highest voltage switcher (half or fullbridge)

Cheers

Klaus

Probably Tesla coil.

not me personally.

Your topologies refer to topologies hanging on the 'input' voltage. Is input voltage what you're after?

Output voltages will depend on downstream configuration of transformers and rectifiers, and is loosly independent.

RL

I did a flyback that made 2KV pulses about 3 ns wide. But there's probably megavolt stuff somewhere.

--

John Larkin, President Highland Technology Inc

Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators

Most of us have done better with an ignition coil - 20kV pulses several microseconds wide.

-- Bill Sloman, Nijmegen

Hi,

I was wondering about how high the voltage difference can be for the primary to secondary coil on a half or fullbridge switcher, before something fails or becomes impractical, ie coil to core insulation etc.

Could a fullbridge topology go to higher voltages and power more efficiently than a flyback, ie. for the same core from an old TV flyback, but not gapped for the fullbridge.

cheers, Jamie

:)

HVDC power transmission is something 500kV, might not really count as a switcher but it is DC that's chopped up and will eventually go to a transformer

-Lasse

Bill Sloman a écrit :

Pb is not doing long pulses. 2ns is somewhat more difficult.

Output current does not exceed 100ua at full output however.

Jamie

Micro ain't nano. There's a factor of - calculates furiously - about a thousand to one difference.

If we'll allow HVDC converters, I can say that I worked on 280 kV.

? :)

I'm well aware of that. I did a +/-7.5V pulse generator the got down to pulses 0.5nsec wide (though the amplitude was down to +/-5V down there).

The +/-60V generator doing much the same job on a different electron beam was a lot slower - about 10nsec transition times - and got very warm if you ran it above 5MHz.

The high voltage stuff depended on transformers. The ignition coil seemed to be self-resonant a bit below a MHz, and the xenon arc lamp starter transformer (also good for 20kV) - which consisted of thick, high current cable with thick insulation wound around a gapped ferrite toroid - wasn't much better.

-- Bill Sloman, Nijmegen

Those big HVDC systems are mains commutating thyristor systems.

The HVDC Lite (ABB) and HVDC Plus (Siemens) are actually switchers with voltages around +/- 100 kV DC.

We regularly work with 480VAC supplied equipment, which switches at ~700VDC, producing transients to maybe 900V peak at the worst.

Up at corporate, some guys are working with 2400V IGBTs. They don't even have anything over 480V in house without a transformer, but a few of their customers do. When you need to deliver a megawatt or so, it comes in handy to do it with just one or two modules. :)

Tim

built? :)

^^^^

So it's a typo then.

?-)