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From: "Eric Pearson"
Subject: Re: Where do they get those MOSFETS?
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Date: Mon, 16 Dec 2002 01:05:01 GMT
NNTP-Posting-Date: Sun, 15 Dec 2002 20:05:01 EST
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?
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