变频器功率模块ATV1200700/100

变频器功率模块ATV1200700/100

变频器功率模块ATV1200700/100

变频器功率模块ATV1200700/100

西门子旋转变压器的工作原理和普通变压器基本相似，区别在于普通变压器的原边、副边绕组是相对固定的，所以输出电压和输入电压之比是常数，而旋转变压器的原边、副边绕组则随转子的角位移发生相对位置的改变，因而其输出电压的大小随转子角位移而发生变化，输出绕组的电压幅值与转子转角成正弦、余弦函数关系，或保持某一比例关系，或在一定转角范围内与转角成线性关系；西门子旋转变压器在同步随动系统及数字随动系统中可用于传递转角或电信号；在解算装置中可作为函数的解算之用，故也称为解算器。

西门子旋转变压器一般有两极绕组和四极绕组两种结构形式。两极绕组旋转变压器的定子和转子各有一对磁极，四极绕组则各有两对磁极，主要用于精度高的检测系统，除此之外，还有多极式旋转变压器，用于检测系统；西门子旋转变压器简称旋变是一种输出电压随转子转角变化的信号元件，当励磁绕组以一定频率的交流电压励磁时，输出绕组的电压幅值与转子转角成正余弦函数关系，或保持某一比例关系，或在一定转角范围内与转角成线性关系。

西门子变频器SINAMICS G120系列的功率模块PM250在能量再生状态下具有能量回馈的能力，这样它可以将能量回馈给电网，而不是消耗在制动电阻上。这样功率模块PM250节省了柜体的安装空间，节省了接线的数量和安装调试的时间，同时它还可以减少柜体的散热;

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