CAP PACK/Capacitor pack - WattFlyer RC Electric Flight Forums - Discuss radio control eflight

Power Systems Talk about motors, ESC speed controllers, gear drives, propellers, power system simulators and all power system related topics

CAP PACK/Capacitor pack

Old 01-22-2020, 01:47 AM
  #1  
dasintex
New Member
Thread Starter
 
dasintex's Avatar
 
Join Date: Jan 2020
Posts: 13
Default CAP PACK/Capacitor pack

Twin Motor Plane 'Twin Otter', going to run 12" extensions from 4S 4500 MaH Lipo Battery in Fuselage to 60 AMP ESC's in Motor Pods/Mounts, going use Castle Creation CAP PACK next to ESC's

https://www.horizonhobby.com/CSE0110...iABEgKn2vD_BwE

Instructions for CAP PACK states for use with 8 inch extensions only, any problems stretching that out to 12 inches
dasintex is offline  
Old 01-22-2020, 12:23 PM
  #2  
ron_van_sommeren
homo ludens modelisticus
 
ron_van_sommeren's Avatar
 
Join Date: Jul 2005
Location: near Nijmegen, Nederland
Posts: 1,144
Default

Best electrical solution: battery packs in the nacelles or wings. Lowest resistance in battery and motor wires, lowest inductance in battery wires.
Second best: controllers in fuselage, near battery. Lowest battery wire inductance.

Too long wires batteryside will kill ESC over time: precautions, solutions & workarounds - RCG
Contents
  • Two problems
    ◦ Voltage spikes higher than battery voltage: transistor/FET/chip breakdown.
    ◦ Current through input capacitors too high: overheating/popping/exploding.
  • Example four costly controllers consecutively cremated
  • Solution I: simply lengthen the motor wires instead
  • Solution II: add extra capacitors, rules of thumb
    Calculation spreadsheet
  • Capacitor type and polarity/orientation!
  • How & where (not) to add extra capacitors.
    As close to or on controller.
  • DIY capacitor pack pictures
  • Capacitor & pack suppliers
  • Expert/manufacturer opinions & their rules of thumb
    They all say the same ... noise_reduction_101, switching_power_supply_design_101.
  • Cause, explanation, water hammer/knock analogy&video, theory
    References
  • Measurements & scope traces
ron_van_sommeren is offline  
Old 01-22-2020, 12:32 PM
  #3  
dasintex
New Member
Thread Starter
 
dasintex's Avatar
 
Join Date: Jan 2020
Posts: 13
Default

Appreciate the reply, I just assumed the ESC had to be next to the Motors, in my case the Battery has no choice but to be in the fuselage which means using about 12" extensions to the ESCs, extending the Motor Wires from the ESCs to the Motors a nice solution instead of the expense of Capacitor Packs
dasintex is offline  
Old 01-22-2020, 01:05 PM
  #4  
ron_van_sommeren
homo ludens modelisticus
 
ron_van_sommeren's Avatar
 
Join Date: Jul 2005
Location: near Nijmegen, Nederland
Posts: 1,144
Default

Just make sure the ESCs gets (moving) cooling air in the fuselage.

More reading, LiPo best care practices
www.rcgroups.com/forums/showthread.php?1767093-Battery-Load-Test-Comparisons/page835&perpage=10#post43327055
ron_van_sommeren is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Stevephoon
Scratch and Kit Built Aircraft
557
08-09-2019 10:30 PM
hanick
Sport Planes (Formerly I/C & Gas Conversion)
1
06-24-2014 01:25 PM
jester_s1
Power Systems
6
01-29-2013 02:41 PM
popriv
3D Flying
7
08-04-2011 06:42 AM

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 On


Quick Reply: CAP PACK/Capacitor pack


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.

Page generated in 0.08794 seconds with 15 queries