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RE: (ET) charger voltage



I DIDN'T notice that this was unconnected.  I have to look at the circuit.
 
Larry Elie
 
-----Original Message-----
From: Jeff Tickner [mailto:JeffT softlanding com]
Sent: Monday, January 06, 2003 11:31 AM
To: elec-trak cosmos phy tufts edu
Subject: RE: (ET) charger voltage


So the voltage drop across the diodes is normal when not connected to the pack? I expected to see 42V and that it would drop when I connected the pack. The manual says 40V is OK but doesn't say where, before or after the diodes...

Jeff Tickner
Technical Support
800-545-9485, Ext 536
SoftLanding Systems



"Elie, Larry (L.D.)" <lelie ford com>
Sent by: owner-elec-trak cosmos phy tufts edu

01/06/2003 10:47 AM

       
        To:        "'Jeff Tickner'" <JeffT softlanding com>, elec-trak cosmos phy tufts edu
        cc:        
        Subject:        RE: (ET) charger voltage



That's not all that far off.  36V into a low pack is GOOD.  You can only source so much current (20 A for the standard charger) and you have to overcome the pack resistance.  Think about it; if you had a dead pack it would probably take 400A to bring it to 36 V instantly (and that would kill something...).  In time, you should reach 42-45V.
 
Larry Elie
 
 
 
-----Original Message-----
From:
Jeff Tickner [mailto:JeffT softlanding com]
Sent:
Monday, January 06, 2003 9:37 AM
To:
elec-trak cosmos phy tufts edu
Subject:
(ET) charger voltage


I was testing my charger to see if I had a problem with output voltage, I did it with the main disconnect out. I have recently replaced the capacitor and the diodes. I have a voltage drop across my diodes that seems unusual. I have 42V going into the diodes, but only 36V going out?


But if I let the pack charge, the charging voltage will reach 42V once the pack is charged up...


I have a diode bridge that I used instead of the stock diodes. I got it from a friend with a couple 36V EVs (Commutacar and Lectric Leopard) and he assured me it was well above specifications.


Thanks


Jeff Tickner
Technical Support
800-545-9485, Ext 536
SoftLanding Systems