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From: Paul Burridge
Subject: Re: Where do they get those MOSFETS?
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Date: Mon, 16 Dec 2002 12:54:52 +0000
NNTP-Posting-Date: Mon, 16 Dec 2002 14:23:07 GMT
Organization: Virgin Net Usenet Service
On 14 Dec 2002 16:49:36 -0800, email@example.com (Bob Arnold) opined
>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);
I think you're underestimating the capabilities of the MOSFET. The
BUZ100 (to take just one example) can handle 250W and doesn't even
cost five lousy bucks. All you have to do is parallel a few of 'em up
to get the current handling you need.
"What is now proved was once only imagin'd"
- William Blake, 1793
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