Forums

highest voltage switcher (half or fullbridge)

Started by Jamie M February 22, 2012
Bill Sloman a �crit :
> On Feb 22, 3:33 pm, John Larkin > <jjlar...@highNOTlandTHIStechnologyPART.com> wrote: >> On Tue, 21 Feb 2012 23:41:39 -0800, Jamie M <jmor...@shaw.ca> wrote: >>> Hi, >>> Just curious what the highest voltage switcher people here have built? :) >>> cheers, >>> Jamie >> I did a flyback that made 2KV pulses about 3 ns wide. But there's >> probably megavolt stuff somewhere. > > Most of us have done better with an ignition coil - 20kV pulses > several microseconds wide. >
Pb is not doing long pulses. 2ns is somewhat more difficult. -- Thanks, Fred.
Jamie M wrote:

> Hi, > > Just curious what the highest voltage switcher people here have built? :) > > cheers, > Jamie
60KVDC output for special case in HI-POT testing. Watches the primary side in the off duty for return energy to determine what is happening on the secondary side as it is ramping up. Output current does not exceed 100ua at full output however. Jamie
On Wed, 22 Feb 2012 08:33:13 -0800 (PST), Bill Sloman
<bill.sloman@ieee.org> wrote:

>On Feb 22, 3:33&#2013266080;pm, John Larkin ><jjlar...@highNOTlandTHIStechnologyPART.com> wrote: >> On Tue, 21 Feb 2012 23:41:39 -0800, Jamie M <jmor...@shaw.ca> wrote: >> >Hi, >> >> >Just curious what the highest voltage switcher people here have built? :) >> >> >cheers, >> >Jamie >> >> I did a flyback that made 2KV pulses about 3 ns wide. But there's >> probably megavolt stuff somewhere. > >Most of us have done better with an ignition coil - 20kV pulses >several microseconds wide.
Micro ain't nano. There's a factor of - calculates furiously - about a thousand to one difference. -- John Larkin, President Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation
"langwadt@fonz.dk" <langwadt@fonz.dk> wrote:
> On 22 Feb., 22:08, Jamie M <jmor...@shaw.ca> wrote: >> On 22/02/2012 5:57 AM, legg wrote: >> >>> On Tue, 21 Feb 2012 23:41:39 -0800, Jamie M<jmor...@shaw.ca> wrote: >> >>>> Hi, >> >>>> Just curious what the highest voltage switcher people here have built? :) >> >>>> cheers, >>>> Jamie >> >>> Your topologies refer to topologies hanging on the 'input' voltage. Is >>> input voltage what you're after? >> >> 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. >> > > 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
If we'll allow HVDC converters, I can say that I worked on 280 kV.
On Feb 23, 1:30=A0am, John Larkin <jlar...@highlandtechnology.com>
wrote:
> On Wed, 22 Feb 2012 08:33:13 -0800 (PST), Bill Sloman > > > > > > > > > > <bill.slo...@ieee.org> wrote: > >On Feb 22, 3:33=A0pm, John Larkin > ><jjlar...@highNOTlandTHIStechnologyPART.com> wrote: > >> On Tue, 21 Feb 2012 23:41:39 -0800, Jamie M <jmor...@shaw.ca> wrote: > >> >Hi, > > >> >Just curious what the highest voltage switcher people here have built=
? :)
> > >> >cheers, > >> >Jamie > > >> I did a flyback that made 2KV pulses about 3 ns wide. But there's > >> probably megavolt stuff somewhere. > > >Most of us have done better with an ignition coil - 20kV pulses > >several microseconds wide. > > Micro ain't nano. There's a factor of - calculates furiously - about a > thousand to one difference.
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
On Wed, 22 Feb 2012 13:20:50 -0800 (PST), "langwadt@fonz.dk"
<langwadt@fonz.dk> wrote:


>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
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

-- 
Deep Friar: a very philosophical monk.
Website: http://webpages.charter.net/dawill/tmoranwms

"Jamie M" <jmorken@shaw.ca> wrote in message 
news:ji267q$bg5$1@speranza.aioe.org...
> Hi, > > Just curious what the highest voltage switcher people here have built? :) > > cheers, > Jamie
On Wed, 22 Feb 2012 16:30:08 -0800, John Larkin
<jlarkin@highlandtechnology.com> wrote:

>On Wed, 22 Feb 2012 08:33:13 -0800 (PST), Bill Sloman ><bill.sloman@ieee.org> wrote: > >>On Feb 22, 3:33=A0pm, John Larkin >><jjlar...@highNOTlandTHIStechnologyPART.com> wrote: >>> On Tue, 21 Feb 2012 23:41:39 -0800, Jamie M <jmor...@shaw.ca> wrote: >>> >Hi, >>> >>> >Just curious what the highest voltage switcher people here have =
built? :)
>>> >>> >cheers, >>> >Jamie >>> >>> I did a flyback that made 2KV pulses about 3 ns wide. But there's
^^^^
>>> probably megavolt stuff somewhere. >> >>Most of us have done better with an ignition coil - 20kV pulses >>several microseconds wide. > >Micro ain't nano. There's a factor of - calculates furiously - about a >thousand to one difference.
So it's a typo then. ?-)