Destructive bearing currents can happen to any motor application controlled by VFD, ultimately leading to catastrophic motor bearing failure. When the accumulated shaft voltage is discharged through the bearing, the motor bearing is damaged, resulting in an EDM (Electric Discharge Machining) effect. Although high carrier frequency, constant speed operation, inadequate grounding and other factors increase risk and accelerate damage, it is still unpredictable when and where the bearing current becomes a problem.

Impeller dynamic balancing is the standard manufacturing process that every INFINAIR fan must undergo. Based on years of experience, INFINAIR’s leading impeller balancing technology helps implement the “reliable” value proposition of INFINAIR products…

Centrifugal fans are widely used for ventilation in factories, mines, tunnels, ships and buildings. They are machinery that relies on input mechanical energy to increase gas pressure and deliver gas. It is a driven fluid machine. Centrifugal fans are divided into forward-inclined and backward-inclined centrifugal fans. But what is the difference between the two types of fans?…

In installing fans, there are three urgent things to consider for contractors: 1) How can I save money? 2) How can I save time? 3) How can I have fewer problems after installi…

There are different styles of isolators, such as neoprene mounted, free-standing, restrained spring and housed spring isolators. Make sure your color coded isolators are correctly laid out according t…

The following factors are to be considered to avoid affecting airflow.   1. Obstructions. Obstructions near the fan inlet or outlet, such as dampers, elbows, duct transitions, guards, e…