Does this affect the lifetime of the power supply? I'm not talking about the cheap ones, this happened to me with the Meanwell HLG series in an art installation. It was like a symphony of the same high pitch coming from various different places as the LED strips changed colors and brightnesses. Probably the same pitch as the DMX decoders/dimmers' PWM frequency. From what I've been reading online, this happens sometimes and is a nuisance, but nobody really talks about the effect on reliability and longevity. Apparently, it's either a piezoelectric effect in ceramic capacitors or a magnetic force from inductors. The noise itself doesn't matter to me, I just don't want the power supplies to fail in a few months.
This has happened to me only once in the past, and I eliminated the noise, practically speaking, by wiring low-ESR capacitors between DC ground and the load side of the fuses, so basically between the DC terminals plus the resistances of the fuses. That may not be a good solution in this particular case because it can increase inrush currents at turn-on, unless I add creative switches that won't spark and blow the fuses, and the installation is in another state but I'm back home now.
Any thoughts? Everything is within the ratings of the devices.
This has happened to me only once in the past, and I eliminated the noise, practically speaking, by wiring low-ESR capacitors between DC ground and the load side of the fuses, so basically between the DC terminals plus the resistances of the fuses. That may not be a good solution in this particular case because it can increase inrush currents at turn-on, unless I add creative switches that won't spark and blow the fuses, and the installation is in another state but I'm back home now.
Any thoughts? Everything is within the ratings of the devices.