|
标题：基于磁链辨识模块切换的多感应电机矢量控制 |
|
作者：张今朝 |
|
| 2013年第4期 访问次数：213次 |
|
摘 要：针对两台异步电动机和两台逆变器组成的驱动系统，建立了按定子磁场定向数学模型，并证明了系统可逆性。为解决系统在低速运行时，受电机参数、温度和磁场非线性变化影响，造成定子磁链估计难以保持有效精度的问题，建立了新型磁链观测器。当多电机驱动系统在低速运行时，根据给定的性能指标，提出定子磁链局部模型网络辨识方法，而在高速时，切换到磁链电压模型，保证了定子磁链辨识的准确性，使驱动系统在全速范围内保持令人满意的控制效果，仿真结果证明了此方法的有效性。
关键词：多感应电机；定子磁链辨识；模型切换；局部模型网络；解耦
Abstract: According to two induction motor system including two inverters, a model under stator flux orientation was established, and was proved to be reversible. when the drive system running in low-speed, motor parameters such as stator resistance made stator flux be difficult to be estimated, so a new estimation for stator flux was put forward to solve this problem. In low-speed condition, a local model networks for stator flux was constructed to meet performance index given, and in high speed condition, the model was switched to voltage model of stator flux. Using this method, the control effect of drive system was guaranteed in whole-speed range because of satisfactory precision of stator flux identification, the simulation results showed the method was effective.
Key words: multi-motor; stator flux estimation; model switching; local model networks; decoupling
|
|
| |
|
