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electrical:12v:alternator_details

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electrical:12v:alternator_details [2024/03/29 19:41]
frater_secessus [dual alternators] 		electrical:12v:alternator_details [2025/02/26 11:29] (current)
frater_secessus [Heavy duty / high output]
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   * temperature monitoring so maximal current can be extracted without overheating   * temperature monitoring so maximal current can be extracted without overheating
   * RPM-based output limits   * RPM-based output limits
 +  * slowly ramping up current to avoid belt slippage/damage
 +  * shutoff when commanded by BMS
 +  * CANBUS and other communication
   * etc   * etc
  
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 [[https://www.nationsstarteralternator.com/|Nations]] and similar alternator builders make alternators for specialty uses.  [[https://www.nationsstarteralternator.com/|Nations]] and similar alternator builders make alternators for specialty uses. 
  
-Note that increasing alternator output may require upgrading stock chassis wiring: +=== big three === 
 + 
 + 
 +Note that increasing alternator output may require upgrading stock chassis wiring.  Often called "the Big Three": 
 + 
 +  - POS from alternator to starter battery 
 +  - NEG from starter battery to chassis 
 +  - NEG from chassis to engine block
  
 >> To run a [high output] alternator, ALL of your engine's factory high current cabling will need to be [sized] to support it, including engine and starting battery grounds, and alternator positive. -- MechEngrSGH((https://www.irv2.com/forums/f87/alternator-burn-out-from-lithium-batteries-558284-8.html#post6428559)) >> To run a [high output] alternator, ALL of your engine's factory high current cabling will need to be [sized] to support it, including engine and starting battery grounds, and alternator positive. -- MechEngrSGH((https://www.irv2.com/forums/f87/alternator-burn-out-from-lithium-batteries-558284-8.html#post6428559))
 +
 +In addition, the wiring from the starter batt or alternator to the house battery bank may require upsizing to actually get that current where you want it to go. 
 +
 +
 +
 ==== Idle optimized ==== ==== Idle optimized ====
  
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 Information is limited, but GM factory dual alt setups appear to run the way one would expect in the first place, with load shared between them: Information is limited, but GM factory dual alt setups appear to run the way one would expect in the first place, with load shared between them:
  
-> The two alternators are controlled over a common circuit from the ECM so they cannot be controlled independently. The ECM cannot shut one down and let the other one run. It is both or neither. +> The two alternators are controlled over a common circuit from the ECM so they cannot be controlled independently. The ECM cannot shut one down and let the other one run. It is both or neither.((https://www.duramaxforum.com/threads/dual-alternator.934098/post-11906770)) 
-((https://www.duramaxforum.com/threads/dual-alternator.934098/post-11906770))+ 
 +[[https://www.duramaxforum.com/threads/dual-alternator.934098/post-11906642|This upfitters guide excerpt]] contains additional information.
 ==== DUVAC ==== ==== DUVAC ====
  
electrical/12v/alternator_details.1711755714.txt.gz · Last modified: 2024/03/29 19:41 by frater_secessus

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