22B-D2P3H204

22B-D2P3H204

22B-D2P3H204矢量控制也称磁场定向控制，其原理是将异步电动机在三相坐标系下的定子电流la，Ib及Ic，通过三相/二相变换，等效成两相静止坐标系下的交流电流la1及Ib1，再通过按转子磁场定向旋转变换，等效成同步旋转坐标系下的直流电流Im1及It1(Im1相当于直流电动机的励磁电流;It1相当于与转矩成正比的电枢电流)，然后模仿对直流电动机的控制方法，实现对交流电动机的控制其实质是将交流电动机等效为直流电动机分别对速度磁场两个分量进行独立控制通过控制转子磁链，然后分解定子电流而获得转矩和磁场两个分量，经坐标变换，实现正交或解耦控制。但是，由于转子磁链难以准确观测，以及矢量变换的复杂性，使得实际控制效果往往难以达到理论分析的效果，这是矢量控制技术在实践上的不足，此外。它直接或间接地得到转子磁链在空间上的位置才能实现定子电流解耦控制，在这种矢量控制系统中需要配置转子位置或速度传感器。这也就是为什么有那么多传感器知道位置的原因。

22B-D2P3H204 

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