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Thread: VFD Search

  1. #1
    Join Date
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    Default VFD Search

    For some reason I am not getting any hits when I search for posts with VFD, VSD, Inverter drive or Huan Yang, and the reason I am looking for info is that I recently assisted PDW by removing a small horiz. mill with Vert. attachment, and other tooling, + a big lump of swedish shaper and a camel-backed drill, to give him some space, - anything to help the poor feller out
    The shaper has gone to a friend and nearish neighbour, and the other two are at our Community Shed. We have no 3 phase at the shed, and the mill has a 1HP 3Phase motor. I have not checked yet to see if it has the star point bought out or not, and am hoping and assuming that it was not wound 415V delta. I will check all that out on Friday, and assuming all is good, will be after an inverter drive.
    I found these the other day, and wonder if they are close to the best deals going at the moment, or am I missing something?http://www.ebay.com.au/itm/2HP-1-5KW...item1e9bf60700

    I also found this, which I assume is a vector drive, and technically superior to the Huan Yang. I also assume that for the purposes of running a small mill with a 1 H.P motor, that there would be little justification in paying the extra for this drive
    http://www.ebay.com.au/itm/SAJ-1-5KW...item2a14a40007

    Would any of the more experienced VFD ers care to comment?
    I should also add that for now I envision using the VfD to generate 3 phase, and maybe to give a small variable speed range which may be used to reduce chatter, and not so much as to seriously reduce the need for belt and pulley changes when we change speeds. Many thanks,
    Rob

  2. #2
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    I get 510 hits when I search for VFD in eBay....
    The mfirst one you picked is a really good price. Grab it.
    Cheers, Joe
    retired - less energy, more time to contemplate projects and more shed time....

  3. #3
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    Thanks Joe, for the advice on the VFD. I will check on Friday to make sure that the motor will suit, ie. not wound 415V delta, and hopefully with star point in terminal box.
    I meant hits on Ubeaut WWF or rather no hits on the forum when I did a search for info, not eBay hits. As you say, there is no shortage there. Thanks for the v quick response, and all he best,
    Rob

  4. #4
    BobL is offline Member: Blue and white apron brigade
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    I had one of those SAJ units on my MW lathe since 2011 and I have 5 HYs on my other gear

    In terms of setup and day to day use I don't think the SAJ is any better than the HYs'

    There may be differences in longevity etc - I guess time will tell.

  5. #5
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    The SAJ on my lathe works fine, but it has one annoying quirk - the cooling fan runs continuously.
    Ok in a production shop, but quite intrusive in a quiet personal one.
    But, it does have the Sydney supplier, 1 year warranty, an identifiable factory in China with a wide product range, and a great manual.

    My HY, used intermittently on the mill and lathe, shuts the fan off after use.

    A recent incident with US labelled electronics that did not meet the published datasheet led me into the subject of counterfeit (ie cheap) parts and the problems that is causing all manufacturers worldwide.

    John

  6. #6
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    Quote Originally Posted by Ropetangler View Post
    Thanks Joe, for the advice on the VFD. I will check on Friday to make sure that the motor will suit, ie. not wound 415V delta, and hopefully with star point in terminal box.
    I meant hits on Ubeaut WWF or rather no hits on the forum when I did a search for info, not eBay hits. As you say, there is no shortage there. Thanks for the v quick response, and all he best,
    Rob
    The vBulletin software has a problem with 3 letter searches, if you want to search on 3 letters you have to do it via Google search, like this

    vfd site:woodworkforums.com

    It got me 2510 hits on this forum!

  7. #7
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    Default Thanks "Fellers"

    Thanks Bob for your input, that is exactly the kind of end user experience report that I was after. I imagine that the SAJ has a lower usable frequency while still having enough torque, but I don't envisage using the vfd in that way as mentioned earlier. Thank you John for your input too, while I will most likely go with the HY, if the motor is suitable, the decision will be driven by cost mainly, once basic suitability of the unit is verified. I will say though if the fan situation had been reversed, I probably would have gone with the SAJ. That kind of irritating sound is something that I find hard to take.
    Thanks Fred for the explanation for the lack of hits. I don't often do a search on this forum and sometimes I get what I am after and sometimes very little at all. That may be the reason why, I will keep it in mind when next I search, (well as well as I can keep anything in my mind)
    Rob

  8. #8
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    I have 2 SAJ's, one runs a metal lathe, the other a wood lathe.

    They have been great, I would buy them again if I need another one.
    ​Brad.
    Every Day might not be a good Day,
    but there is something good in every Day.

  9. #9
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    I run a Huanyang VFD on my Deckel FP2 wired up to the original switch gear. It hasn't missed a beat. I wouldn't hesitate in buying another if the need arose. I have mine mounted "in" the Deckel behind a cast iron door. I can hardly hear the fan.. it is like a quiet little mouse compared to he noise of the FP2 at 2,000rpm.

  10. #10
    BobL is offline Member: Blue and white apron brigade
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    Quote Originally Posted by Ropetangler View Post
    Thanks Bob for your input, that is exactly the kind of end user experience report that I was after. I imagine that the SAJ has a lower usable frequency while still having enough torque, but I don't envisage using the vfd in that way as mentioned earlier.
    I don't think it's any better at low frequency torque than the HY units.

  11. #11
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    That is interesting Bob, perhaps I am mistaken but I'm under the impression that the SAJ was a vector drive which are supposed to have more torque at low Hzs. Perhaps I am wrong about the SAJ units. Thanks again to all who have contributed, but for my disposable income level, it is hard to justify the premium of the SAJs over the HYs for a limited benefit. I do like the idea of a good manual though I must say, just not enough to pay an extra $98 for it. Tomorrow I should be able to determine the suitability of the motor for use with any vfd with 240V 3phase output. I will keep you posted
    Rob.

  12. #12
    BobL is offline Member: Blue and white apron brigade
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    Quote Originally Posted by Ropetangler View Post
    That is interesting Bob, perhaps I am mistaken but I'm under the impression that the SAJ was a vector drive which are supposed to have more torque at low Hzs. Perhaps I am wrong about the SAJ units. .
    Direct comparisons between the SAJ and the HY are tricky because they are not being used on the same machine/motor./task
    What I can tell you about is drilling on the lathes and the drill press which also uses an HY.
    On all three I have to change pulleys for larger bits, slightly less so for the DP which has a 1.5HP motor whereas the others are 1HP

    Thing is I have the gear (de Prony Brake) required to measure the output torque directly but it can't be used while the motor/VFD are on machines and it will require a some disconnects.
    I already have the data for the HY so it would just be a matter of disconnecting the SAJ and mounting it in the Brake.

    Might do that when I get a spare moment - HAH

  13. #13
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    Quote Originally Posted by Ropetangler View Post
    That is interesting Bob, perhaps I am mistaken but I'm under the impression that the SAJ was a vector drive which are supposed to have more torque at low Hzs. Perhaps I am wrong about the SAJ units. Thanks again to all who have contributed, but for my disposable income level, it is hard to justify the premium of the SAJs over the HYs for a limited benefit. I do like the idea of a good manual though I must say, just not enough to pay an extra $98 for it. Tomorrow I should be able to determine the suitability of the motor for use with any vfd with 240V 3phase output. I will keep you posted
    Rob.
    Rob, vector technology is a matter of price. You always and invariably get what you pay for.

    If you are locked into these two China made low cost VFD brands, both Huanyang and SAY do make both types of VFD. The simple and cheap "V/Hz" type, and the always more sophisticated and more expensive "Sensorless Vector" type.

    As a rule, if the advertising blurb does not specifically say that it is a vector type, then you can be 100% sure that it is not! Vector drives are the newer technology and much much better at low speeds, and that is why they are much more desirable, and invariably cost more.

    Nowdays, it is fair to say that V/Hz VFD's are the economical choice for simple applications such as fans and water pumps. Whereas Vector VFD's are the choice for more demanding applications such as machine tool spindle drives. It is very much like comparing a 1960's aspirated diesel taxi to a modern 4WD with common rail turbodiesel.

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