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Unread 10-07-2015, 23:27
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Mechanical Marauders - Alumnus
AKA: Paul Mangels
FRC #0271 (Mechanical Marauders)
Team Role: Mechanical
 
Join Date: Jan 2012
Rookie Year: 2011
Location: Bay Shore, NY
Posts: 403
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Re: pic: WCD Summer Project

Quote:
Originally Posted by Knufire View Post
Are you sure? From the data someone (234?) posted before last season, it seems like the voltage drop from simply accelerating from a standstill with six CIMs on a fully charged battery would result in a brownout condition. Of course this can be mitigated by setting a max dV/dt or doing more elaborate forms of current control, but you quickly run into a scenario where producing an effective six CIM system is substantially harder than buying a different COTS gearbox.
As a mechanical guy I usually just plow ahead and let the programmers figure that out

But on a more serious note at stall in low gear these motors will each draw 27-ish amps, so though that is enough to throw the breaker, I don't plan on stalling them, I plan on pushing people out of the way or breaking traction. In previous years we ran similarly geared 6CIM drives without issue unless we stalled in high gear. And I feel that the extra pushing power is always nice to have, motors can always be removed later.
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