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PCB1.4 charging current measurement #141

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greymfm opened this issue Jun 12, 2021 · 1 comment
Open

PCB1.4 charging current measurement #141

greymfm opened this issue Jun 12, 2021 · 1 comment
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@greymfm
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greymfm commented Jun 12, 2021

Hello,

The Azurit firmware might need some config adjustment (additional #ifdef for 'chgFactor') for the PCB1.4:

Nur die Formel für den Ladestrom ist betroffen, die Spannungen (Batterie/Ladespannung) sind nicht betroffen.
Die Formel zur Umrechnung lautet:

Is = Vout * 1k / (Rs * RL)
Damit ergeben sich folgende Umrechnungen (Beispiele mit Vout=1V gemesen am INA-Sensor):

PCB1.3 (external INA module)
a) bridged RL=10K: Is = 1V * 1k / (0.1 * 10K) = 1A
b) non-bridged RL=20k: Is = 1V * 1k / (0.1 * 20K) = 0.5A

PCB1.4 (INA soldered on main PCB)
a) bridged RL=6.8K: Is = 1V * 1k / (0.05 * 6.8K) = 2.941A
b) non-bridged RL=10.1k: Is = 1V * 1k / (0.05 * 10.1K) = 1.98A

(Leider arbeite ich nicht mit Azurit und kann den geschätzten "chgFactor = ADC2voltage(1)*15" nicht ausprobieren)

https://forum.ardumower.de/threads/azurit-und-das-neue-pcb-1-4.24222/post-46878

Happy mowing :-)

@netlars
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netlars commented Jun 12, 2021

Ich habe den Code angepasst, kann es leider nicht testen.

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