Acid test - Mountain Climb- 3220 motor hv160

[wojtek]

i believe there are some quiet running fans around. And with the pretty loud drive that astro is delivering [well comparing to hub motors], i am not too concerned about the extra fan noise. But with my experience of fan blowing directly on the motor, i am sure this will be VERY efficient method of cooling it.
An option would be to put a temp sensor and make the fan only start when the motor hits a certain temperature

 

[Thud]

I been eyeballing these....I'll let you be creative on applications
http://www.surpluscenter.com/item.asp?item=16-1358&catname=electric

 

[Whiplash]

Hey great find there! Under 9 watts? Your battery would not even know it was there!

 

[bigmoose]

What are you guys doing with all the burned up 3220's? :wink: I have way too many irons in the fire, but what the hey... I talked to Matt about the "power dense" motor approach that Lincoln electric used with respect to internal oil cooling.

Would be nice to get hands on a 3220 core... one that the magnets have not been taken to the curie temperature on.

 

[wojtek]

Hey great find there! Under 9 watts? Your battery would not even know it was there!

yes but you have to look also how much cooling fan gives.

I found this one, louder and taking more energy but extremely powerful and real cooling!!!
http://img.ebmpapst.com/products/datasheets/DC-axial-fan-8218JH4-ENG.pdf

20v-58v voltage range
Air flow m3/h 222

maybe too powerful

optionally: http://img.ebmpapst.com/products/datasheets/DC-axial-fan-8318H-ENG.pdf

EDIT
THEY HAVE GREAT FILTERS FOR COMPACT FANS:
http://www.ebmpapst.com/media/content/info-center/downloads_10/catalogs/compactfansen2011/compactfanssingle2011/Accessories_2011.pdf
PAGE FROM 8..
Fan filter guard grilles

Filter capacity
A fan filter guard filters out up to 75% of dust particles up to a size of 5-10 microns and withstands temperatures of up to 100°C. Flame retardant in accordance with DIN 53438, grade F1. For installed, clean filters, an air flow reduction of 20 – 30% can be assumed.