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Projects, Designs, and Technical Stuff / Re: 3D printing company similar to PCBWAY for circuit board
« Last post by sleemanj on Today at 12:51:43 am »As above PCBWay, also JLC does it https://jlc3dp.com/
and its not a problem for them because you managed all three companies and saw software implementation for a hardware power systems control go down smoothly?
For Totem pole PFC you will need a very good software engineer, who also understands the finer detail of high power SMPS.....and can implement software control loops for the current and voltage in the PFC......and every time you want to modify your power supply in some way, you'll have to have that software engineer still available to you.
its a crux if there ever was one. Treez is wanting to bleed less money. I can understand that, actually, and it makes sense that removing a software requirement would make things go smooth.He doesn't need to invest in software and build a totem pole PFC. Dev boards for totem pole PFC's with efficiency plots can be found from TI, ST, Infineon,... He must build his proposed PFC and prove everyone wrong.
I asked if the design would have to be marginal before there was a problem? And you replied, yes, the design would have to be marginal. So I don't see any disagreement here?We are in agreement in everything. I was not referring to these specific PSUs but rather to a general statement that voltage or frequency do not matter ever. That is too broad and needs some qualification. I am well aware that it has been determined the PSUs in this case do not need any adaptation.
To avoid generalization, the power supplies in this case are specified with an input rating of 85 - 264 V AC or 120 - 370 V DC, and an AC frequency range of 47 - 63 Hz. There is also a derating curve for low voltages. It is to be assumed that they will perform to specification.
One other thing, the equipment which is the subject of this thread is not a medical life support device, it is something along the lines of an advanced gym machine, somewhat akin to a sophisticated treadmill. There is no danger to life or limb if it stops working for any reason.