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Building them as fast as I can and Sid is getting that daisy chain code to me really soon.
1 hour ago, Sean Genetry Solar said:
Refreshing You tube page over and over waiting to see it for my self if it works lol. Then I know my babies are on their way. . .
Not so fast...code'll probably come before the YT videos...
Tests today have it working fairly decent. Works alright, just 2 tweaks I need to do:
- MASTER: slow down the frequency shift, so it's not instantaneous. Synchronous motors don't like an instant 1Hz shift...
- SLAVE: had a weird bug where something went wonky (surge load) and it shut down with an input voltage alarm. Somehow it got set to 80Hz...still trying to figure out how that happened.
Not so fast...code'll probably come before the YT videos...
Boohoo. . . Well, at least the Star Ship 15 Landed, thats a good thing. I just got my second 3d printer up and running in a hour and half and already printing away. Maybe the vid will be up tomorrow. . . Yeah 80hz would be a bad day in my house. . .
Kinda rough when the engineer has to catch up with the sales department..........I'm trying <a contenteditable="false" data-ipshover="" data-ipshover-target="/profile/3-the-blind-wolf/?do=hovercard" data-mentionid="3" href="/profile/3-the-blind-wolf/" rel="">@The Blind Wolf, I'm trying! Biggest issue is that it's what you're living on, it needs to work right!
10 hours ago, Sid Genetry Solar said:Not so fast...code'll probably come before the YT videos...
Tests today have it working fairly decent. Works alright, just 2 tweaks I need to do:
- MASTER: slow down the frequency shift, so it's not instantaneous. Synchronous motors don't like an instant 1Hz shift...
- SLAVE: had a weird bug where something went wonky (surge load) and it shut down with an input voltage alarm. Somehow it got set to 80Hz...still trying to figure out how that happened.
That 80Hz would be interesting to feed into the VFD. If it operated at the same ratios as currently on 60Hz, I could spin the 800 RPM motor up to 2600 RPM. It already runs at 2000 RPM. Think that 3 of the inverters in three phase mode could get to 600 Hz?🤪
5 hours ago, Waterman said:That 80Hz would be interesting to feed into the VFD. If it operated at the same ratios as currently on 60Hz, I could spin the 800 RPM motor up to 2600 RPM. It already runs at 2000 RPM. Think that 3 of the inverters in three phase mode could get to 600 Hz?
Not currently. Frequency range should be 40-70Hz. Transformer isn't designed for high frequency operation, and it'd be a completely different product to try to run higher frequencies.
Don't think a VFD cares about the AC input frequency one bit; my guess (from not having one) is that the input AC is immediately rectified to DC, then switched through a 3-phase driver at the desired frequency.
Kinda rough when the engineer has to catch up with the sales department.....
That describes most businesses and products these days except that most places there is little to no actual communication between the sales department and the engineering/design/manufacturing department except when the bean counters get involved and they need a product to fail after a specific (generally very short) lifecycle.
Not currently. Frequency range should be 40-70Hz. Transformer isn't designed for high frequency operation, and it'd be a completely different product to try to run higher frequencies.
Seems Sean is scrambleing to get the GS inverters out. . No Big Deal right Sid? ? ? *evil Smirk*
Just waiting on that wifi update. . . .
Not currently. Frequency range should be 40-70Hz. Transformer isn't designed for high frequency operation, and it'd be a completely different product to try to run higher frequencies.
You might be surprised at the transformer. I have one of PJ's step up / step down units that is designed for 50/60 cycle use. It worked just fine at up to 400 Hz.
They do rectify it from AC to DC at the start but I also think that they use the input frequency to control the output. The unit I have is a bit strange in that it is setup to allow for 4 wire input at 110Volts. Not many places in the US use 3 phase 110. I need to hack the system in one as they say they are rated 0-400Hz but yet when new, if you dig around in the parameters you find that it doesn't work out of the box because it is set for auto 800Hz output. I have yet to find one of the BLDC Smartdrive washer motors that can spool up as fast as they have it set for ramping up at that setting. Changing the ramp up speed also resets the max Hz down to 400. If I could control it, then I could use a Smartdrive to directly drive a 3600 RPM alternator.
48 minutes ago, The Blind Wolf said:Seems Sean is scrambleing to get the GS inverters out. . No Big Deal right Sid? ? ? *evil Smirk*
Just waiting on that wifi update. . . .
Still trying. Not too surprised to find that I have to take load info from the WiFi board to get both phases...which is a lot slower reacting than the current sensor on the mainboard. Should still work...if a little slower to react.
Still trying. Not too surprised to find that I have to take load info from the WiFi board to get both phases...which is a lot slower reacting than the current sensor on the mainboard. Should still work...if a little slower to react.
Is that going to cause a issue with say a wash that cycles on and off? Also my 3d printers they come on and off I'm guessing to keep it heated. it'll kick on like at 150watts for a few seconds then hit 325watts for another few seconds then kick off while printing.
I not sure how reliant they are to the hz, cause I know some things use that to mesure timeing.
Small wattage loads won't be a problem. Inverters might oscillate a bit as they try to balance the load, but they should be fine.
It's the big loads >6kw switching on/off that could cause a few hiccups/errors.
There is no way around adjusting the frequency for the inverters to communicate...without redesigning the control board and figuring out a complicated feedback/load sharing cable. Most modern appliances could care less about frequency shift...though some older devices with a clock probably won't keep good time.
A possible immediate solution would be to set both inverters up for 120v single-phase (50A), and run them in split-phase sync for 240v (one inverter per phase). No frequency shift, and it will work right now. "Master" inverter could run 120v charge...and incidentally, the "slave" inverter will provide the other phase. (Which poses a bit of a problem for battery charge if the generator can't offset the total system load...it's kinda hard to fill something up if it's being drained faster than it is filled.)
2 minutes ago, Sid Genetry Solar said:Small wattage loads won't be a problem. Inverters might oscillate a bit as they try to balance the load, but they should be fine.
It's the big loads >6kw switching on/off that could cause a few hiccups/errors.
Which is a drier, stove. Are you still making them both work at the same time shareing the loads? or still only haveing one handle all the load until it hits a wall? Seems if both are shareing then that would handle the power requirment more easier then just one doing all the work then begging to the slave to help me, help me.