Customer Testimonials
Quick Exchange!
5 star review 5 star review 5 star review 5 star review 5 star review
Quick Exchange!
Customer had a machine down and needed an Allen Bradley 2711E-K14C6 monitor.  We had two in stock ready to go.  The customer was on their way to pick it up from across the state.  Item was final-tested, boxed up and ready to go.  The customer picked the item up from our second shift team. They brought an exchange....

Naveen
Engineer
Comstar


See More Testimonials › 
Home ›  Learning Center ›  Tech Notes ›  Detail



 

Can You Run a Servo Motor with a VFD  Not so Fast

Can You Run a Servo Motor with a VFD Not so Fast

By Jade York
Can you run a servo motor with a VFD?  First, lets look at how a servo amplifier works with a servo motor.

A servo amplifier actually fires DC voltage into the three phases of a servo motor.  Each time a phase is fired, it is completely dependent upon rotor positioning reference to the stator windings to be fired.  In other words, you need commutation to run a servo motor.  Most servo motors will have an encoder that is coupled to the rotor and aligned to give rotor positioning reference to stator windings.

We have actually ran a Yaskawa servo motor open-loop on a variable frequency drive (VFD)   The results were not good.  You see, no matter how we tuned the drive, the end result was a very inefficient motor that drew high amps and had no torque.

Return to All Tech Notes link
EASA Repair Zone
Member since 1977
MMBDC Repair Zone
Michigan Minority Business
Development Council Member
EASA Accredited Member
Copyright 2020, Repair Zone

615 Andre St
Bay City, MI 48706
Phone: 989-922-0043
Email: support@repairzone.com
Owned and Operated By York Repair, Inc.
‚Äč
Payment Methods Accepted
We accept Visa We accept Mastercard We accept American Express
We accept Discover We accept eCheck We accept PayPal