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Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Well it's a bridge rectifier rated at 400 to 1000V if I can see well from the datasheet... If it is rated at 1000V at most, do you think you can rectify 5kV with it? Answer for yourself
Registered Member #1406
Joined: Thu Mar 20 2008, 12:12PM
Location: Deepest darkest Wales, UK
Posts: 27
Sorry, I should have been more explicit. I know they won't work directly; I meant, is there any possible way of chaining them, similar to making HV single diodes from a string of smaller rated ones?
Registered Member #1406
Joined: Thu Mar 20 2008, 12:12PM
Location: Deepest darkest Wales, UK
Posts: 27
... but I really can't see a way.
Piggy-backing them would put their diodes in parallel - I *think* all that would do for each diode pair is cause all current to go through the diode with the lowest forward voltage drop, unless they're very close in value in which case it could allow higher current capabilities; but still not what I'm after.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
I don't think it's possible to stack bridge rectifiers for higher voltages. As Bjørn said you would be best by making a string of ~10 fast 1000V diodes (UF4007, BA159 etc.), (assuming you are rectifying high frequency).
Registered Member #1406
Joined: Thu Mar 20 2008, 12:12PM
Location: Deepest darkest Wales, UK
Posts: 27
Oops, ignore my previous - we were posting at the same time.
Thanks, I know that technique but am diodeless at the moment, hence the search for work-with-what-I-got alternatives. Time to go rip something diode-rich apart :D
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
In the future, you could have seriesed the bridges by using only one 'leg' of the bridge, and just ignoring the extra 3 diodes. You would loose the full wave rectifier, but you would at least be able to halfwave rectify the source (or if you are feeling adventurous add a capacitor and make a 'level shifter' voltage doubler).
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Hey - I looked at the bridge rectifier schematic again and it seems you can actually use 2 of the diodes of each bridge! Just connect them that "-" is your anode and "+" cathode.
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Rectifier query
