VFD for 5.5 kw spindle


Results 1 to 11 of 11

Thread: VFD for 5.5 kw spindle

  1. #1
    Member
    Join Date
    Jun 2005
    Location
    Canada
    Posts
    10
    Downloads
    0
    Uploads
    0

    Default VFD for 5.5 kw spindle

    I purchased a Jianken 5.5 kw (7.5 hp) spindle and would like opinions on which VFD to purchase for the unit. The spindle is 220v 14.6 amps. I only have 220v single phase available. Would I need to purchase a 15 hp VFD? Or would a 7.5 hp Hitachi P1-00330-LFUF be sufficient?

    Thanks for all help.

    Similar Threads:


  2. #2
    Member Karl_T's Avatar
    Join Date
    Mar 2004
    Location
    Dassel.MN
    Posts
    1542
    Downloads
    2
    Uploads
    0

    Default Re: VFD for 5.5 kw spindle

    It would work, but the VFD will be your weak link. A wiser choice would be a 10hp hitachi VFD. Some may call for the 15 hp. but that's overkill, IMHO.



  3. #3
    Member mactec54's Avatar
    Join Date
    Jan 2005
    Location
    USA
    Posts
    15362
    Downloads
    0
    Uploads
    0

    Default Re: VFD for 5.5 kw spindle

    Quote Originally Posted by dakmon View Post
    I purchased a Jianken 5.5 kw (7.5 hp) spindle and would like opinions on which VFD to purchase for the unit. The spindle is 220v 14.6 amps. I only have 220v single phase available. Would I need to purchase a 15 hp VFD? Or would a 7.5 hp Hitachi P1-00330-LFUF be sufficient?

    Thanks for all help.
    14.5 amps seems low for a 5.5Kw motor

    The VFD Drive input rated Amps is the most important when using Single Phase for this 14.6 amps the VFD Drive input amps has to be no less than 27 Amps rated input amps, the supply would want to be 35 / 40 Amps this is right at the max spindle motor size for Single Phase use why did you go so big when you new you where going to run it on Single Phase

    So you just can't guess the VFD Drive size buy a big drive is not always the answer

    Mactec54


  4. #4
    Member
    Join Date
    Jun 2005
    Location
    Canada
    Posts
    10
    Downloads
    0
    Uploads
    0

    Default Re: VFD for 5.5 kw spindle

    Really did not think through the VFD prior to purchasing the spindle. Should have gone with a 5 hp spindle, however if I can make it work with a 10 hp VFD I will do that.



  5. #5
    Member Karl_T's Avatar
    Join Date
    Mar 2004
    Location
    Dassel.MN
    Posts
    1542
    Downloads
    2
    Uploads
    0

    Default Re: VFD for 5.5 kw spindle

    Quote Originally Posted by dakmon View Post
    Really did not think through the VFD prior to purchasing the spindle. Should have gone with a 5 hp spindle, however if I can make it work with a 10 hp VFD I will do that.

    Actually, you were REALLY SMART to do that. the VFD / 3 phase is constant torque. Hp is torque times RPM. So at 1/2 speed you have half the horses. At 10% speed 10% the horses ya da ya da. So you need the extra power to run low speeds.



  6. #6
    Member
    Join Date
    Jun 2005
    Location
    Canada
    Posts
    10
    Downloads
    0
    Uploads
    0

    Default Re: VFD for 5.5 kw spindle

    Thanks Karl, but I have never been accused of being really smart, however sometimes things work out for the better and hopefully that is the case here.



  7. #7
    Member mactec54's Avatar
    Join Date
    Jan 2005
    Location
    USA
    Posts
    15362
    Downloads
    0
    Uploads
    0

    Default Re: VFD for 5.5 kw spindle

    Quote Originally Posted by dakmon View Post
    Really did not think through the VFD prior to purchasing the spindle. Should have gone with a 5 hp spindle, however if I can make it work with a 10 hp VFD I will do that.
    Is the spindle a 2 Pole or a 4 pole and what was the max Hz in the spindle spec's as the VFD has to be able to also have the Hz rating to match your spindle

    Mactec54


  8. #8
    Member mactec54's Avatar
    Join Date
    Jan 2005
    Location
    USA
    Posts
    15362
    Downloads
    0
    Uploads
    0

    Default Re: VFD for 5.5 kw spindle

    Quote Originally Posted by Karl_T View Post
    Actually, you were REALLY SMART to do that. the VFD / 3 phase is constant torque. Hp is torque times RPM. So at 1/2 speed you have half the horses. At 10% speed 10% the horses ya da ya da. So you need the extra power to run low speeds.
    No that is incorrect unless you have a VFD Drive that can run in Sensorless Vector Mode which can give you constant torque, a normal V/F drive will not give you constant torque

    Mactec54


  9. #9
    Member
    Join Date
    Jun 2005
    Location
    Canada
    Posts
    10
    Downloads
    0
    Uploads
    0

    Default Re: VFD for 5.5 kw spindle

    Mactec54;

    Sorry for late reply but it is a 2 pole 400Hz spindle. The Vfd that I am looking at can run in Sensorless Vector Mode. Which would be a wiser choice between these 2 drives?

    P1-00460-LFUF
    WJ200-075LF



  10. #10
    Member mactec54's Avatar
    Join Date
    Jan 2005
    Location
    USA
    Posts
    15362
    Downloads
    0
    Uploads
    0

    Default Re: VFD for 5.5 kw spindle

    Quote Originally Posted by dakmon View Post
    Mactec54;

    Sorry for late reply but it is a 2 pole 400Hz spindle. The Vfd that I am looking at can run in Sensorless Vector Mode. Which would be a wiser choice between these 2 drives?

    P1-00460-LFUF
    WJ200-075LF
    Sensorless Vector is the best choice if it will work at up to the 400Hz a lot of Sensorless Vector drives don't function very well at the higher Hz rating and will not auto tune correctly, so you may have to fool the drive and temporary set to a lower Hz setting, ( Like 300Hz ) and then auto tune and then set it back to the 400Hz

    The Sensorless Vector Drives will run the spindle a lot smoother normally and have a better overall performance

    Mactec54


  11. #11
    Member
    Join Date
    Mar 2017
    Location
    United States
    Posts
    926
    Downloads
    0
    Uploads
    0

    Default Re: VFD for 5.5 kw spindle

    I run a 5.6kw / 7.5hp 24,000 rpm 220v 20a PDS 3ph spindle from a domestic 1ph 240v circuit. There's plenty of VFD options at various price points.

    I use a Huanyang 7.5kw vfd designed for 220v 1ph in / 220v 3ph out. It works fine and I've been using it to mill aluminum at 24,000 rpm so I've not exactly been babying it.

    My 240v circuit is 50a (which is plenty for my spindle).

    There's a bunch of other generic Chinese variants on ebay too. E.g.

    https://www.ebay.com/itm/22440760865...Cclp%3A2334524

    There are also VFDs that can run 380v 3ph spindles from 240v 1ph outlet. And ones that go up to 1500hz.

    If money is no object then you could just get one of the premium brand VFDs. They don't usually offer 1ph in that size so you'd have to double the size (so a 15hp 3ph vfd to run a 7.5hp 3ph spindle from a 1ph outlet).



Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

VFD for 5.5 kw spindle

VFD for 5.5 kw spindle