Power Supply in Parallel?

[BWay]

I am building a router with Gecko 320's and a servo's. I have several small power supplys that supply 68v @ 5A cont. (7A max). The motors I am using will require 2.2A for continuous torque and will require 13.6A at peak torque. I am trying to decide if I should one power supply for each motor, hook up all 3 power supplies in parallel, or sell the power supplies on Ebay and pick up one larger power supply? What are the pro's/con's to hooking up multiple power supplies in parallel?

Any thoughts?

Thanks!

Brad

[Al_The_Man]

Generally it is only advisable if they all have identical characteristics, if you are going to use them, why not use one for each drive?
Al.

[BWay]

Originally Posted by Al_The_Man Generally it is only advisable if they all have identical characteristics, if you are going to use them, why not use one for each drive? Al.

The power supplies are all identical.

I originally planned one power supply for each motor. I am not worried about the continuous rating but the peak rating is of concern. Do you think I will have a problems with peak loads?

Brad

[Al_The_Man]

By rights you should not hit peak, as this is normally the demagnetization or destruction point if this is exceeded.
Short period peaks can usually be handled by linear supplies.
Drives are usually provided with current limit to avoid a high continuous peak.
Al.

[jalessi]

Brad,

Are you using any sort of torque multiplication (pulleys or gear reduction), will you be working the servo's to there peak capacity?

Jeff...

[BWay]

Originally Posted by jalessi Brad, Are you using any sort of torque multiplication (pulleys or gear reduction), will you be working the servo's to there peak capacity? Jeff...

I am using pulleys for reduction. The motors are rated for 90V. I am will be running them with 68V power supplies. From there I assumed there I assumed I would not run the motors past 80% load. This should give me about 500 ipm rapids. There is a good chance I will never run it this fast.