Thread: Thor, or should that be Zeus?
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16-10-2017 #441
Ah, braking resistors. Even on my 4KW spindle, I keep getting issues where when I stop the spindle, my VFD goes into overvolt trip. Pain in the ass. Anyone have a view on what size resistor I need for the Hyanyang VFD for this spindle?
Thanks
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16-10-2017 #442
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16-10-2017 #443
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16-10-2017 #444
Download a manual for a decent brand of VFD, which actually lists braking resistor sizes, and see what they recommend for a similar sized VFD/Motor combination.
Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
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16-10-2017 #445
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16-10-2017 #446
Some research done. Seems the Chinese VFDs dont come with the internal circuitry to use a braking resistor. Will need to clarify that first.
From what I can tell, values are between 30 - 70 Ohm and around 300W.
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16-10-2017 #447
totally not jealous....
Serious machine you have there Chaz. You must be chuffed!
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24-01-2018 #448
Nice machine
I have hsd 919 on my machine. I run from single phase using a dual stage vfd. 220 in 380 out.
Stops in3 second no problem
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24-01-2018 #449
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25-01-2018 #450
My machine has been running about 2 years using huanyang gt series. Il have to find exact model number. The only downside- no braking resistor relay as standard- its special order- but only £5. Also must be modified to run modbus ( I've done this)
I have what seems to be better made "copy" of the same unit here on test too. Has braking interface and is modbus compatible from the factory- even though they don't supply modbus instructions- took me a week to work out how to talk to it. ( I can share the info)
220 single in 380 out.
On my machine running had 919 spindle I rarely see more than 5 amp current draw from the main supply.,
Ecogoo 9100-00750-G-B
While they have a max current draw of 34 amp mine is still working as I originally wired it for test from a 13a plug.
Ecogoo can be found on aliexpress. Delivery was free and only took a few days to arrive. Just checked price at ££251 today
That's the one I'd recommend
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