Have two Meanwell LPV150-24
Connected to each are 5meter white LEDS 24V 50W each
Used the shelly RGBW2 to control them. The problem is a high pitch noise coming from the LPVs. Any soution for this? Maybe some dampening material or even opening them and filling with something?
I think you have an oscillation high frequency transformer in there, which is not fully ok. Could be failing soon or sometimes the ferite plates are not fully glued together which can result in a pitch.
It seems unwise to dampen it with stuff inside, but that is your own decision, nor could it be wise to wrap it to tight in sound insulation for if the heat up, did you test that else they might give up in a flash.
My two cents this is. hope you get it solved
They are brand new and there are two of them with the same problem.
It has internal thermal protection so i believe it will just shutoff.
Looking at the data sheet there is a pwm control. Wonder what that is.
Sometimes it happens that even brand new items have this high pitched buzz, due to the switching transformer, it happens.
In the PWM control i see that it is being feedback controlled by an OVP probably over voltage protection and another detection circuit, what that detects it does not say. Could be surges, shut offs, or anything your guess as good as mine.
Thanks for the help. Appreciate it. Had to just use some insulation without hurting the airflow to solve the problem
Same thing happening here, to rule out moskovskiy82 electrical installation. Shelly RGBW2 and Meanwell LPV150, latest firmware on Shelly and high pitch noise, specially when the led strip is turned off.
Since the PSU and Shelly are inside the wall register, how did you insulate it? Just wrap PSU with foam? Did you check temps after that?
Mine is installed in the attic. So i’ve just added two more layers of rock wool below it. Still has plenty of airflow. As others mentioned wrapping the PSU is not an option due to temps.
I have just installed LPV150 with a Gledopto RGBWW controller and it works without any problem or noise. So i believe it’s a pair of Shelly + LPV which don’t match
What are the advantadges of the Gledopto besides the lack of noise? I cant see the Gledopto having a wall switch input as the Shelly has.
Can’t think of any.
Actually if i had to go back i would go for a fibaro rgbw 2. Looking at the amount of options and robustness of their dimmers (have around 12 of them) - seems like the best option
I can confirm I have the same issue with a LPV-150-24 and the Shelly RGBW2. The buzzing becomes apparant at around 100W load. Another Meanwell PSU - LRS-150F-24 has the same issue.
I’ll try without the Shelly in line…
Maybe it is related to this recent analysis: https://teardownit.com/posts/shelly-rgbw2-controller-and-shelly-duo-rgbw-bulb-dangerous-light-pulsations
ESPHome allows you to set the PWM frequency to 1000Hz (over the default 600Hz). Has anyone tried this with the Mean Well LPV series?
I replaced a Shely RGBW2 with an ESP32 based dimmer with a 10khz pwm frequency and the buzzing went away, at least under load. The LPV still buzzes a bit with very low load (=led’s off, just powering the ESP) ( magnetoconstriction ? ).
I can confirm that the meanwell HLG and XLG series PSU’s don’t have these issues. They are a bit more expensive though.
I think the LPV series are only suited if you either
Edit : I did look into a low pass filter as explained here, but browsing digikey tought me high-current inductors are expensive… and it likely would not have solved the no/low load noise anyway.
Hey I want to come back on this.
I am using 240w Meanwell XLG power supply at 24V on my setup with two shellys and I am experiencing the same issue (high pitch noice).
This was not so noticeable for 1 shelly on the supply, but with two it is very obvious.
As the PMW-frequency seems to be an issue, I would like to ask for shelly alternatives. I couldn’t really find products following the IEEE recommendations.
To get rid of at least the noise, I thought about a big capacity/high frequency filter too as supposed in the other topic.
But first: could anyone of you resolve the issue with another product?
Best
I have Shelly RGBW2s connected to 24v Meanwell XLG, HLG and ELG psu’s without noise. The ELG is 300W and has 2 Shellys connected, silent. My RGBW2s are flashed with ESPHome and set to 244 Hz PWM freq.
The Shelly Plus RGBW PM is ESP32 based so it likely can use a much higher PWM frequency to make the buzzing (under load) go away, but I haven’t tried that combination. I do have an ESP32 based DIY (Quinled An Quad) hooked up to a XLG 200w, wich is silent to my ears with a 20kHz pwm frequency.
@rvdm sorry to hijack this post, but I see you’re using the HLG series with a Shelly RGBW2 and I’d be interested to understand how that works.
Currently my set-up is as follows:
I was thinking of installing a Shelly Plus 1PM or something similar behind the light switch, so that I can turn it on/off using Home Assistant. But that doesn’t allow me to dim the LED strip.
However given that the cables to control the dimming are not at the light switch, but instead are close to the LED strip, I don’t see how I can solve that easily.
The best I can come up with is this (I’m using here the SHelly Plus RGBW PM as the RGBW2 is no longer being sold):
Thanks for any advice you could provide!
I use HLG series power supllies without dimming input, as that’s a bit redundant if you want to use a Shelly RGBW dimmer in combination with a single led strip. Also Meanwell power supplies with dimmign options are more expensive. I suggest reading the meanwell data sheets to figure out which model numbers have dimming as the psus usually come in a few varieties.
I use non-dimming meanwell power supplies with the Shelly RGBW2, which includes a separate optocoupler (my assumption, it’s a heatshring wrapped device) which allows you to control the DC based shelly dimmer with an AC signal which the coupler converts to harnless DC. See this schema https://kb.shelly.cloud/__attachments/243531777/White_led_bulb_shelly.png?inst-v=a5953c58-12ed-4054-8602-6e964747a847
That’s the best way, and could be compatible with a RGBW PM but alas the optocoupler is no longer included. A shelly plus can be used to pickup a button press, but is slightly overkill. A Shelly plus i4 is better suited for such a role. The downside of this solution is that the button no longer works without HA and/or Wifi, while the RGBW2 optcoupler always works. DIY’ing an optocoupler should be possible, but given the 220 V ac side not beginner-friendly.
Thanks for the explanation @rvdm.
I indeed bought a fairly expensive HLG power supply at the time, hoping I would be able to use those dimming features at some stage, without really understanding how they work.
The solution you explain with the octocoupler indeed looks neat, but would not work for me as I don’t have the live wire going to the HLG power supply (I put a red cross on the image below).
So I guess I would need to use a complex solution like the one in my previous post.
Though it might be better to use a Shelly-plus-0-10v-dimmer.
That I could connect to the dimming wires on my HLG power supply.
Like the power supply, it would receive its power from the live wire after the switch. So it would only be able to function after I have turned on the switch (which I’d do with the Shelly Plus 1PM which in this case would not be in detached mode).
