西门子6DD1681-0GA0 驱动模块
西门子6DD1681-0GA0 驱动模块
触发电路
可控硅触发电路是系统稳定可靠的关键部分，HPMV触发电路包括几个的优点，具有抗噪声干扰，可以工作在恶劣的工作环境和长久的使用寿命，他不受现场安装时线路阻抗、短路容量、或开关的快速通断而产生影响，这些特性包括：
A、自动同步的触发脉冲以保证每相的导通角的触发点相同从而不产生误触发，这特性适合那些小型工厂自备的发电机设备，MVC PLUS系列可以放心的使用于波动较大且不稳定的电源。
B、稳定可靠的触发脉冲信号可以在270度的导通角范围内可靠的使可控硅导通并且不受噪声信号的影响，以保证不产生误触发。
C、闭环触发控制方式是根据输出电流和电压反馈进行平滑的软起动，以防止由于起动时相间的不平衡而引起电机过热。
D、触发信号用脉冲变压器隔离特殊设计的三相120V低压控制电源变压器以确保检测、触发板和来自于输入中压电源的噪声和干扰进行隔离，使用具有高绝缘特性的28VAC电源供给脉冲触发电路，一个独立的控制电源变压器经磁隔离后用于所有的低压电路和CPU。
E、光导纤维隔离用于中压电源和全部低压系统之间，在通过CT隔离的信号再通过光导纤维隔离以达到大限度的隔离和确保
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