PHC21A-A022M1-E SEW 分散式变频器 变频器是可调速驱动系统的一种

产品细节：PHC21A-A022M1-E SEW 分散式变频器 变频器是可调速驱动系统的一种

变频器（Variable-frequency Drive，缩写：VFD），也称为变频驱动器或驱动控制器，在日本的商品名称用Inverter，和逆变器的英文相同。变频器的英文名称Variable-frequency Drive，是现代科技中少数源自中文者之一。

变频器是可调速驱动系统的一种，是应用变频驱动技术改变交流电动机工作电压的频率和幅度，来平滑控制交流电动机速度及转矩[1][2]:p210–215[3][4]:p4，最常见的是输入及输出都是交流电的交流/交流转换器。在变频器出现之前，要调整电动机转速的应用需透过直流电动机才能完成，不然就是要透过利用内建耦合机的VS电动机，在运转中用耦合机使电动机的实际转速下降，变频器简化上述的工作，缩小设备体积，大幅度降低维修率。不过变频器的电源线及电动机线上面有高频切换的讯号，会造成电磁干扰，而变频器输入侧的功率因数一般不佳，会产生电源端的谐波。

变频器的应用范围很广，从小型家电到大型的矿场研磨机及压缩机。全球约1/3的能量是消耗在驱动定速离心泵、风扇及压缩机的电动机上，而变频器的市场渗透率仍不算高。利用变频器来控制电动机的转速，带来能源效率的显著提升，是使用变频器的主要原因之一。变频器技术和电力电子有密切关系，包括半导体切换元件、变频器拓扑、控制及模拟技术、以及控制硬件及固件的进步等。

PHC21A-A022M1-E

Frequency converter (Variable-frequency Drive, abbreviated: VFD), also known as frequency conversion drive or drive controller, in Japan’s product name uses the Inverter, and the inverter in English the same. The English name of Variable-frequency Drive is one of the few modern technology derived from Chinese.

Frequency converter is a kind of adjustable speed drive system, is the application of variable frequency drive technology to change the frequency and amplitude of the working voltage of the AC motor, to smooth control the speed and torque of the AC motor [1][2]:p210 — 215[3][4]:p4, the most common is the input and output are AC/AC converter. Before the appearance of the frequency converter, the application of adjusting the motor speed needs to be completed through the DC motor, otherwise it is necessary to use the VS motor of the built-in coupling machine to reduce the actual speed of the motor in operation with the coupling machine. The frequency converter simplifies the above work, reduces the volume of the equipment, and greatly reduces the maintenance rate. However, there is a high frequency switching signal on the power line and motor line of the converter, which will cause electromagnetic interference, and the power factor of the input side of the converter is generally poor, which will produce harmonics at the power end.

Frequency converters are used in a wide range of applications, from small appliances to large field grinders and compressors. About one-third of the world’s energy is consumed in the electric motors that drive constant-speed centrifugal pumps, fans and compressors, while the market penetration of converters remains modest. It is one of the main reasons to use frequency converter to control the speed of motor, which brings significant improvement of energy efficiency. Frequency converter technology is closely related to power electronics, including semiconductor switching components, frequency converter topology, control and simulation technology, and control hardware and firmware advances.

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