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Re: DRSSTC Primary Circuit Feedback Control



Original poster: "Antonio Carlos M. de Queiroz" <acmdq@xxxxxxxxxx>

Tesla list wrote:
>
> Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>

> Yep.  They dual coupled LC system normally wants to have that dual
> frequency thing.  But with secondary feedback, the IGBTs have to "force"
> the system, which increases power dissipation on them.  The dual frequency
> should not hurt anything and should take a lot of stress of the IGBTs...

There are three frequencies. The two of the LC system and the one of the
driver. There are three situations where the switching is naturally
soft: Drive at one of the resonances (that produces increasing input
current and slow ringup), and drive exactly between the resonances,
that procuces the fastest possible ringup, with proper dimensioning.
See:
http://www.coe.ufrj.br/~acmq/tesla/drsstc.html

Antonio Carlos M. de Queiroz