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superman89
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Join Date: Aug 2009
Posts: 12

Purpose of Diode in Parallel with IGBT

10/03/2011 1:16 AM

Hi Everyone !

Can you please tell the benefit of adding a diode in parallel with IGBT in converters?
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kvsubramanyam
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Join Date: Apr 2007
Location: Hyderabad, India
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#1

Re: Purpose of Diode in parallel with IGBT

10/03/2011 1:41 AM

In bridge circuits where reverse current flow is needed an additional diode (
called a freewheeling diode) is placed in parallel with the IGBT to conduct current
in ...

I Google "diode parallel IGBT" got this, you also can google and get lot of info.

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harry potter
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#3
In reply to #1

Re: Purpose of Diode in parallel with IGBT

10/03/2011 8:20 AM

to reduce the ripples ....& inductive surges....

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electricalexpert65
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#2

Re: Purpose of Diode in parallel with IGBT

10/03/2011 6:58 AM

During re-generation, the power generated by the motor (in regeneration mode) will have to flow back to the DC Link Capacitor. The IGBT cannot conduct in reverse. SO you need a diode (reverse connected) to accomplish this.
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