Can I increase the frequency of 3-phase driver with arduino?

Hello,

I have a 3-phase dc motor driver. This drive has U, V and W motor outputs. I want to read these exits with arduino. Then I want to speed up the signals and send them to the stepper motor drive.

Thanks...

Please be more specific - if you talk about some hardware you have, provide full details (datasheet, part number, website, etc) rather than expect us to guess.

And goto http://xyproblem.info/ and figure out if you are asking the best question, which I suspect you are not.