What will it take to overheat A victor?

[Pavan Dave]

*wonders if the fans are required by FIRST rules*

[Al Skierkiewicz]

Originally Posted by Pavan

*wonders if the fans are required by FIRST rules*

Not specifically called out as such but... IFI lists the fan as an integral part of the Victor and as such, electrical parts provided in the KOP may not be modified.

[eshteyn]

Personally i have taken off the cooling fan and run 2 cim motors at 40 amps each off of the victor. The victor ran for about 15 minutes before the heat overwhelmed it.

[popo308]

Originally Posted by eshteyn

Personally i have taken off the cooling fan and run 2 cim motors at 40 amps each off of the victor. The victor ran for about 15 minutes before the heat overwhelmed it.

Were the sims stalling at all by chance??
40amps is quite a load

[Richard Wallace]

Originally Posted by popo308

Were the sims stalling at all by chance??
40amps is quite a load

40A is about 50% above the specified normal load for a CIM motor, per its data sheet. CIM motors can operate at 40A for quite a while before they will overheat -- much longer than a 2 minute FRC match. Stall current for a CIM is much higher, around 130A.

[Mike Betts]

To continue Richard's point, peak power on a CIM is at almost 70A. Most "competitive" teams will design so that the 70A point is reached several time in a match (maximum acceleration, et cetera).

[popo308]

On our 06' bot we had a basic 2 sim drive with omni wheels in the front and they went not much more than 6-8 min of constant driving before they were stalling out because of heat. In a actual match this wasn't an issue but in finals or practice they would overheat and cut out.

Are 07' bot had a 4 cim swerve drive and when we were in are low gear and were in a pushing match with another team the motors would sometimes stall out which was causing them to heat up very fast. At ARC we were very lucky that we got enough time between finals that they could cool down.