Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

VFD problems motor not running?

  1. Oct 9, 2006 #1
    Hi all,

    I am new on the forum. I have a customer who is having some problems with running their motor with the VFD. I realized they had tampered with the setup parameters and luckily we corrected all the parameters. However, they have gained control on the motor, but the motor is unbalanced. The maintenance people are measuring between phases 300 vac instead of 240 vac. It's a three phase motor rated 415 volts at 50 Hz.
    I told the customer that either the output from the VFD is not balanced or the motor might be damaged.
    What else can I help to solve this problem?
    Any help?
  2. jcsd
  3. Oct 9, 2006 #2


    User Avatar

    Staff: Mentor

    Are they using a true rms voltmeter to measure the voltage? The VFD changes the wave....
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook