Author Topic: H bridge design question  (Read 1844 times)

SamM

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H bridge design question
« on: January 16, 2015, 08:53:24 am »
I'm sure this is a newbie ESC design question, and I'm certainly no EE, but on an H bridge, while going in one direction, why not set the low side FETs 'on' continuously and use the high side for PWM control?

kuriosly

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Re: H bridge design question
« Reply #1 on: January 20, 2015, 09:37:23 pm »
Short answer: You'd burn out your FETs.

Here is a good primer on how H-Bridges work:

http://www.modularcircuits.com/blog/articles/h-bridge-secrets/h-bridges-the-basics/

Here's Charles Guan's primer on H-Bridge design:

http://www.facebook.com/l.php?u=http%3A%2F%2Fetotheipiplusone.net%2Fstuff%2Fmoters2014.pptx&h=vAQEf0XTY
« Last Edit: January 20, 2015, 09:39:27 pm by kuriosly »

SamM

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Re: H bridge design question
« Reply #2 on: January 21, 2015, 06:08:28 pm »
Thanks for the response! I now realize I didn't make it clear what I meant. I meant simply keeping the one low side on, corresponding to to the high that is pulsed, which is actually what most ESCs.