Xantrex versus Sunny Boy [RE-wrenches]

Bill Brooks billb at endecon.com
Thu Jul 31 09:41:22 PDT 2003


All,

Not that it really matters but IGBT stands for Insulated Gate Bipolar
Transistor. It does have an "isolated" gate "integrated" into the transistor
so everybody is correct. IGBT is a lot easier to say. All higher voltage
inverters built in the last 10 years or so are IGBT because of their overall
performance and cost. Lower voltage inverters generally use Field Effect
Transistors because of their lower cost and performance at lower voltages.

Bill.



-----Original Message-----
From: Graham Owen [mailto:graham at solarexpert.com]
Sent: Thursday, July 31, 2003 8:36 AM
To: RE-wrenches at topica.com
Subject: RE: Xantrex versus Sunny Boy [RE-wrenches]


I thought "IGBT" was an acronym for Isolated Gate Bipolar Transformer
and FET is for Field Effect Transistor?

I am also under the impression that the IGB-Transformer is much better
at handling electrical surges than FET's, which helps make Sunny Boy
inverters less susceptible to service calls and replacements. Is it true
that FET's are more efficient at low load as opposed to IGBT's which are
more efficient near rated power? Which could one reason why SB's are the
most efficient grid-tied inverters.

Graham




-----Original Message-----
From: john at gosolar.co.nz [mailto:john at gosolar.co.nz]
Sent: Wednesday, July 30, 2003 11:36 PM
To: RE-wrenches at topica.com
Subject: Re: Xantrex versus Sunny Boy [RE-wrenches]


It stands for "integrated gate bipolar transistor' - basically the
fore-runner before MOSFET technology.  Once MOSFET's hit the scene, it
pretty well took over most, if not all, applications.     And no
question is
a dumb question.

                                        cheers,                John V

------------------------------------------------------------------------
------

"Todd Cory, Mt. Shasta Energy Services" wrote:

> Maybe this is a dumb question but what is "IGBT technology"?
>
> Todd
>
> > The IGBT technology and electronics used  has very high losses at
> > less than full load.
>
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