H bridge designs

[R.thayer]

I am looking at using emc2 to generate pwm signal and send this to a H bridge that will drive a small pm dc motor. I would like to know your ideas and thoughts as well as if anyone has prints or designs that they are willing to share please send them my way or post them for everyone to see. Thank you for your time and hope to hear your ideas soon.

[pastera]

If you need less than 2 amps go with a L293B. Heat sink it and parallel the channels (read the datasheet).

L6202
L6205
L6206 - Dual H bridge (can parallel for more current)
L6207
L6227 - built in constant off time chopper
etc...

NJM2670D2


Aaron

[R.thayer]

I would like something that drives 8-10 amps. I am not sure that I understand what these ics are. Can someone explain them to me.

[pastera]

More info on exactly what you are tying to do is needed.
Is there any feeback involved?
What voltage?

As far as the part numbers, look up the datasheets for an explination of their use.

Aaron

[R.thayer]

I am looking at converting a small manual lathe to nc operation. The motors are pm 24 volt motors. I will install some encoders on the back side of the motors. I plan to send the encoder signals back to the pc that will be used for the control. I plan on using emc2 for the control software. The software will make the calculations for positioning. This driving signal will be pwm. So I would like to build a mosfet based H bridge or the like. Thank you

[pastera]

How much electronics knowledge do you have?
It is very easy to destroy the switches (FET or IGBJT) if you are not careful

Take a look here: http://roko.ca/articles/hbridge.php

And at IRF's application notes on motor control: http://www.irf.com/technical-info/appnotes.htm#motion

Aaron