Re: Contoller efficience

["Todd Hunter" <hunter@progressivesystems.com>]

Marc,

I agree with you entirely.  However, all other things being equal 
the controller certainly has the ability to affect your range.

I dont remember where I read in, perhaps in Bob Brants book, but 
there were calcualtions for efficiency and loss.  I recall the 
caculations indicating that a small change in the efficiency of 
one component could have an overall recuction in loss greater than 
the individual 1% or 2% that you get from that component.

Ihave been looking for my book for a couple days.  If I can find 
it I will post the calculations.

Or someone else here may have seen it too and know where to find 
it.

Todd Hunter






---------- Original Message ----------------------------------
From: Marc Kohler <mkohler@daxcontrol.com>
Reply-To: ev@listproc.sjsu.edu
Date: Wed, 28 Feb 2001 18:18:05 -0600

>In my opinion, comparing efficiencies between mosfet controllers 
is splitting
>hairs.  Brake drag, wheels out of alignment, tires not properly 
inflated, proper
>battery care, and driver habits play a much bigger roll in range 
than any
>controller differences.
>
>Marc Kohler
>
>Todd Hunter wrote:
>
>> If I remember right the specs on the Curtis 1221 series show 
a .5 volt drop
>> at 100 amps while the 1231 shows .3 volt drop.  Looks like 2% 
is right.  Any
>> ideas on how this measures up to the DCP controllers in 
efficiency?
>>
>> I am not as concerned with acceleration as I am with range so, 
max amps
>> aren't a big issue.  Any other differences I should be aware of 
between
>> these controllers?
>
>
 

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