[chbot] VFD with Chocolate fish.
richard.jones.1952 at gmail.com
Wed Jun 30 09:43:06 BST 2021
I got your VFD link to work by adding an 'l' to the .htm part:
On Wed, Jun 30, 2021 at 7:13 PM Mark Atherton <markaren1 at xtra.co.nz> wrote:
> Have you checked continuity between mains in and the bridge rectifier
> using a meter, or just by inspection ?
> Not sure of the rating of the unit you have purchased, but I might also
> expect some kind of power-factor correction before the main reservoir
> caps. Are you 100% sure that the input terminals don't dive off around
> somewhere and then back to the caps ?
> On 30/06/2021 7:08 PM, Mark Atherton wrote:
> > Sounds like the factory modified the product (wrongly) then shipped it
> > without testing it.
> > Three phase inputs (L1, L2, L3) should go the the bridge rectifier via
> > R, S & T.
> > I have a couple of 3 ph VSDs that don't trip with under voltage if you
> > use single phase, and attach phase to L1, and neutral to L2.
> > Before you go any further, what is the voltage rating of the reservoir
> > cap(s) directly after the bridge rectifier ?
> > I would expect at least 385V caps for the 240V model and 620V caps (can
> > you get these ?) for the 3 ph 415V variant.
> > -mark
> > On 30/06/2021 6:04 PM, Marshland Engineering wrote:
> >> I'm stumped with a VFD from Aliexpress. Here it is
> >> https://www.aliexpress.com/item/1005002038502819.htm
> >> Nothing turn on with power. As a true engineer, off came the cover.
> >> Now I'm
> >> either blind, missing something completely or its a faulty design.
> >> It has a 3 phase rectifier in it, + and - go to the HV caps. One of the
> >> phase input leads is cut off. Looks like a factory job. The other 2
> >> leads are soldered together on the PCB and go to the input live
> >> terminal. I
> >> cannot find any connection on the PCB from the neutral terminal.
> >> Stumped. Now
> >> I did get a complete new PCB when I discovered they sent me a 240V out
> >> instead
> >> of 380V one . It is exactly the same.
> >> Anyone got a few minutes free tomorrow ? I come loaded with chocolate
> >> fish or
> >> similar.
> >> Cheers Wallace
> >> 03 3237449
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