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  1. #16
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    Quote Originally Posted by Humphrey9999 View Post
    Shame the schematic doesn't say exactly what the IGBTs are.
    Yeah, but the guy that posted on Mach 3 forums provided a link to an e-bay seller from where he got his replacements from. I traced it out, but the link was dead, so no help there.

    Here's the forum link where I got all this from - Huanyang VFD controller plugin
    It deals with communications and it's 32+ pages long!

    Found it... How's this?
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    Last edited by Malibu; 28th January 2013 at 09:39 AM. Reason: Added the link and a picture

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  3. #17
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    Quote Originally Posted by Malibu View Post
    Yeah, but the guy that posted on Mach 3 forums provided a link to an e-bay seller from where he got his replacements from. I traced it out, but the link was dead, so no help there.

    Doesn't really matter, since the number will be visible once the part is removed.

    After a quick search, I think they're FGA25N120ANTD 1200V 50A NPT Trench IGBTs. (A mouthful.) Can be verified as above.
    In Australia, I think they're stocked by RS Electronics.

  4. #18
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    Quote Originally Posted by Malibu View Post
    Yeah, but the guy that posted on Mach 3 forums provided a link to an e-bay seller from where he got his replacements from. I traced it out, but the link was dead, so no help there.

    Here's the forum link where I got all this from - Huanyang VFD controller plugin
    It deals with communications and it's 32+ pages long!

    Found it... How's this?
    That's where I've been getting my info too. Good to confirm that the IGBTs are FGA25N120ANTD. I just checked. RS have them for $6.80 ea before GST, here: -
    Buy IGBT Transistors Transistor,IGBT,with Diode,N-channel,50A,1200V,TO3P Fairchild Semiconductor FGA25N120ANTDTUX online from RS for next day delivery.

  5. #19
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    Quote Originally Posted by Humphrey9999 View Post
    I just checked. RS have them for $6.80 ea before GST
    That's a better price than buying a new inverter! Seems awfully cheap for RS too, unless they've gotten more competitive in the last few years?

    It occured to me while I was looking around internet for the schematic and other bits and pieces, just how many of these drives must be out there! Some good reports, some bad and most of them to do with parameter settings. (half the hits were from the CNC forum here on WWF), but they look to be everywhere!
    They seem to be an essential part of any CNC system, which makes sense for the price verses function features. I know when I've bought drives from SEW or Siemens over the years as an electrician, sometimes I'm staggered by the cost of the drives (which have only ever been 50hz outputs, except one, which was a high speed spindle drive from Germany... and the list price was $39k for that one...)

  6. #20
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    Quote Originally Posted by Malibu View Post
    That's a better price than buying a new inverter! Seems awfully cheap for RS too, unless they've gotten more competitive in the last few years?
    Might be even cheaper yet - it's possible that only one or both of the zeners is dead and that the IGBT is OK.

  7. #21
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    I found a source on eBay for 10 of there IGBTs for $25. Free postage.
    I would like to have at least three on hand for any (inevitable) mishaps with one of my three inverters....
    Does anyone want me to split this lot up and post some to you? $2.50 each plus $0.60 for local postage.
    Just an idea.
    Cheers,
    Joe
    9"thicknesser/planer, 12" bench saw, 2Hp Dusty, 5/8" Drill press, 10" Makita drop saw, 2Hp Makita outer, the usual power tools and carpentry hand tools...

  8. #22
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    Default Re: Can anyone repair a Huanyang VFD

    Quote Originally Posted by jhovel View Post
    I found a source on eBay for 10 of there IGBTs for $25. Free postage.
    I would like to have at least three on hand for any (inevitable) mishaps with one of my three inverters....
    Does anyone want me to split this lot up and post some to you? $2.50 each plus $0.60 for local postage.
    Just an idea.
    Please don't buy from eBay unless you know the seller personally. Electronics component are fake a plenty on EBay. Check prices at digikey or x-on.com.au they have reasonable pricing.

  9. #23
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    Quote Originally Posted by forp View Post
    Electronics component are fake a plenty on EBay.
    It's not just ebay. The company I work for recently wrote off 200k worth of assembled product because the manufacturer had sourced grey market components that didn't meet the datasheet specs (high speed BGA ADCs). Lawyers got involved, and it turned out cheaper to get them rebuilt, rather than reworked.
    Banksia pod turning: Lamps | Goblet tealights | Winged bowl

  10. #24
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    Quote Originally Posted by Humphrey9999 View Post
    Might be even cheaper yet - it's possible that only one or both of the zeners is dead and that the IGBT is OK.
    I'm the first to admit that this sort of stuff is a little above my knowledge base, although I might be able to muddle my way through it.
    But looking at the circuit, if the zeners are open or shorted, would that give the 0 ohms reading across the E-C of Q 20? It would make a little sense for the voltage readings taken if that were the case, but I would have thought it more likely that the internal diode would have copped a belt, hence the 0 ohms.

  11. #25
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    Gotta agree with sjm and forp - for the cost of a few bucks, better to stick with the Fairchild originals.
    For fast delivery, RS can't be beaten, but Mouser or Digikey are probably cheaper.

  12. #26
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    Quote Originally Posted by Malibu View Post
    I'm the first to admit that this sort of stuff is a little above my knowledge base, although I might be able to muddle my way through it.
    But looking at the circuit, if the zeners are open or shorted, would that give the 0 ohms reading across the E-C of Q 20? It would make a little sense for the voltage readings taken if that were the case, but I would have thought it more likely that the internal diode would have copped a belt, hence the 0 ohms.
    My eyes are at fault, I guess. Been having trouble with them lately, that's why I don't do any hands-on electronics any more. I could have sworn the short was E-G, not E-C. Sorry
    Won't be the (zener) diodes. Either the junction or the inherent protection diode, as you say.

  13. #27
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    Quote Originally Posted by jhovel View Post
    I found a source on eBay for 10 of there IGBTs for $25. Free postage.
    I would like to have at least three on hand for any (inevitable) mishaps with one of my three inverters....
    Does anyone want me to split this lot up and post some to you? $2.50 each plus $0.60 for local postage.
    Just an idea.
    3 inverters with 6 per unit is 18 IGBT's.
    25 bucks on 10 drivers for peace of mind is pretty cheap, even if half are below quality. I'd buy them as a last resort, but would prefer RS or Mouser

  14. #28
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    Quote Originally Posted by Humphrey9999 View Post
    My eyes are at fault, I guess. Been having trouble with them lately
    Yeah, I know what you mean!

    Hell, I'm having trouble keeping up with this thread! I hardly get a reply posted and there's another 3 postings done already!

  15. #29
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    Quote Originally Posted by forp View Post
    Please don't buy from eBay unless you know the seller personally. Electronics component are fake a plenty on EBay. Check prices at digikey or x-on.com.au they have reasonable pricing.
    Thanks for the warning! On further search, they are available from all sorts of reputable electronics dealers at around the same price and closer to the RS price.
    In any case, they are easily and cheaply available. No need to have stocks on hand after all.
    I expected them to be difficult to get for some reason.

    Also, I didn't twig that there were 6 in each inverter - I could only see three and assumed that there were 2 in each package. Wrong guess....
    Cheers,
    Joe
    9"thicknesser/planer, 12" bench saw, 2Hp Dusty, 5/8" Drill press, 10" Makita drop saw, 2Hp Makita outer, the usual power tools and carpentry hand tools...

  16. #30
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    My thanks to everyone who has kept this thread going. I wasn't able to reply because of the flooding. I only just got power back at 1 am last night.

    I have some things to do, but soon as I can I will take off the IGBT and measure it again and replace it if necessary.
    Bob Willson
    The term 'grammar nazi' was invented to make people, who don't know their grammar, feel OK about being uneducated.

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