(VFD, PLC, HMI) Filter

(VFD, PLC, HMI) Filter
MICNO filter is an HMI filter for inverter used to eliminate interfering noise, filtering the input or output to obtain a pure power supply.

The PLC filter can effectively filter out frequencies at a particular frequency or frequencies outside of that frequency.

What is a filter for inverter?
The inverter filter is used to limit the rate of rising of the inverter output voltage and reduce common mode noise to the motor. In typical applications where DV/DT is limited to 100-500 V//spl mu/s, the resonance frequency of the filter is higher than the switching frequency.

Working Principle of VFD HMI Filter
HMI controls are connected with filters in the standard data-flow way: through input and output ports.

There are three possible ways of VFD load filter connection:

From a filter's output to a control's input – e.g. for displaying an image or a text result.

From a control's output to a filter's input, as data sources – e.g. for setting various parameters in a program with track-bars or check-boxes.

From a control's output to a filter's input, as events – e.g. for signaling that a button has been clicked.

Micno VFD masters the leading synchronization, a synchronization current vector control technology, torque control technology and solar pump VFD technology with more than 10 years of experience. Shenzhen MICNO Electric Co., Ltd. owns 12 domestic offices and overseas sales center, covering more than 80 overseas countries. Especially, the products well sold in the Middle East, Africa, South Asia, Southeast Asia, South America, etc.