Forum Discussion
BFL13
Aug 11, 2018Explorer II
I thought I was getting something I was looking for when Gordon Three posted:
" A well designed appliance or device should not pollute the upstream supply with noise. That said, it CAN and WILL happen. My Vizio TV does "something" to the AC supply coming from my Magnum, such that I can hear a pitch change in small ac-powered fans that are running when I turn on the TV. The TV takes an AC cord directly, there's no external power brick. It could be the TV's active power factor correction circuitry is cleaning up the AC waveform in some manner.
I recently bought an induction cooktop, a cheap Chinese unit from Amazon, and it puts out all sorts of noise, I don't know if it's radiated or on the AC line. Often it causes my infrared remote control to stop working for the TV.
The inverter does have filters on the AC output stage, since the PSW starts life as an MSW, just with many more steps. That MSW runs through filters and smoothing and comes out "pure". Those filters will help to protect the inverter's output stage (mosfets) from noise "
But then he and the rest seemed to go against that later on--I am unclear on the whole thing, still.
" A well designed appliance or device should not pollute the upstream supply with noise. That said, it CAN and WILL happen. My Vizio TV does "something" to the AC supply coming from my Magnum, such that I can hear a pitch change in small ac-powered fans that are running when I turn on the TV. The TV takes an AC cord directly, there's no external power brick. It could be the TV's active power factor correction circuitry is cleaning up the AC waveform in some manner.
I recently bought an induction cooktop, a cheap Chinese unit from Amazon, and it puts out all sorts of noise, I don't know if it's radiated or on the AC line. Often it causes my infrared remote control to stop working for the TV.
The inverter does have filters on the AC output stage, since the PSW starts life as an MSW, just with many more steps. That MSW runs through filters and smoothing and comes out "pure". Those filters will help to protect the inverter's output stage (mosfets) from noise "
But then he and the rest seemed to go against that later on--I am unclear on the whole thing, still.
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