Messages

1

Finished Plugins for Download / Re: Huanyang VFD controller plugin

« on: March 24, 2016, 12:09:05 PM »

I know this is an old topic, but I thought I'd add some up to date information about the braking components.

I've recently bought another Huanyang VFD with the intention of fitting the braking components and upgrading the VFD on my lathe. Having taken the new VFD apart, it's clear they've done a partial re-design of the PCB.





The new board has two individual current sensors on the ouput, rather than a single sensor on the DC bus. There is no longer any provision for the braking IGBT or gate drive, however the P+ and PR terminals are still there and the holes for the wire link.

2

Finished Plugins for Download / Re: Huanyang VFD controller plugin

« on: October 30, 2012, 07:28:43 AM »

I've used these on work projects;

Trouble free and isolated too at a sensible price.

http://kksystems.com/english/html_files/product_pages/usb485.htm

3

Finished Plugins for Download / Re: Huanyang VFD controller plugin

« on: July 20, 2012, 11:40:17 AM »

As far as I'm aware they ALL have RS485 connections, they're the RS+ and RS- terminals.

Were you looking for some kind of special connector? There are no standards for RS485 connections (or far too many depending on how you look at it).

What may be an issue is that they often don't have the RS485 driver chip (surface mount) fitted and you'd need to solder one in.

I had to add optocouplers for the auxillary outputs (part of an inlerlock system on my cylindrical grinder).

For those who've been thinking about adding the braking components; I've got my lathe set to 0.1s decelleration time but with PD118 (Over-voltage Stall Protection) set active (0). That gives me a pretty fast stop even from high motor rpm in top gears. You can hear the decelleration cutting in and out as the VFD limits the bus voltage.

4

Finished Plugins for Download / Re: Huanyang VFD controller plugin

« on: March 29, 2012, 12:03:04 PM »

I think the resistor pair R8a,b and the relay K1 were meant to be in rush protection for the capacitor bank, but it should have been inline between the bridge and the positive side of the capacitors to be effective. That's why the relay has been hard wired to be energized all the time. To get around this error the have probably used high ESR capacitors in the bank.

Just been reading through this thread as I've been looking into adding the braking components.

My take on the relay and resistors is that they're part of a shorted power stage detect. If one of the half bridges has shorted out, then the resistors limit the fault current.

5

Mach4 General Discussion / Re: New people welcome !! Come in here and introduce your self!

« on: March 19, 2010, 12:00:52 PM »

Hi all,

Another one from the UK. This came home a couple of weeks ago;









And I'm in the process of cleaning it up ready to have a rewire.

I've got Dugong servo drives and smoothstepper on order for the upgrade.

Paul
Luton UK
www.morini-mania.co.uk