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connecting powerful IGBTs in-series

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#1 Igneous


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Posted 05 September 2003 - 02:27 PM

Has anyone an experience of connecting powerful IGBTs in-series to use them @ higher voltage than rated one??? (for example 400A 1200V). There are big problems with voltage drop distribution in transient modes caused by non-simultaneous turn-on and -off times... What can u advice me?

#2 marke


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Posted 05 September 2003 - 08:42 PM

Hello Igneous

A large part of the secret is in the design of snubber circuits across each switching device that will reduce transient voltages due to differential switching times.

Best regards,

#3 vst1


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Posted 24 March 2006 - 08:17 AM

do you mean to say using 1200v igbt to control 2400v dc link? then i have seen drives in which high voltage devices used in series (4 igbt in series.)do you need more info?

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