Thread: Large Fan
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Unread 08-02-2008, 08:08
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1996
Location: Wheeling, IL
Posts: 10,770
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Re: Large Fan

Many teams that build their electronics into a box use the large KOP fan to cool the box, while leaving the little fans in place on top of the Victors. There is no FIRST rule for the little fans on the Victors, however, the IFI manual for the Victor 884 specifies the fans need to be kept on the 884. FIRST recommends you follow the IFI manual.
In all of the motors supplied in the KOP, heat is generated in the armature of the motor when overloaded. (Power=current^2 x resistance) The armature only connects to the case through the end bearings and the brush assy, so cooling the case of the motor does very little to reduce the internal heat built up during a match. The FP and the Banebot motors have internal fans and cooling slots that may be helped with cooling air. However, there is no substitute to running the motor in an area of the power curve where efficiency is high and current is low. Please see the Tips and Guidelines for a discussion on motor speed choice.
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Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
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Storming the Tower since 1996.