Cutoff Switches: Two pole or combination alt and batt?

[Eric]

http://www.telusplanet.net/public/ddness/96_5.html
I haven't seen any type of cutoff switches used besides the two pole type. However, this article makes it sound like you should use a combination alternator/battery cutoff switch like this one: http://www.pegasusautoracing.com/pdfs/045.pdf
What do you think?

[Eric]

http://www.telusplanet.net/public/ddness/96_5.html
I haven't seen any type of cutoff switches used besides the two pole type. However, this article makes it sound like you should use a combination alternator/battery cutoff switch like this one: http://www.pegasusautoracing.com/pdfs/045.pdf
What do you think?

[Charlie]

Yes, we used the 4430 from Pegasus. I think the regular 2 pole is really a violation fo the rules, but they have not enforced it.

-Charlie Ping
Auburn University FSAE (http://eng.auburn.edu/organizations/SAE/AUFSAE)
5th Overall Detroit 2003
? Overall Aussie 2003. http://fsae.com/groupee_common/emoticons/icon_smile.gif

[Steve Yao]

I would concur. We realized this later when we found the engine did not cut out when we killed the master. Have to cut the alternator too.

-Steve Yao

[Eric]

Last year we wired the battery and alternator to one pole, and the positive supply to the car on the other pole. What do you think of this configuration?

[Ryan Schoffer]

that is what we are doing

then you wire the relay (for the other 2 kills)up after that, with it able to cut power to everything but its own activating circuit

just make sure you wire up the 20A fuise that bypasses the main fuse to the FI relays properly, ore remove the relays properly

Vehicle electronics leader

www.ucalgary.ca/fsae (http://www.ucalgary.ca/fsae)

[Chris Boyden]

The alternator systems that the more complex cutoff switches are designed for differ in a lot of respects compared to the sport bike alternators / regulator /rectifiers.

On the R6 that we ran last year, the alternator is 3 phase, as most bikes seem to be. It has a permanent magnet rotor and 3-phase windings for the stator. There is no exciter circuitry to disable, because of the permanent magnets.

I've been trying to talk with somebody at the rec/reg manufacturer, Shindengen america, but I haven't had any luck yet. Unfortunately, it's difficult to find a specification sheet on the rectifier regulator module.

[Eric]

I am of the same mind as you Boyden. I have also been unable to find more specs on the charging system, except that the F4i's can supply 30amps @ 5000RPM. It's good to hear someone else say what I was thinking; I was concerned for a moment.

[Ryan Schoffer]

i just cut the power from the charging circuit (battery and positive side of the rectifier) off rom the rest of the car with the main kill switch, and run everything but the activating circuit for the relay through the kill switch relay itself, with the dash and brake pedal switches controlling it

Vehicle electronics leader

www.ucalgary.ca/fsae (http://www.ucalgary.ca/fsae)