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| Ev Archive for January 1999 |
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| 1731 messages, last added Wed Aug 08 18:44:09 2001 |
[Date Index][Thread Index]
Re: More regen ?'s
A basic relationship in a series motor is the amps in the field are the same
as the amps in the armature. When doing regen, the field will need the same
amps as desired in the armature plus some additional to make up for the
wiring resistance and the internal battery resistance. The more resistance
you have, the more additional amps are necessary to produce the same regen
current.
If your vehicle accelerates at 1/2 G with 400 amps in 3rd gear, you will
need to apply somewhat over 400 amps to the series field to generate 1/2 G
of regen in 3rd gear.
Joe Smalley
joes@worldfront.com
-----Original Message-----
From: cowtown@tfz.net <cowtown@tfz.net>
To: ev@listproc.sjsu.edu <ev@listproc.sjsu.edu>
Date: Saturday, January 30, 1999 12:05 PM
Subject: More regen ?'s
>Following Lee's discussion of a regen circuit I submitted, I contemplated
>how one could eliminate the controller and still have "control": could you
>place a contactor from S1 to A2, the 400amp/400volt diode from A2 to
>traction pack negative, and use a small 6-12V (or smaller?) PWM controller
(with
>appropriate battery) to run the field?
>The pot for the field controller could be a squeeze trigger on the shift
>knob (since you'd have to do some shifting to keep the rpm's on the high
>side to get maximum effect), and powering it up could cut the power to the
contactors. If there is any way this might work, what amperage is needed for
the field? A posting a few
>months back mentioned a 12V/35amp PWM for sale on the web...would this do?
As an example, if your Prestolite 4001 is
>going 4500rpm in 3rd gear, how many amps have to go through the field to
>give a strong (say, 1/2 g?) braking effect?
>
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