力差。针对其存在的问题，将不确定的反电势量作为另一状态构建扩张状态观测器，形成二阶观测器结构，在提高了反电势的观测精度的同时加快动态响应速度和抗扰能力。最后，对以上内容进行仿真分析和实验验证。经对比分析，基于ESO的无位置传感器控制方案，观测精度非常高，系统抗扰性能良好。
关键词：永磁同步电机；无位置传感器控制；扩张状态观测器；电压源型逆变器
Abstract: Firstly, based on the design theory of observer, this paper designed the firstorder linear state observer and analyzed the precision and problems of the firstorder linear state observer which had slower convergence speed, slower dynamic response and poorer antiinterference ability. Then extended state observer (ESO) was proposed to overcome existing problems of the firstorder linear state observer, which regarded the uncertain state of back emf as a variable of ESO. This structure can improve the observation precision, accelerate the speed of dynamic response and enhance the antiinterference ability. Finally, through the simulation analysis and experiment results, the control scheme based on ESO had higher observation accuracy and better disturbance rejection.
Key words: PMSM；sensorless control；extended state observer(ESO)；voltage inverter |
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