APM power module inline - current limiter?

Posted by Greg Jordan on June 29, 2013 at 8:51am

Hello Everyone, Newb builder here, and just wondering;

I'm building an F550-based Hexacopter, and the motors/props I'm using are rated to draw 27A of current each at 100% thrust for 162A load max (T-motor MS2814 770kv/ APC 12x3.8).

 I calculated that at my motors max load current I would need minimum 8AWG wiring from the battery (4S 8000mAh) to the F550 built-in PDB. I notice that the APM has 13 AWG wires, and that it can read a max current of 90A.

Would using the APM inline with this setup be like putting a resister between the battery and pdb? Or worse, smoke the APM power module? If so, what other method can be used to get Voltage/Current data into the telemetry?

Thanks,

Greg

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Replies

  • Paul Feely June 29, 2013 at 10:07am
    Greg, if you are going to draw 160A I don't think you should use the power module to power the pdb. You could use https://www.sparkfun.com/products/10644 for current and voltage sensing (I've only ever used the 90a one on an APM 2 but it looks like it is supported ). The sensor is just soldered in line between you battery and pdb.

    Cheers Paul
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