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标题：基于优化的滑模观测器永磁同步电机无位置传感器控制研究 |
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作者：杨奔，刘景林，卫丽超 |
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| 2015年第11期 访问次数：283次 |
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摘要：本文针对一个75 kW，5对极的永磁同步主轴电机，在其闭环矢量控制系统的基础上，基于滑模变结构控制理论，根据该永磁同步主轴电机两相静止坐标系下的数学模型研究设计了电流型滑模观测器，取代位置传感器给电机提供转子位置信息。针对滑模变结构控制存在的“抖振”问题，在传统的滑模观测器的基础上，本文通过采用饱和函数代替传统的开关切换函数来削弱滑模观测器控制中的“抖振”现象，使观测器得出的转子位置信息更加准确。通过Matlab/Simulink仿真软件对该无位置传感器控制方案进行仿真分析，仿真结果说明该方案能够有效地估算电机转子的位置和转速，并且优化后的方案能够更加准确的提供转子的位置和转速信息。
关键词：永磁同步主轴电机；无位置传感器；滑模观测器
Abstract: For a permanent magnet synchronous spindle motor of 75 kW, 5 pairs of pole, instead of providing angular position data by sensor, based on closedloop vector control system and sliding mode variable structure control theory, this paper designed a current sliding mode observer according to its twophase stationary coordinate mathematical model. As to the unique buffeting problem of sliding mode variable structure control strategy, this paper found a way to weaken the buffeting amplitude of sliding mode observer through replacing traditional switching function with saturation function, which can obtain more precise angular position data. Through analyzing the sensorless control scheme with Matlab/Simulink, the simulation result indicated that the scheme can estimate angular position and speed of rotor effectively, and can obtain more precise angular position and speed data with the corresponding scheme been optimized.
Key words: permanent magnet synchronous motor; sensorless; sliding mode observer
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