Learning Center

How Will Line Reactors Help Your Variable Frequency Drive?

By Yin on 23rd Jun 2014

The problem:While VFD's provide great advantages in energy savings and increased efficiency, they are the #1 cause of electrical power system pollution. Reactors have become the most common means of reducing this pollution (or dir …

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What is a Line Reactor?

By Yin on 12th Jun 2014

A line reactor (also referred to as a "choke") is a variable frequency drive (VFD) accessory that consists of a coil of wire that forms a magnetic field as current flows through it. This magnetic field limits the rate of rise of t …

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How to Mount a Mitsubishi VFD Parameter Unit

By Paul Rossiter on 20th Mar 2014

Keypads for variable frequency drives (VFD) allow equipment operators to quickly change, update, or modify how a VFD controls the motor. Often these keypads are mounted directly on the VFD. However, VFDs are often mounted within …

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High Voltage Spike (dV/dt) and Motor Protection Methods

By Craig Hartman on 20th Mar 2014

There are two different phenomena that can create high dV/dt and high peak voltages. Reflective Wave Phenomenon Voltage wave reflection is a function of the voltage rise time (dV/dt) and the length of the motor c …

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