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Re: DRSSTC question
- To: tesla@xxxxxxxxxx
- Subject: Re: DRSSTC question
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Fri, 23 Sep 2005 20:16:34 -0600
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- Delivered-to: tesla@pupman.com
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- Resent-date: Fri, 23 Sep 2005 20:18:47 -0600 (MDT)
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Original poster: Steve Ward <steve.ward@xxxxxxxxx>
The internal diodes on any IGBT seem to be just as fast (if not
faster) than the IGBT itself. IGBTs are being made with what seem to
be very good diodes built in. People used to disable the internal
diode on MOSFETs, but i find that this is unnecessary as well, and
that usually the internal diodes are good enough.
Steve
On 9/23/05, Tesla list <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx> wrote:
Original poster: <mailto:FIFTYGUY@xxxxxxx>FIFTYGUY@xxxxxxx
In a message dated 9/23/05 3:16:34 PM Eastern Daylight Time,
<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx writes:
>Yes, the reverse diode is *absolutely* required for a DRSSTC. You
>need an ultrafast recovery diode, and typically one rated similarly
>to the IGBTs being used.
For a while, wasn't the consensus that external diodes were a
requirement? To not trust merely the internal diodes alone? Or is
this not an issue with the IGBT's used now?
-Phil LaBudde