RC-Monster Forums  

Go Back   RC-Monster Forums > Support Forums > Castle Creations

Reply
 
Thread Tools Rate Thread Display Modes
Old
  (#1)
snellemin
2 KiloWatt RACER
 
snellemin's Avatar
 
Offline
Posts: 2,496
Join Date: May 2007
Location: Houston
10.06.2009, 10:32 PM

Ah, now I remember.


6 KiloWatt A123 Racer
GTP-Pletty Big Maxximum+RX8. GTP-C50-6L Hacker+RX8. CRT.5-Pro4+ZTW esc.
24s2p EVG SX 49.6mph Ebike.
18s4p Raptor 60mph Ebike. 11.5KW
   
Reply With Quote
Old
  (#2)
lutach
RC-Monster Dual Brushless
 
lutach's Avatar
 
Offline
Posts: 5,139
Join Date: Sep 2006
10.07.2009, 09:53 AM

"In both cases, it is therefore enough to intensively brake only once and the controller can be easily and quickly damaged,
basically after few meters‘ ride.


The paradox is that the better controller you use (the more quality FETs and PCBs, or the more FETs and thicker copper layers it
has on pcbs, that is smaller resistances of FETs and connections it has), the worse the situation. The motor, working as a generator
during braking, causes more energy (current) to flow to the battery. Thus higher voltages are caught on the resistances of the
conductors (Rconductor) and inner resistance of the battery (Rbattery) and therefore higher voltage will also be on the input of the
controller (UCONTROLLER). That means, the destruction of the controller is more likely to occur when there is not enough reserve in its
voltage dimensioning."

Patrick,

I would like your input on what Mr. Grisa mentioned in the PDF file provided by lydiasdad. You have mentioned that you use a lot of copper on your ESCs which I think is good, but Mr. Grisa thinks otherwise form what I gathered.
  Send a message via MSN to lutach  
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump







Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
vBulletin Skin developed by: vBStyles.com