Discussions

Hello,
i am building an hexacopter that should have a payload around 6kg.
i bought 6 eaglepower ea55 motors, and 2255 propellers, and i am going to buy a 6s 14000mah battery.
In this configuration, the motor draws a maximum current of 53A, and an average current of 27A, as you can see from ECALC:

The problem is that i thought to use PIXHAWK as flight controller, but in the kit that is commonly sold, the power module that feeds the flight controller with battery information, can measure 90A maximum draw.

I need a power module that can go way over this limit:
i found the attopilot 180 and other devices based on hall sensors to measure current, but they not go over 180-200A.
This is not enough , because i can have 53A*6 = 320A current draw max.

Do you know any solution to measure this high current?

I thought to buy 2 of the 180A max (hall)sensors, to divide the wire (+) coming from the battery in two almost identical wires , and to measure the current drawn fom each of these wires, ‘summing’ the results.

Do you think that this is possible?
If yes, how can i ‘sum’ the results?

The pixhawk current measure pin is driven by voltage, so i should sum the voltages measured and pass this information to the input pin.

I found these sensors, too:

https://www.mauch-electronic.com/apps/webstore/products?page=2

but again, they do not go over 200A

do you have any suggestion?

thank you!
Lodovico!