Wrong direction do not post any patent numbers of delve further into over unity.

 

Wrong direction do not post any patent numbers of delve further into over unity.

So something that has been approved as valid by a patent examiner is a forbidden topic?

 

Forum policy, check the User Agreement

 

So something that has been approved as valid by a patent examiner is a forbidden topic?

A patent is not a stamp of approval for physical possibility in fact or theory.

https://www.nature.com/articles/438139a

The US patent office has granted a patent on a design for an antigravity device — breaking its own resolution to reject inventions that clearly defy the laws of physics.
This is not the first such patent to be granted, but it shows that patent examiners are being duped by false science, says physicist Robert Park, watchdog of junk science at the American Physical Society in Washington DC. Park tracks US patents on impossible inventions. “The patent office is in deep trouble,” he says.

One of the main theoretical arguments against antigravity is that it implies the availability of unlimited energy. “If you design an antigravity machine, you've got a perpetual-motion machine,” says Park. Shield half of a wheel from gravity and it will keep turning for ever.

 

Patents and the Patent Office are about as useless as a screen door in a submersible!

 

A Transformer is required, and the Input and Output must be fully isolated.

I disagree with both parts of that statement. The issue with an ultra-wide input voltage range buck converter circuit is that at the higher input voltages the pulse width is very narrow (the duty cycle is very low), creating both electrical problems for the control circuit and magnetic problems for the magnetics. *None* of that is insurmountable, just difficult. And none of that requires the use of a transformer.

Why must the output be fully isolated? There is nothing in the post about the input DC voltage coming from a non-isolated mains source, or that the output circuits cannot share a common GND with the input. Until the TS comments on both of those, a non-isolated buck is the best option.

I also disagree with the idea that high voltages on pc boards somehow are dangerous or unreliable. UL and other cert agencies have guidelines for voltages over 1000 V. I've run 270 V DC next to gigabit Ethernet. All it takes are planning, attention to detail, and room.

Linear Technology (now a part of Analog Devices) has power supply controllers specifically designed for high conversion ratios.

ak

 

I disagree with both parts of that statement. The issue with an ultra-wide input voltage range buck converter circuit is that at the higher input voltages the pulse width is very narrow (the duty cycle is very low), creating both electrical problems for the control circuit and magnetic problems for the magnetics. *None* of that is insurmountable, just difficult. And none of that requires the use of a transformer.

Why must the output be fully isolated? There is nothing in the post about the input DC voltage coming from a non-isolated mains source, or that the output circuits cannot share a common GND with the input. Until the TS comments on both of those, a non-isolated buck is the best option.

I also disagree with the idea that high voltages on pc boards somehow are dangerous or unreliable. UL and other cert agencies have guidelines for voltages over 1000 V. I've run 270 V DC next to gigabit Ethernet. All it takes are planning, attention to detail, and room.

Linear Technology (now a part of Analog Devices) has power supply controllers specifically designed for high conversion ratios.

ak

It is all about your actual requirements. There is a tendency to think that things electronic are always "simple and straightforward". That is true in some cases, but not all. As always "magical thinking" is a severe impediment to actual progress towards a desired result.

 

Many years ago, when I was attempting to explain someone that what he was requesting was physically and economically NOT feasible, he countered: “The problem with you, is that you don’t have sufficient faith in yourself”.

After this discussion I have called this attitude the mustard-seed-faith syndrome, from Matthew 17:20-21.

"For truly I tell you, if you have faith the size of a mustard seed, you will say to this mountain, 'Move from here to there,' and it will move; and nothing will be impossible for you.”

My advice to the TS: run, run as fast and as far possible from the person requesting you this “design”.

 

I disagree with both parts of that statement. The issue with an ultra-wide input voltage range buck converter circuit is that at the higher input voltages the pulse width is very narrow (the duty cycle is very low), creating both electrical problems for the control circuit and magnetic problems for the magnetics. *None* of that is insurmountable, just difficult. And none of that requires the use of a transformer.

Why must the output be fully isolated? There is nothing in the post about the input DC voltage coming from a non-isolated mains source, or that the output circuits cannot share a common GND with the input. Until the TS comments on both of those, a non-isolated buck is the best option.

I also disagree with the idea that high voltages on pc boards somehow are dangerous or unreliable. UL and other cert agencies have guidelines for voltages over 1000 V. I've run 270 V DC next to gigabit Ethernet. All it takes are planning, attention to detail, and room.

Linear Technology (now a part of Analog Devices) has power supply controllers specifically designed for high conversion ratios.

ak

.
I'm reasonably aware of what is "possible",
but it's a foolish idea to tell someone who is obviously not well versed in Electronics,
( especially high-Voltage DC applications ),
that it's "no problem at all" to do a ~10-to-1 step-down with ~100-Volts DC.

One tiny wire-clipping falling onto the Circuit-Board,
or a short-circuited-Component,
or a bad Solder-Joint,
could start an unstoppable Arc that could easily turn into a fire and burn-down the house.

But You were "right",
it certainly is possible to achieve such an undertaking,
but it's just a really bad idea.

The Thread-Starter is not an Electronics-Engineer with ~30-years of experience.
.
.
.

 

This thread managed to degenerate to the point it cannot stay open. Hot topic for debate, but not here.