Throttle up but magfield down

ArduPlane
1

Hi

As shown below picture, whenever throttle up, the magfield goes down.

Is there anybody who can explain this situation?

P.S : I attached low ESR capacitor to power module.

thrUp_magDown
thrUp_magDown.png1550Ă—923 22.5 KB

2

Is this during a flight or were you holding it on the ground/bench?

3

I should have put altitude data ^^;
She was flying !~

4

Then this is really weird! I don’t think I can explain it…

If it was standing still, then the vector sum of the Earth magnetic field + the motor’s magnetic field could very well cancel out.
But if this was during an interval with changing direction…

Perhaps you are in an area with a very large inclination of the magnetic field?

5

this is not unusual at all. The magnetic field is a 3D vector. Let’s assume you are in the northern hemisphere. You will have a strong positive Z component to the field. If the current from the power system adds a negative Z component (due to wires below the compass), then the length of the total field will drop.
Try plotting the individual components, not the total field length.
Cheers, Tridge

1 Like
6

Thanks Tridge,

But this is my first experience. Why never ever before but this time even with same plane? ^^;