西门子6AV2123-2GB03-0AX0

6AV2123-2GB03-0AX0

如果继续这个操作，并逐步缩短切换时间，则永磁体的转速会提高，并逐渐产生可以检测得到的感应电压，当处于感应电压可以被确认的状态时，将进入通常的无传感器120度通电驱动。 也就是说，这种方法的机制是：无论永磁体的位置如何，都在旋转方向上形成合成磁场，通过在时间内进行切换，使永磁体开始旋转，从而产生的感应电压，检测到该感应电压并将其应用到正常控制中。 在这种方法中，如果在开始时合成磁场切换过快，永磁体将不会跟随，因此需要从缓慢的周期开始，一点一点地逐渐加快。

检测同步运行时的感应电压的功能框图和工作波形

这是前面提到的工作的功能框图和工作波形。 用来生成启动周期的振荡器将ST_CLK发送到驱动用的基本波形生成模块，使之通过该信号生成预先确定了位置（与上述永磁体位置无关）的合成磁场，并按信号周期在旋转方向上切换合成磁场。 BEMF_DET是用来通知检测到感应电压的信号，当该信号进入启动周期生成振荡器时，ST_CLK停止，BEMF_DET被输入到驱动用的基本波形生成模块，开始生成基于感应电压的合成磁场，并进入正常控制状态。

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