On 9/9 I wrote:
>>> I seem to recall that the minimum input voltage for a Zilla is 72
volts.
Might be sagging the pack to 72 volts and that is that is simply amps it
puts out at that voltage.
>>>
Seems pretty straightforward. You just have to read the posts in the thread.
All PWM controllers have _some_ lower voltage limit.
The internal logic circuitry and the gate drivers have a power supply
that has a lower threshold of operation, if nothing else.
The controller in question was indeed a Zilla. The pack was indeed 96
volts of lead-acid batteries. This leaves ~24 volts of headroom voltage
sag above the cut off.
>>>>>>>>>>>>>>>
You also mentioned that you couldn't imagine a lead-acid battery putting
out more than 900 amps.
There are many high-performance lead-acid AGM's that will easily put out
more than 1000 amps. A single 78 gram BolderTech cell will put out 1000
amps. An Optima battery has 900 _cold_ cranking amps, and will put out
far more than 1000 amps when loaded to half/voltage.
>>>>>>>>
I believe Mark Twain said:
"It is better to remain silent and be thought a fool than to speak and
remove all doubt."
Bill D.
On 9/14/2017 4:03 PM, paul dove via EV wrote:
I agree but that is not what was claimed.
Sent from my iPhone
On Sep 14, 2017, at 4:57 PM, EVDL Administrator via EV <ev@lists.evdl.org>
wrote:
On 14 Sep 2017 at 18:10, paul dove via EV wrote:
There is no voltage adjustment on input voltage in any motor controller I ever
used.
EVERY controller I've ever used has had some kind of undervoltage limit,
though in many cases it wasn't easily adjustable.
David Roden - Akron, Ohio, USA
EVDL Administrator
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