Intelligent DC drives

rpoet · Jun 22, 2015

It seams everyone and their uncle makes a low cost V/Hz drive for 3ph AC motors these days. Does anybody make something comparable for 90VDC motors? Accel, decel, max and min speed, all programmed digitally instead of via trim pots. It seems that DC drives are stuck in the analog dark ages. Is it really so hard to build a DC drive with a little intelligence, or is there simply not the demand?

-rpoet

BTalbot · Jun 22, 2015

Contrex MLP-Drive

http://contrexinc.com/index.php/products-overview/ml-series/mlp-drive

jraef · Jun 22, 2015

rpoet said:
It seams everyone and their uncle makes a low cost V/Hz drive for 3ph AC motors these days. Does anybody make something comparable for 90VDC motors? Accel, decel, max and min speed, all programmed digitally instead of via trim pots. It seems that DC drives are stuck in the analog dark ages. Is it really so hard to build a DC drive with a little intelligence, or is there simply not the demand?

-rpoet

Mostly no demand, but they are out there. The problem is that the old analog SCR drives are so darned cheap and most people don't really need a lot of whoop-tee-doo features for things that still use little 90VDC motors, so there is not a lot of incentive to create a digital-for-digital-sake DC drive.

That said, Dart Controls makes a low cost digital DC drive. Bardac / Sprint and Seco (Bronco drives, now part of Danaher Motion) too.

rpoet · Jun 22, 2015

jraef said:
Mostly no demand, but they are out there. The problem is that the old analog SCR drives are so darned cheap and most people don't really need a lot of whoop-tee-doo features for things that still use little 90VDC motors, so there is not a lot of incentive to create a digital-for-digital-sake DC drive.

That said, Dart Controls makes a low cost digital DC drive. Bardac / Sprint and Seco (Bronco drives, now part of Danaher Motion) too.

I guess I hadn't realized that Dart had come into the digital world. I do agree; the things 90V motors are good for don't often need fancy control. It was mostly an academic question, since I hadn't really seen too much intelligence in the DC world.

Thanks!

-rpoet

jdbrandt · Jun 23, 2015

rpoet said:
It seams everyone and their uncle makes a low cost V/Hz drive for 3ph AC motors these days. Does anybody make something comparable for 90VDC motors? Accel, decel, max and min speed, all programmed digitally instead of via trim pots. It seems that DC drives are stuck in the analog dark ages. Is it really so hard to build a DC drive with a little intelligence, or is there simply not the demand?

-rpoet

Copley?
http://www.copleycontrols.com/index.html

Intelligent DC drives

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