XW+ Pulsing with Air Fryer Load

[hogback]

I get that the load is resistive, but the sound from the xw is quite pronounced, and I'm worried that it's causing excessive wear to the inverter. Should I not worry? It's an 1800W unit, and even pulses on heat-up, which I think is silly. It's stated it's for more even heat, which could have been had with a different element imo. Once in awhile I run my 4kW 240V coffee roaster at less than 100% power, and the pid pulses don't make the same racket. We use the air fryer for extended (hour) times regularly.

 

[DIYrich]

It may be a "resistive" load. But the controller/thermostat may be pulsing power to the heating element.

 

[Brucey]

Which air fryer model is causing this? Would be good to know to avoid.

 

[hwy17]

I notice some pulsing of the XW's control frequencies. At certain times it can turn into a sort of waugh waugh waugh that I can actually hear in odd places, like in the coil whine of a PC power supply across the house.

I don't worry that it's gonna hurt it. But I am curious if we can ever smooth out these things with rotational mass.

 

[ricardocello]

I notice some pulsing of the XW's control frequencies.

These are crazy expensive, but an EMC filter on the circuit to the air fryer would probably fix it.

https://www.phoenixcontact.com/en-us/products/emc-filters

There are some el-cheapo ones on amazon (board level), but I wouldn’t trust them not to burn up.
And I think we are all a little more cautious about things burning up lately.

 

[hogback]

It's a current model Breville air-fryer. I could understand some pulsing with a crummy pid in on-off mode for temp regulation when at/near temp, but the pulsing during warm up is poor design in my opinion.

I wonder if a 240V European model would cause the same audible effect from the XW?

I think for now I'm just going to use it and see what happens. My biggest issue is my own anxiety with the wear, and that that if it fails before too long, I'll always wonder if it was the oven, and probably blame it in any case because that's just what we humans do, unfortunately.

 

[Brucey]

It's a current model Breville air-fryer. I could understand some pulsing with a crummy pid in on-off mode for temp regulation when at/near temp, but the pulsing during warm up is poor design in my opinion.

I wonder if a 240V European model would cause the same audible effect from the XW?

I think for now I'm just going to use it and see what happens. My biggest issue is my own anxiety with the wear, and that that if it fails before too long, I'll always wonder if it was the oven, and probably blame it in any case because that's just what we humans do, unfortunately.

I have a couple different air fryers I can try on my Victron 48/1200, not a Schneider but prob just as perturbed with draws like that.

 

[hwy17]

Hey you're in the SC mountains! Maybe our XW+ are ringing for each other, like a mating call.

 

[hogback]

Maybe it is agitated with the presence of two xwpros in a nearby building....

 

[Brucey]

Hey you're in the SC mountains! Maybe our XW+ are ringing for each other, like a mating call.

 

[hwy17]

Maybe it is agitated with the presence of two xwpros in a nearby building....

 

[rustyrotors]

i wonder if the air fryer uses an SCR to reduce power, same with a typical hair dryer on low setting. it only pulls power from one side of sine wave output, which causes the transformer to saturate and draw a lot of current, also may mess with voltage regulation. i think it stresses the power caps in the inverter the most, they have to absorb the current spikes. a line filter may help smooth out the sine wave and lower stress on the inverter

 

[400bird]

I don't have a solution other than a different air fryer or rewiring the one you've got.

My ovens/air friers run on such a slow PWM dreque that I can hear hr XW pulse in and off, but the on/off cycles are like 20 seconds to 3 minutes (once heated up)
I wonder if yours is cycling on and off at grid frequency or running half wave causing problems like rusty rotors points to.