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High Current H-Bridge
Moderators: adafruit_support_bill, adafruit

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High Current H-Bridge

by dze on Fri Sep 03, 2010 10:19 am

Hi,

so after my post on powersupply, i think the only way around for driving my motors 7.5v 12a is to build my own high current h-bridge. I've been look around, and have found some diy schematics, but they don't seem to meet my needs of 12amp.

Can someone show me the direction of where i could look for FETs that handle up to 12 amp of current? Have anyone build this before? I would need pwm on speed but i don't need direction changing, but i guess it comes anyway along using the h-bridge.

any help greatly appreciated.

cheers

dze
 
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Re: High Current H-Bridge

by adafruit_support_bill on Fri Sep 03, 2010 10:34 am

There are plenty of off-the-shelf H-bridges for the RC-racing and robotics market. Here's one source: http://www.lynxmotion.com/c-10-motor-controllers.aspx

adafruit_support_bill
 
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Re: High Current H-Bridge

by Entropy on Fri Sep 03, 2010 12:44 pm

Might want to read the blogs of Charles Guan (etotheipiplusone.net) and Shane Colton (scolton.blogspot.com) - Shane has developed an Arduino hexbridge shield.

In general, you probably want to look for a FET driver IC like the one they use on the hexbridge along with some FETs. You could possibly send their hexbridge design out to a board house.
Entropy
 
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Please be positive and constructive with your questions and comments.