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Motor and VFD

Discussion in 'Shop Talk - BladeSmith Questions and Answers' started by David6789, Feb 14, 2019.

  1. David6789


    Feb 14, 2019
    I am sure this has been asked a million times but I could not find the answer I was looking for .

    My garage does not have a 220v outlet only 120v's.

    1. So that being said are there 3 phase 56c TEFC motors I can use with a 120v outlet?

    2. What is the cheapest (even a Chinese knockoff) I can get away with? Please include some links?

    3. When I look at ebay for VFDs there are dozens. What VFD (cheap) will work? And it will need to be 120v as well. Links?

    Thanks in advance guys. I am so excited to be on this Blade Making journey.
  2. Ken H>

    Ken H>

    Dec 31, 2011
    It's not the motor that determines 120 vac use, but the VFD. The VFD will take the single phase 120 vac (or 240 vac) and change it to 3 ph 240 vac to run the motor. I did see a Chinese VFD that would run on 120 vac input but it was really expensive. It seems that all of the "cheap" Chinese drives require 220 vac input. The KBAC drives will take 120 vac input, but say they are limited to 1-1/2 hp motors. From the manual:

    "KBAC-24D, 27D, 29 (1P): Designed to accept 1-phase (Terminals L1, L2) AC Line input only. Rated for 208/230 Volt AC Line input with Jumper J1 set to the "230V" position (factory setting). Rated for 115 Volt AC Line input with Jumper J1 set to the "115V" position. KBAC-27D is rated for 1½ HP maximum with 115 Volt AC Line input and 2 HP maximum with 208/230 Volt AC Line input."
  3. David6789


    Feb 14, 2019
    Would I be better off just getting a single phase and an on off button since the garage only has 120v in it?
    kdnolin likes this.
  4. Jesse Latham

    Jesse Latham

    Jul 4, 2010
    No. Buy the KBAC-27D, buy 1.5hp motor, run it on 120v, don't look back. It's not rocket science this combo will make you happy for many years.
    12345678910 and Ken H> like this.
  5. Stacy E. Apelt - Bladesmith

    Stacy E. Apelt - Bladesmith ilmarinen - MODERATOR Moderator Knifemaker / Craftsman / Service Provider

    Aug 20, 2004
    Plus 1 for the above post.
    Don't despair, the 1.5HP of the 120VAC setup works just fine. I used a 1.5HP Bader with speed control on 120VAC for ten years, and never had an issue. If you get 220VAC later, just change the cord plug and switch the jumper to 230V.
    Ken H> likes this.
  6. Ken H>

    Ken H>

    Dec 31, 2011
    As the folks above said, NO!!!!! VFD is the ONLY "reasonable" way to go. 110 vac is just fine - only issue for me would be requiring use of the expensive KBAC drives. They are good drives, just expensive for an old cheapskate like me. I've only been called "Diamond Jim" in jest.
  7. David6789


    Feb 14, 2019
  8. dsutton24

    dsutton24 Gold Member Basic Member Gold Member

    Apr 9, 2018

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