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Unread 09-02-2010, 22:08
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
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Re: Electromagnetic gate latch?

Dick,
I have waited to see what some teams have decided to use before I weigh in on the speed controller issue. Certainly with any current that exceeds the abilities of the Spike, you would have no choice. On your coil though, the Spike would not have a problem. The PWM nature of the Jaguar output might cause some issues with the inductance of the coil. It is possible that this interaction could produce voltage peaks in excess of the breakdown of the Power FETs in the Jaguar. did you possibly address this question with Luminary? Most designs using a coil in a DC circuit would contain a diode snubber across the coil to prevent the inductive "kick" from damaging the drive components and producing significant RF interference.
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Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
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Storming the Tower since 1996.