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Unread 06-02-2009, 14:04
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Mike Betts Mike Betts is offline
Electrical Engineer
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Join Date: Dec 2001
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Location: Homosassa, FL
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Re: Fisher Price Breaker Size

Quote:
Originally Posted by JVN View Post
...More important than breaker sizing is watching your loads. FP motors have a very distinct smell when they burn up (the insulation on the motor windings burns off). The first time you blow one up, you won't forget it...
John's advise is sound (as always). The FP suffers at "high loads" because it requires active cooling. Look at those vents at the rear and you will see fan impellers integrated into the motor assembly. This is why the body is so small in size compared to the power of the motor.

An FP at stall will almost immediately destroy itself regardless of the circuit breaker used (it might survive with a 20A, but I doubt it).

Bottom line, never stall a Fisher Price motor...

Regards,

Mike
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Mike Betts

Alumnus, Team 3518, Panthrobots, 2011
Alumnus, Team 177, Bobcat Robotics, 1995 - 2010
LRI, Connecticut Regional, 2007-2010
LRI, WPI Regional, 2009 - 2010
RI, South Florida Regional, 2012 - 2013

As easy as 355/113...