西门子产品7MH4950-2AA01

7MH4950-2AA01

如果电压为 430 V，频率为 60 Hz，则伏特/赫兹比为 430/60 或 7.2 V/Hz。

VFD的工作原理是将电压和频率比保持在恒定。如果它不能保持这个恒定，电机电流就会变得不稳定，这可能会降低扭矩。

电机转速

电机速度可以使用公式计算

［Speed（RPM）=Frequency（Hz）timesfrac{120}{n}］

哪里

［n=数字，of，极点］

例如，具有 60 Hz 频率的 2 极电机，速度可以由下式确定

［速度（RPM）=60次压裂{120}{2}=3600RPM］

变频器的好处

节约能源

消耗非常低的电机启动电流

安装简单

消耗低 KVA

具有相对较高的功率因数

减少启动过程中皮带和电机上的机械和热应力

变频器应用

物料在传送带上传输，因为它提供平稳的启动。

自动系统打开和关闭门，因为VFD操作具有小的噪音

由于降低了功耗、减少了维护和延长了设备寿命，因此对物料进行提升控制和提升。

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