A variable frequency drive is an electronic device that allows you to start, stop, and control the speed of a three phase motor. It is also a motor starter as it is equipped with overload protection. Read more »
What is the difference between a 'new surplus' motor and a 'factory new' motor?
Our New Surplus electric motors are offered at lower prices and come with our 90-day warranty.
Factory New products are competitively priced and come with a manufacturers warranty.
Variable frequency drives (VFDs or inverters) now play an important part in major industry.
Within the last 10 years they have been perfected to control and vary the speed of 3 phase electric motors. They serve many purposes, besides speed control. Homeowners and hobbyist alike, who have lathes or milling machines with a 3 phase motor, usually don't have 3 phase power to operate. These VFDs (instead of using a rotary phase converter) can now be used to convert single phase power to 3 phase power. Read more »
This braking resistor is used with a Variable Frequency Drive in applications that require fast deceleration rates and/or where overhauling conditions are present (where the motor speed exceeeds the speed commanded by the VFD.) For use in applications requiring a
high inertia load to stop rapidly. It increases the braking torque capability of the drive allowing faster and better
controlled braking. During braking the AC motor acts as a generator and this resistor helps dissipate the generated power to keep the bus voltage from exceeding the limit of the drive.