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4hv.org :: Forums :: High Voltage
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SLR overheats, feel frustrated, please help!!!

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baleworker
Tue Aug 26 2008, 01:19PM
baleworker Registered Member #1596 Joined: Fri Jul 18 2008, 08:43PM
Location: USA
Posts: 65
Electroholic wrote ...

are you only half wave rectifying the output? why does the top trace look like that?

Yrs, I do use a half way rectifier, just 1 diode(actually 20 diodes in series). Is that a problem with SLR?
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Firefox
Tue Aug 26 2008, 01:54PM
Firefox Registered Member #1389 Joined: Thu Mar 13 2008, 12:50AM
Location: Pittsburgh, PA
Posts: 346
Yes, halfwave rectification is a problem with SLR. You must use fullwave (bridge) rectification with an SLR transformer. Read the failures section of Steve's SLR inverter. The first one shows an exploded IGBT from "(foolishly) operating with a half-wave rectifier on the output of the transformer."
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Dr. Dark Current
Tue Aug 26 2008, 02:13PM
Dr. Dark Current Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
You need to load the output the same on both halfwaves, so yes if you're using any rectification it must be fullwave one (bridge rectifier/fullwave doubler).


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