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Silly question from me
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joeling
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Silly question from me - 09.02.2008, 10:54 AM

Although this should belong in general electric I'd thought I'll ask it here as I ask in reference to the MMM :

How does having reverse affect the performance of an esc ? What I mean based on my feeble knowledge of electrics is if the reverse mode is used, are the number of steps for forward reduced to compensate for the reverse steps ? Is power handling affected by having reverse ? Like some FETs for forward while the rest for reverse ?

Sorry but I really don't know much.

I am running my MMM V1 in forward with brake only & quite happy with it. However, I want the convenience of reverse but do not want to sacrifice performance.

Regards,
Joe Ling


Hyper 9e Medusa 4S, Savage 5S MMM 8XL, Jammin' 4S Neu MMM, X2 Ninja JX, X2 MMM 5S Neu, E REVO Medusa 6S
   
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BrianG
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09.02.2008, 11:01 AM

AFAIK, there is no added compensation for reverse. It's just a bunch of FETs hooked to the + rail and - rails, and the brains tells which FETs to turn on at any given time. Direction is determined by the order in which they are turned on.

Also, there are no "reverse" FETs. Each phase has FETs that lead to the + rail, and an equal number leading to the - rail (ground). Since there are 3 phases and 2 banks of FETs per phase, the total FET count is a multiple of 6.

Look up "H bridge" online, or preferably "3 phase H bridge" to get an idea on how the ESC works.
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joeling
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09.02.2008, 11:07 AM

This is good info thanks. Looks like I can run the esc in reverse mode to get myself out of spots that no nitro buggy or truggy can get out of

Regards,
Joe Ling


Hyper 9e Medusa 4S, Savage 5S MMM 8XL, Jammin' 4S Neu MMM, X2 Ninja JX, X2 MMM 5S Neu, E REVO Medusa 6S
   
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Happywing
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09.02.2008, 12:40 PM

I've always used reverse with my conversions. Both with the MM and the MMM. Both with no more problems than anyone else. In fact, I've had better luck with ESC's than most. It is a nice feature and it does freak out the nitro guys.
   
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big greg
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09.02.2008, 04:19 PM

yup chris, you gotta be in the white night club tho! lol
   
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