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IGBTs for mazzili driver

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LAN_403

kiat

Sat Jul 03 2010, 02:12PM

Registered Member #2115 Joined: Fri May 08 2009, 01:17PM
Location: Singapore
Posts: 46

I have just built a ZVS driver using IGBTs and I was wondering if ultra fast reverse recovery diodes for the IGBTs are needed. They are HGTG40N60B3 and I don't think they have an internal high speed reverse diode. data is here:

So, is a reverse recovery diode even required? and what should be its current rating? (UF4007, UF5408, or MUR1660)

EDIT: I powered it up and the current draw was short circuit of the transformer supply, but when i tested the igbts they are OK. perhaps its a wiring short. I also noticed that the BV (C-E) is 600v but the BV (E-C) is only 10 volts. So a reverse diode should be needed because the reverse breakdown voltage is so low

Thanks,
kiat

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