Go to Post If there is anything I have learned from ChiefDelphi, it's to never underestimate the coding genius that is Brandon Martus. - Amanda Morrison [more]
Home
Go Back   Chief Delphi > Technical > Electrical
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #1   Spotlight this post!  
Unread 12-02-2005, 20:23
scitobor 617's Avatar
scitobor 617 scitobor 617 is offline
More nerd than you can handle!
AKA: Alan Meekins
FRC #0617 (HSHS 617 "DUKE")
Team Role: Programmer
 
Join Date: Nov 2003
Rookie Year: 2003
Location: Richmond, VA
Posts: 153
scitobor 617 will become famous soon enoughscitobor 617 will become famous soon enough
Send a message via AIM to scitobor 617
Could a magnetic field around CIMs cause fuses to blow?

Could a magnetic field around CIMs cause fuses to blow?

After testing our drive train for the first time we noticed some strange behavior from one of the CIMs and the Victor controlling it. We are using the gearboxes and the CIMs from the KOP.

When we started testing our motors we noticed that whenever we tried to turn a fuse would blow for one of the motors in the gearbox on the left side of our robot and the right side would begin to struggle. This happend wether the robot was on the ground not. We decided that we should isolate the problem by testing one side of the robot at a time, so we pulled out the fuses for the gearbox on the left side. When we drove the motors on right side we noticed that the cooling fan on the Victor of the motor that had been blowing fuses began to spin, and the Victor's LED came on. This seemed very odd because the cooling fan only came on when we drove the rightside motors. I noticed that the black wire for this "problem motor" was running directly under one of the motors on the rightside. I began to wonder if the magnetic field generated by the aperture of CIM could be powerful enough to induce a current in this cable. If so this would explain where the power was coming from to power the fan on the Victor. Could this also explain why this motor was blowing fuses? Jay(a team mate) and I speculate that the magnetic field around the CIMs could have caused a large amount of resistance in the problem motor's cables whenever we tried to turn. Does this explain our problem? Are we crazy?


P.S. We tried to reproduce the situation and use a multi-meter to measure the voltage produced but failed to get any definative results. I think a science teacher at my school has some sort of meter(EMF meter I think) for measuring the strength of magnetic fields so we should have some measurements by monday. Also here are some pics of our gearboxes and the wiring to them.
Picture of the wiring
Picture of the motors
__________________
Beta testers needed!
http://www.nullagent.no-ip.com

Your kidding, there are other operating systems besides Linux?!
 


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Do the CIM motors emit a magnetic field? JulieB Motors 17 27-01-2005 12:59
Vetting and Idea: Modular Field Design... Justin General Forum 19 16-06-2004 15:46
Mobile/immobile objects on field Steve782 Rumor Mill 12 08-01-2004 04:15
What happens / why do motors stall? DanL Technical Discussion 19 21-11-2002 07:19


All times are GMT -5. The time now is 18:08.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi