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Re: Terry's DRSSTC -"different" H-drive functions...
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- Subject: Re: Terry's DRSSTC -"different" H-drive functions...
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Wed, 12 Jan 2005 23:29:48 -0700
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- Resent-date: Wed, 12 Jan 2005 23:30:44 -0700 (MST)
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Original poster: "Antonio Carlos M. de Queiroz" <acmdq@xxxxxxxxxx>
Tesla list wrote:
>
> Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
> "Normally", when the gate drives are off, the IGBTs are pretty much
> slamming on the breaks for the primary loop current. If all the IGBTs are
> not conducting, then the primary Q is very low and the energy stored in the
> primary is very quickly being dissipated in the free-wheeling diodes in the
> IGBTs.
Maybe I am thinking in a different circuit, but if the IGBTs are off,
in a full bridge, the reverse diodes don't conduct,
unless for some reason the voltage across the primary circuit (L+C)
becomes higher than the DC power supply that feeds the bridge.
Antonio Carlos M. de Queiroz