R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 12-14-2005, 07:59 PM   #46
Tech Master
 
XrayFK's Avatar
 
Join Date: Oct 2005
Location: San Diego, CA
Posts: 1,463
Trader Rating: 1 (100%+)
Default

A peltier needs 12-14V DC
XrayFK is offline   Reply With Quote
Old 12-14-2005, 08:10 PM   #47
Tech Regular
 
Join Date: Sep 2005
Location: Au
Posts: 329
Default

Quote:
Originally Posted by XrayFK
A peltier needs 12-14V DC
yeah i know... it worked the first time when i connected it to a 12v for about 10seconds... just to test it, it got very hot... i didnt have any heatsink on it... then i tried putting it on a 5.5 source, nothing happen, then i tried putting back on my 12v and it now doesnt work

wondering if putting on the 5.5v ruined it... or wheter i had it on whilst not having any heat sink ruined it....
qwerty is offline   Reply With Quote
Old 12-14-2005, 08:38 PM   #48
Tech Master
 
XrayFK's Avatar
 
Join Date: Oct 2005
Location: San Diego, CA
Posts: 1,463
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by qwerty
yeah i know... it worked the first time when i connected it to a 12v for about 10seconds... just to test it, it got very hot... i didnt have any heatsink on it... then i tried putting it on a 5.5 source, nothing happen, then i tried putting back on my 12v and it now doesnt work

wondering if putting on the 5.5v ruined it... or wheter i had it on whilst not having any heat sink ruined it....
Applying a lower voltage would not harm it any way. However, peltiers are very fragile, and you could have overheated and fried it when you plugged it in without any way to keep the hot side cooler.
XrayFK is offline   Reply With Quote
Old 12-15-2005, 12:04 AM   #49
Tech Regular
 
Join Date: Sep 2005
Location: Au
Posts: 329
Default

i got another peltier module

here is my peltier setup.... i cant seem to be able to get the cold side cooler than 55deg F.

if i add heat sink/copper plate to the cold side will it make it colder?

also on the colde side it is nt consistant cold. there are areas on the cold side that are 80degF and the coldest part is 55degF...

Last edited by qwerty; 12-17-2005 at 12:00 AM.
qwerty is offline   Reply With Quote
Old 12-15-2005, 01:29 AM   #50
zax
Tech Regular
 
zax's Avatar
 
Join Date: Apr 2005
Location: SINGAPORE
Posts: 283
Default

so the air is blow into the heatsink or suck from the heatsink..?
zax is offline   Reply With Quote
Old 12-15-2005, 02:19 AM   #51
Tech Addict
 
Join Date: Feb 2004
Location: Iceland
Posts: 588
Default

Blow into the heatsink. That way the fan is working in cooler air and lasts longer. Not that it matters much in this application. Also, you should always mount the fan so that it blows the hot air upwards. It's more efficient. Hot air rises and if you try to blow it down you're fighting nature and wasting energy. Or should that be wasting energy fighting nature.
andsetinn is offline   Reply With Quote
Old 12-15-2005, 03:28 AM   #52
zax
Tech Regular
 
zax's Avatar
 
Join Date: Apr 2005
Location: SINGAPORE
Posts: 283
Default

Quote:
Originally Posted by andsetinn
Blow into the heatsink. That way the fan is working in cooler air and lasts longer. Not that it matters much in this application. Also, you should always mount the fan so that it blows the hot air upwards. It's more efficient. Hot air rises and if you try to blow it down you're fighting nature and wasting energy. Or should that be wasting energy fighting nature.
fan--------> fan is blow into the heatsink, so is blow down..\/ u sae hot air
\/ \/ ----- >rises..but the air is blow down how can the hot air rise?
heatsink->
motor---->
zax is offline   Reply With Quote
Old 12-15-2005, 03:46 AM   #53
Tech Regular
 
Join Date: Sep 2005
Location: Au
Posts: 329
Default

These are my results....

Ambient Temp 79F
Hot side Heat Sink 83F
Cool Side of Peltier 55F

Drop in temperature = 24F


Are those results as expected? Anyway to make my Peltier more efficient?

Last edited by qwerty; 12-17-2005 at 12:01 AM.
qwerty is offline   Reply With Quote
Old 12-15-2005, 03:47 AM   #54
Tech Initiate
 
180sx's Avatar
 
Join Date: Jul 2005
Posts: 33
Default

here my motor cooling device, works a treat
Attached Thumbnails
Designing my own Motor Cooler-freezer.jpg  
180sx is offline   Reply With Quote
Old 12-15-2005, 04:13 AM   #55
Tech Elite
 
Jack2's Avatar
 
Join Date: Nov 2004
Location: Australia
Posts: 2,377
Trader Rating: 1 (100%+)
Default

180sx, yes looks nice and cold.........but I have a bit of a feeling that might be a tight fit in my pit box....
__________________
Schumacher Mi4CX
Mugen MTX & MRX

"He who dies with the most toys wins" - Phil Harris
Jack2 is offline   Reply With Quote
Old 12-16-2005, 02:08 PM   #56
Tech Champion
 
Slotmachine's Avatar
 
Join Date: May 2003
Location: Germantown Maryland
Posts: 5,697
Trader Rating: 4 (100%+)
Send a message via MSN to Slotmachine
Default

I`m going to try 1 OF THESE hooked up to me power supply 14v. I am going to get a piece of copper pipe the same diamiter of the motor and cut a section out so I can snap it onto yhe motor, I also piched up a copper fined heatsink for the cold side.
__________________
HOBBYWING NORTH AMERICA /FALCON SEKIDO/ TEKNO RC TEAM/VBC Racing America/VP-PRO RACING TIRES/2010 R.O.A.R. VTA National Champion Driving a T2R PRO/NANO-TECH Batteries Paul Rush
Slotmachine is offline   Reply With Quote
Old 12-16-2005, 02:54 PM   #57
Tech Master
 
XrayFK's Avatar
 
Join Date: Oct 2005
Location: San Diego, CA
Posts: 1,463
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by Slotmachine
I`m going to try 1 OF THESE hooked up to me power supply 14v. I am going to get a piece of copper pipe the same diamiter of the motor and cut a section out so I can snap it onto yhe motor, I also piched up a copper fined heatsink for the cold side.
That peltier won't be anywhere strong enough to cool a motor. In general I would stay away from the TECs that are sold in ebay.
XrayFK is offline   Reply With Quote
Old 12-16-2005, 09:36 PM   #58
Tech Initiate
 
Join Date: Dec 2002
Posts: 43
Default

qwerty,
I have one of these motor coolers that works very well. It has a thick piece of copper between the peltier and the motor clamp. Also are you using a thermally conductive product such as arctic silver between the peltier the heatsink surface? I think this will help transfer heat/cold better.
toomanytoys is offline   Reply With Quote
Old 12-16-2005, 09:51 PM   #59
Tech Fanatic
 
anthony390's Avatar
 
Join Date: Apr 2005
Location: the race line to pros
Posts: 849
Send a message via AIM to anthony390
Default

Quote:
Originally Posted by fathead
My first cooler would get down to about 9-10deg C on the motor
It will get condensation on the motor clamp





Now I have a heatsink twice as big on it with a 60mm fan and that gets icy.
All up cost me about NZ$60.

do you run that while racing
anthony390 is offline   Reply With Quote
Old 12-17-2005, 12:02 AM   #60
Tech Regular
 
Join Date: Sep 2005
Location: Au
Posts: 329
Default

Quote:
Originally Posted by toomanytoys
qwerty,
I have one of these motor coolers that works very well. It has a thick piece of copper between the peltier and the motor clamp. Also are you using a thermally conductive product such as arctic silver between the peltier the heatsink surface? I think this will help transfer heat/cold better.

i just used super glue.

is this artic silver a glue?
qwerty is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
*** Crazy Motor Freezer ( Motor Cooler ) *** CrazyRonny R/C Items: For Sale/Trade 145 01-26-2008 07:31 PM
MuchMore Motor Cooler + Orion Motor Performance Monitor mugengreg Australia For Sale/Trade 11 01-05-2008 09:56 PM
MUCH MORE MOTOR COOLER woozer71 Australia For Sale/Trade 0 12-06-2006 04:56 PM
Much More CTX Motor Cooler Desolas R/C Items: For Sale/Trade 3 12-05-2006 07:57 AM
Much More Motor Cooler WhoMe R/C Items: For Sale/Trade 16 06-26-2006 02:53 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 05:18 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net