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How To Help with 3 phase 2x72 motors

Discussion in 'Shop Talk - BladeSmith Questions and Answers' started by Skiller1nc, May 19, 2019.

  1. Skiller1nc


    Jun 27, 2016
    So I'm shopping for a motor for my belt grinder. I just purchased a VFD link here: https://www.ebay.com/itm/2-2KW-3HP-...196433?hash=item33b5b9fa51:g:OGgAAOSwD~xZk7to

    My shop does not have 3 phase or 220, however, I plan to install at least one 220 outlet and use the VFD to go from single to triple phase. Thus I am looking for a 3 phase 220v motor I can use with this VFD. I know that some motors list their voltages at say 220 and 440 and can be used at either voltage. However, I found a motor that lists only 400v. Link: https://www.ebay.com/itm/2-HP-Elect...m=264278493617&_trksid=p2047675.c100005.m1851

    Can anyone explain this a bit for me? does this motor have to be ran at 400v or can it be ran with 220? Will I have to change Hz to achieve the same speeds and will I lose torque or wear the motor out faster? Any help is greatly appreciated.
  2. Collin Johnson

    Collin Johnson

    May 16, 2019
    First, I would not personally get that motor, Since it is an unnamed motor I would say that it probably a cheaper Chinese motor. The listing doesn't give a lot of information about it and I would also recommend getting something that runs at 1800 and is a 4 pole because it will have more torque and with the vfd you'll be able to reach the speeds of the 3800 2 pole motor. Looking up the model number you can also find the motor for around 80 dollars. I would recommend getting a brand that is recognizable from ebay. There is nothing wrong buying used if you can trust the seller
    Lieblad likes this.
  3. Skiller1nc


    Jun 27, 2016
    Yes, I was also hesitant about getting that motor due to the things you said. I just wanted to use it as an example to learn more. I'm looking at a 2hp 3phase 1750 rpm Dayton atm. Hopefully, that works out. Thank you for your help.
  4. Ken H>

    Ken H>

    Dec 31, 2011
    Not only is that a 400 volt only motor, it's also a 50 hz. Not for use in USA except in special situations. You might try an Iron Horse motor. Many of us have had good luck with them. https://bit.ly/2JtxiXE

    The VFD looks like the last couple of VFDs I purchased - you'll be happy with it. Super easy to setup. Be sure to put a filter over the air inlets to protect the electronics from steel dust.
    12345678910 and seanj like this.
  5. Collin Johnson

    Collin Johnson

    May 16, 2019
    Ken H> likes this.
  6. seanj


    Mar 1, 2010
    I have an Iron Horse motor. It's an excellent value.
  7. Lieblad


    Jul 24, 2015
    Notice, this EBay is described as a syncronous motor.
    Thats not exactly bad, but depending on its specific type of rotor may take a couple extra brain cells turned on to use it.
    Last edited: May 19, 2019

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