Re: [EVDL] voltage regulator idea with bad boy charger.

[Jan Steinman via EV]

> From: Lawrence Rhodes via EV 
> 
> I've used Variac's with a bridge for charging for years.  However the 
> regulators seem to be a sore point.  Why not use robust automotive voltage 
> regulators for each 12v battery.

Automotive voltage regulators do not actually regulate voltage directly.

Rather, they chop the field current of the alternator, thus reducing the output 
of the main windings.

I can't think of how you'd easily adapt these to an in-line regulation 
situation. Perhaps they could be used to chop a MOSFET connected to the Bad Boy.

 In the final analysis, more people depend on solar energy for snow removal 
than any other method. -- James Holt McGravran
 Jan Steinman, EcoReality Co-op 

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Re: [EVDL] voltage regulator idea with bad boy charger.

[EVDL Administrator via EV]

On 21 Feb 2015 at 15:33, Lawrence Rhodes via EV wrote:

> Why not use robust automotive voltage regulators for each 12v battery. 

Aren't those designed to regulate the output of an alternator by adjusting 
its field current?  That would take some effort to adapt to a charger, 
methinks.

Or maybe I don't know what I'm talking about, and automotive voltage 
regulators have changed.  

Even at that, they might expect to chat with the ECU.  If so, you'd have to 
rig a way to control them.  For example, I had a 1995 Civic VX, and even 
though its control was less complex than today's cars, the computer was 
pretty smart about SLI battery charging.  IIRC, it would tell the alternator 
and/or regulator, "Charge the battery hard when the car is decelerating.  
When we go into lean-burn high MPG cruise, don't charge it at all, unless 
you have to."

David Roden - Akron, Ohio, USA
EVDL Administrator

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[EVDL] voltage regulator idea with bad boy charger.

[Lawrence Rhodes via EV]

I've used Variac's with a bridge for charging for years.  However the 
regulators seem to be a sore point.  Why not use robust automotive voltage 
regulators for each 12v battery.  Might even be able to get away without the 
variac on some voltages.  Lawrence Rhodes
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