EBM EC motor control

[WPStrassburg]

Does anyone know what I could use for speed control for one of these EC motors? I don't think the cheap digital pwm speed controls are appropriate for an EC motor, but do t know what else to look for. All the EC motors I've dealt with had a speed input separate from the power. Will 12-28v power input cause a speed change or is that just the acceptable voltage input?
View attachment ImageUploadedByHome Brew1438700126.152913.jpg

 

[WPStrassburg]

http://www.ebmpapst.us/media/content/products/downloads/Motors_VD-VDC_EN.pdf

 

[IslandLizard]

From what it looks, the DC voltage applied controls the speed. The PWM controller is built inside EC motors.

 

[estricklin]

I certainly don't know the answer, as you I pretty much thought all these types of motors had a separate control for speed. Maybe this one has some built in electronics, and as you state one simply supplies voltage in the given range to control the speed?

What do you plan to use this motor for, I'm just curious. Hopefully someone smarter than me will come along.

 

[WPStrassburg]

I've come across a pump coupled to one of these and was thinking about picking it up to try out, but wasn't going to bother if I could do some sort of simple speed control. Just thinking that with the speed control I could get a more accurate and repeatable process during something like lauter draw-off and sparging.

 

[WPStrassburg]

23-28V input changes the motor speed a good bit but does not change the flow tremendously. March indicates that it will go down to 20v, but much below that will start having issues running consistently which is understandable in a pump application.

With the motor so small on these I see the smallest toolbox RIMS tube ever in the making!

The noise in the video is way worse than it actually is.





http://vid9.photobucket.com/albums/a76/w_strassburg/Beer/E63085EE-14F7-4268-8FA6-AE64487559F3.mp4



http://www.marchpump.com/809-brushless/

 

[biertourist]

Um... More information on this pump, please! And the poly camlocks...

This is a March??

 

[WPStrassburg]

Yup, it's a 24v brushless March pump! Same wetend as the 809HS' just with a 24vDC motor. I was hoping the flow change was greater than it is with the voltage input change, but like any other pump a valve on the output will serve for flow control. They have the highest head of the 809 pumps and second highest flow, so they are a sweet little package. As you can see with 1/2" tubing they whirlpool pretty nicely.

http://www.marchpump.com/809-brushless/

The polypropelene camlocks are from Proflow Dynamics. The nice things about the poly ones are you can get 1/2" and 3/4" threads with the came size cam connections. The cams are all 3/4" size, but you can get mpt, fpt, and barbs on the other end in either 1/2" or 3/4" sizes, which saves adapters and some pressure drop.

http://store.proflowdynamics.com/modules/store/-Polypropylene_C67.cfm

 

[augiedoggy]

The only one one these I was able to find on amazon was the 12v version for $238 which is not very practical as far as I can see for a 7gpm plastic pump.
Were you able to source one for a reasonable price ? Is there some other advantage to these over a standard pump? I can only assume your building a fully automated system and want to precisely control a fill level without a float sensor?

I have boxes of littte dc stepper motors that look like the one this pump uses...Ironically many came from xerox located where your from.

http://www.amazon.com/dp/B00CUHAOIE/?tag=skimlinks_replacement-20

The food grade PPS 24v pumps Ive been using the last couple years are only 3 gallons per minute but also only $18 with shipping... a standard pwm controller gives them a fairly broad speed control range.