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4hv.org :: Forums :: Tesla Coils
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zener or TVS - IGBTs gates

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Gregory
Mon May 02 2011, 10:48PM Print
Gregory Registered Member #2922 Joined: Sun Jun 13 2010, 12:08AM
Location:
Posts: 226
Hey! Which is better? 24v zener or 24v TVS at my igbt gates ? What is differences between the zener and TVS in this kind of application?
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Arcstarter
Mon May 02 2011, 11:08PM
Arcstarter Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
Link2
Link2

Wattage is the most notable difference in characteristics.
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Wolfram
Tue May 03 2011, 05:01AM
Wolfram Registered Member #33 Joined: Sat Feb 04 2006, 01:31PM
Location: Norway
Posts: 971
TVSes have much larger capacitance, for small to medium DRSSTCs, TVSes can have more capacitance than the actual IGBT gates.
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Gregory
Tue May 03 2011, 04:24PM
Gregory Registered Member #2922 Joined: Sun Jun 13 2010, 12:08AM
Location:
Posts: 226
If the capacitance is much larger, is better use zeners
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Sulaiman
Tue May 03 2011, 09:43PM
Sulaiman Registered Member #162 Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
Or a diode in series with the TVS.

TVSs can handle very large peak power, zeners have a better voltage tolerance.

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