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Topic: Converters/pwr supplies/chargers (Read 480 times) previous topic - next topic

Converters/pwr supplies/chargers

Are the ones in our coaches switched mode or ferroresonate? I don't think they destroy themselves when their output leads are shorted together temporarily or maybe long time??

Jim
'92 Grand Villa 36' w/8.3Cummins mechanical
ORED
Build#4062

Re: Converters/pwr supplies/chargers

Reply #1 –
Bump one time. Did no good with OP...

Jim
'92 Grand Villa 36' w/8.3Cummins mechanical
ORED
Build#4062

Re: Converters/pwr supplies/chargers

Reply #2 –
Jim,

Post exactly what unit you have and exactly what "abnormal" conditions it experienced.

The alternative is to contact the company that made it and ask.

Most have upgraded from their OE "stupid" converter to a smart charger or smart inverter/charger.  That is  additionally why so few answers.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Converters/pwr supplies/chargers

Reply #3 –
Thanks, Brett. thought I commited a no no by asking that question.Trying to learn about those two types of pwr supplies...

Jim
'92 Grand Villa 36' w/8.3Cummins mechanical
ORED
Build#4062

Re: Converters/pwr supplies/chargers

Reply #4 –
Jim,

Document below may be of interest to you.  To me (a English major) it is clear as mud.  I'm going out on a limb and guess the converter/chargers originally fitted to early model Foretravel coaches used ferroresonant technology, because it was cheaper and simpler, accepts a wide range of input voltage, and provides good short circuit protection.

Power Supply Basics - Part 2: Ferroresonant and Switch Mode - MCI Transformer...

"Another unique feature of the ferroresonant transformer is its ability to provide current limiting in the event of a short-circuit. This effect is called foldback. The Ferro systems are good surge suppressors, and provide an inherent short-circuit protection and are not sensible to input overloads (like in case of lightning strikes) which are effecting the input voltage."
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Converters/pwr supplies/chargers

Reply #5 –
Thanks, Chuck. I have read that when the xfmr core is saturated, no more energy can transfer primary to secondary. Must be why they don't destroy themselves? I'm guessing the supplies can be both smps AND ferro resonant? Smps allows for much smaller xfmrs & other components...

Jim
'92 Grand Villa 36' w/8.3Cummins mechanical
ORED
Build#4062

Re: Converters/pwr supplies/chargers

Reply #6 –
Quote from: wolfe10 –
Jim,

Post exactly what unit you have and exactly what "abnormal" conditions it experienced.

The alternative is to contact the company and ask.

Most have upgraded from their OE "stupid" converter to a smart charger or smart inverter/charger.  That is  additionally why so few answers.
Jim sounds like you have replaced your old inverter charge . I did the Wizard smart charge, I burned up my inverter , not knowing what I was doing.  Who makes a nice Inverter. Only need one to power up my Dish receiver, When using my Honda, EU 2000 when i set it in the economy mode.  thanks
1992 U300 Anniversary Edition wrong color DDC6v92T Big step up from my 1983 35' fc Blue Bird .
 

Re: Converters/pwr supplies/chargers

Reply #7 –
Bestek makes a 300 watt pure sine inverter for less than$50, seen it on another topic
Old Phart Phred, EIEIO
89 GV ored 36' #3405 300 hp cat 3208 ATAAC side radiator, mountain tamer exhaust brake