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From: "Eric Pearson"
References: <firstname.lastname@example.org> <1F9L9.124167$Q71.email@example.com>
Subject: Re: Where do they get those MOSFETS?
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Date: Mon, 16 Dec 2002 01:09:29 GMT
NNTP-Posting-Date: Sun, 15 Dec 2002 20:09:29 EST
Sorry 225 amp unit uses 9 fets (not 19)
"Eric Pearson" wrote in message
> Hi Bob...
> 650A is a high current unit. The lower current
> 225 Amp, 48 volt units use 19 fets in parrallel.
> A 650 amp unit would use 26 fets. For low cost
> units, these are configured as a 1 quandrant
> low side chopper using the STP60NE06 fets.
> "Bob Arnold" wrote in message
> > I have designed/built H-bridge PWM motor controllers with inexpensive
> > MOSFETS ($5) and I am now trying to beef up my design to match the
> > characteristics of say a Curtis golf cart motor controller (48V @ 650A
> > cost:$574) I assume they use an H-bridge configuration using IGBTs or
> > MOSFETs, however I cannot see how they can because the components are
> > either much to expensive(IGBT) or not capable of withstanding such
> > high currents (MOSFETS);
> > - IGBT - GA600GD25S - $248 - Vce 250, Ic 1200
> > - MOSFET - IXFN200N07-ND - $35 - 70V, 200A (pulse width not obvious)
> > - MOSFET - IRFP2907-ND - $6.60 - 75V, 209A (from the datasheet, the
> > device can only withstand a 75V pulse of 200A for 100 uS)
> > Am I misunderstanding the specs of the Curtis controller? What power
> > technology do these (Curtis) controllers use?
> > Thanks
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