Wiring an outrunner for test

Anything to do with Propulsion.
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rehoward
Posts: 49
Joined: Dec 15th, 2015, 5:41 am
Location: Everett, WA

Wiring an outrunner for test

Post by rehoward »

Getting ready to do some thrust/amp tests on an outrunner motor that I bought recently. Both motor and ESC were bought from HobbyKing and are matched for their specs. I was wondering if it is important to locate the ESC close to the motor or does that matter so much? Can I put the ESC maybe 4 feet away from the motor or is that a bad idea?

Randy
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olegodo
Posts: 222
Joined: Aug 30th, 2013, 9:47 am
Location: Bergen, Norway

Re: Wiring an outrunner for test

Post by olegodo »

There will be a small voltage drop as the wire length increases. This can be reduced by increasing wire cross section of the wire.
Also there could be a potential sync issue. The ESC does its timings according to pulses coming back up the wire from the motor as it turns (if I'm not totally mistaking).
I have run my thrusters with about 6ft of wire between the ESC and motor without issue though. Your mileage may vary.
Keep it as short as possible to avoid issues I guess? :)
Jaman42
Posts: 94
Joined: Nov 3rd, 2014, 4:19 am

Re: Wiring an outrunner for test

Post by Jaman42 »

I use this tool to calculate my wire thickness http://www.solar-wind.co.uk/cable-sizing-DC-cables.html
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