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Unread 12-02-2007, 08:30
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
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Re: Compressor fuse keeps blowing

Doug,
This occurs due to the high starting current of the pump, up to about 25 amps. The rules state that for the pump Spike only, you may replace the 20 amp fuse with a 20 amp snap action breaker. All should be better.

Art,
Your amps vs. volts would hold true with certain types of power supply but not with the battery. What does occur as the current increases is that the terminal voltage drops. This is due to simple Ohm's Law V=I*R, for the internal resistance of the battery which is 0.011 ohms. At 100 amps this translates to 1.1 volt drop in the terminal voltage.
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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.

Last edited by Al Skierkiewicz : 12-02-2007 at 08:35.