<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<br>
<div class="moz-signature">
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
Dobrý den,
<br>
<br>
V návodu k programu je toto:<br>
<p class="western">
<span lang="cs-CZ"><b>Speed Boost</b></span></p>
<p class="western"><span lang="cs-CZ"><b>This is highly
experimental!</b></span><span lang="cs-CZ"><br>
</span><span lang="cs-CZ"><b>Use
with caution and at your own risk! </b></span><span
lang="cs-CZ"><br>
</span><span lang="cs-CZ"><b>Only
use this option if you know what you are doing!</b></span><span
lang="cs-CZ"><br>
</span><span lang="cs-CZ"><b>This
option if used incorrectly can harm and destroy your motor!</b></span><span
lang="cs-CZ"><br>
</span><span lang="cs-CZ"><b>Your
motor could easily overheat if you choose too much
current!!</b></span><span lang="cs-CZ"><br>
</span><span lang="cs-CZ"><b>Speedboost
can lead to high battery consumption!</b></span></p>
<p class="western"><span lang="cs-CZ"><b>Google 'Field Weakening
Control' to get more information on this technique!</b></span></p>
<p class="western"><span lang="cs-CZ"><b>Vmin when activated</b></span><span
lang="cs-CZ"><br>
Select
the speed at which speed boost gets activated by applying </span><span
lang="cs-CZ"><b>Imin
current.</b></span></p>
<p class="western"><span lang="cs-CZ"><b>Imin - initial current
applied</b></span><span lang="cs-CZ"><br>
Initial current applied
once </span><span lang="cs-CZ"><b>Vmin</b></span><span
lang="cs-CZ">
is reached</span></p>
<p class="western"><span lang="cs-CZ"><b>Imult multiplier</b></span><span
lang="cs-CZ"><br>
Indicates
additional current used for each additional km/h</span></p>
<p class="western"><span lang="cs-CZ">Applied current = </span><span
lang="cs-CZ"><b>Imin</b></span><span lang="cs-CZ">
+ (currentSpeed- </span><span lang="cs-CZ"><b>Vmin</b></span><span
lang="cs-CZ">)*</span><span lang="cs-CZ"><b>Imult</b></span><span
lang="cs-CZ">/4096</span></p>
<p class="western"><span lang="cs-CZ"><b>Example:</b></span><span
lang="cs-CZ"><br>
Imin=7<br>
Vmin=30km/h<br>
currentSpeed=36km/h<br>
Imult=4096</span></p>
<p class="western"><span lang="cs-CZ">7+((36-30)*(4096/4096) =
7+(6*1) = 13</span></p>
<p class="western"><span lang="cs-CZ">This boost is a speed/torque
trade-off when operating over base-speed(top speed without
field
weakening). It is easy to reach crazy freewheeling speeds with
higher
currents<br>
which won't be reached under real load. Therefore
weakening the magnetic field while driving uphill will likey
just
lower your torque and reduce efficiency. Downhill or on flat
ground
the effect is most effective.<br>
Using field weakening makes only
sense in cases the max. motor torque is not needed.<br>
This is
mostly the case on </span><span lang="cs-CZ"><b>flat streets</b></span><span
lang="cs-CZ">
ot driving down a hill.</span></p>
<p class="western"><span lang="cs-CZ">If you want to experiment,
start with </span><span lang="cs-CZ"><b>Imin=2, Vmin=25km/h ,
Imult=0
(current does not increase with speed)</b></span><span
lang="cs-CZ">
and increase the values slowly. Per an value increase of 3 you
should
get about 1-2 km/h of additional speed.<br>
</span><span lang="cs-CZ"><b>Vmin</b></span><span lang="cs-CZ">
should be set </span><span lang="cs-CZ"><b>close</b></span><span
lang="cs-CZ">
to your </span><span lang="cs-CZ"><b>default top speed</b></span><span
lang="cs-CZ">
or a little lower like </span><span lang="cs-CZ"><b>5-8km/h</b></span><span
lang="cs-CZ">
(so with decreasing battery voltage you still reach this limit
for
activation) as field weakening makes only sense when driving
almost
at your usual top speed(base-speed). If default top speed is </span><span
lang="cs-CZ"><b>30km</b></span><span lang="cs-CZ">/h
set it to 25-22km/h, if default top speed is </span><span
lang="cs-CZ"><b>36km</b></span><span lang="cs-CZ">/h
set it to 31-29km/h</span></p>
<p class="western"><span lang="cs-CZ">Think of the speedboost
settings as scalars, a value that gets used to modify the
amount of
current that gets applied to overcome/reduce the back EMF that
is
limiting the max. rotation speed.<br>
Basically it scales the field
vector opposing the back EMF.<br>
This value it's not directly
translatable to amps or a specific power draw from the
battery! <br>
So
summing </span><span lang="cs-CZ"><b>Pmax</b></span><span
lang="cs-CZ">
value and the speedboost </span><span lang="cs-CZ"><b>scaling
factor</b></span><span lang="cs-CZ">
is </span><span lang="cs-CZ"><b>not</b></span><span
lang="cs-CZ">
possible.</span></p>
<p class="western"><span lang="cs-CZ">It's more like: the higher
the
value the more current will get used for field weakening. <br>
But
as increasing this value leads to increased power draw it's
intuitive
to think of it as scalar that scales the applied current used
for
field weakening the back EMF. <br>
The idea of the speedboost
settings are to be able to scale the applied field vector. </span>
</p>
<p class="western"><span lang="cs-CZ">This option is much more
effective on the </span><span lang="cs-CZ"><b>G30</b></span><span
lang="cs-CZ">
motor than on m365 motor.<br>
On G30 people with fully charged stock
battery reach up to :<br>
</span><span lang="cs-CZ"><b>36km</b></span><span lang="cs-CZ">/h
on </span><span lang="cs-CZ"><b>V6</b></span><span
lang="cs-CZ">
motor (motor serial number starts with 6) and<br>
</span><span lang="cs-CZ"><b>42km</b></span><span lang="cs-CZ">/h
on </span><span lang="cs-CZ"><b>V9</b></span><span
lang="cs-CZ">
motor (motor serial number starts with 9)<br>
on a flat street.</span></p>
<p class="western"><span lang="cs-CZ"><b>Active for</b></span><span
lang="cs-CZ"><br>
Select
the driving modes for which speed boost should be activated</span></p>
<br>
<br>
S pozdravem,<br>
<pre class="moz-signature" cols="72">--
Aleš Filip
Kutná Hora
<a class="moz-txt-link-freetext" href="http://xanadu.khnet.info">http://xanadu.khnet.info</a></pre>
<div id="quoteDIV"> </div>
</div>
<div class="moz-cite-prefix">Dne 11.08.2022 v 14:02 Jaroslav Lukeš
napsal(a):<br>
</div>
<blockquote type="cite"
cite="mid:2cf82f85-df7f-8d03-aa3a-123cb9385c9e@wo.cz">BLDC motor
se neodbuzuje, je to 3 fáz synchronní. Jedině že zkrátí nějakou
mrtvou dobu, že je vinutí napájené déle. Je to prostě spínání
cívky.
<br>
<br>
Aleš Filip napsal(a):
<br>
<blockquote type="cite">
<br>
Dobrý den,
<br>
<br>
Když už jsme u těch koloběžek. Koloběžka s 36V napájením a 350W
motorem se nerozjede na víc, než 33km/h, s klesajícím napětím
baterie tato rychlost klesá.
<br>
V programu na úpravu parametrů je volba SpeedBoost. Ta, když se
zapne, tak umí "odbuzovat motor", a tím se ještě o něco zvýší ta
maximální rychlost. Autor ale nedoporučuje to používat, že by
mohlo dojít k poškození řídící jednotky - vybouchají FETy.
<br>
Co je to odbuzení motoru?
<br>
Dá se nastavit, při jaké rychlosti to má začít odbuzovat, proud
Imin a Imult multiplier x/4096.
<br>
</blockquote>
<br>
_______________________________________________
<br>
HW-list mailing list - sponsored by <a class="moz-txt-link-abbreviated" href="http://www.HW.cz">www.HW.cz</a>
<br>
<a class="moz-txt-link-abbreviated" href="mailto:Hw-list@list.hw.cz">Hw-list@list.hw.cz</a>
<br>
<a class="moz-txt-link-freetext" href="http://list.hw.cz/mailman/listinfo/hw-list">http://list.hw.cz/mailman/listinfo/hw-list</a>
<br>
</blockquote>
<br>
</body>
</html>