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I know the purpose of the Ferite ring that the ESC-to-receiver wire is wrapped around. Does it matter where along the wire the ring is placed? For the sake of a clean installation, I would like to move it closer to the ESC side of the wire. I'm using a Turnigy Marine 120A which has the ring a little bit more than an inch from the receiver connector.
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Not sure of the correct electrical answer but on my Swordfish 120 the ring is about an inch from the esc.....Came that way and works fine....If my boats upside down then who owns the one I thought I was driving the last two laps?
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Cool thanks. I moved mine further from the rx plug, but it is kind of in the way now so I'll move it again.Comment
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Ferrite chokes are used to inhibit the transmission of radio frequency interference,(RFI), or electromagnetic interference,(EMI) along the wire used to carry a signal, or electricity.
It stands to reason, at least to this noob, the choke should be closest to the device making the transmission. In our boats that would primarily be the RX. Motor stutter, and
servo glitches have been blamed on this. Some say that using 2.4ghz solves this, still others say no. I have seen one stock ESC with a choke on both ends. My Turnigy UBEC has
two, My elogger GPS module has one, The 7 way LED lighting switch has one, heck, I'm all choked up. One would have to believe that the manufacturers have added them for a reason.
Hobby King sells them in packets of 5.Comment
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I take every one off and throw them away.Grand River Marine Modellers
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the 2.4 eliminates any of the radio "noise" that there used to be between ESC and reciever and also with brusless motors the is no arching of brushes so that motor noise is eliminated also.We call ourselves the "Q"Comment
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I assumed the torroid was there to block any "noise" from the esc, not the other way around, with a switching bec and the fets turning on and off at the pwm frequency I would have figured any "noise" would have come from there.If my boats upside down then who owns the one I thought I was driving the last two laps?Comment
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I've removed them before and not had any issues on turnigy esc's. Not even with budget HK GT2 radio. What are they made of? If they were ferrite (iron based) wouldn't they be heavier, they're pretty light, like some type of ceramic. Just wondering...NZMPBA 2013, 2016 Open Electric Champion. NZMPBA 2016 P Offshore Champion.
2016 SUHA Q Sport Hydro Hi Points Champion.
BOPMPBC Open Mono, Open Electric Champion.Comment
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They are definatly iron based, they stick to the side of a motor pretty good! Probably a ceramic iron mix of some kind.
None of the Aquacraft or Proboat escs I have (2 of each) came with them from the factory, Turnigy closer to the plug, Swordfish close to the esc, some people remove them with no issues.....No idea......If my boats upside down then who owns the one I thought I was driving the last two laps?Comment
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You are right.I assumed the torroid was there to block any "noise" from the esc, not the other way around, with a switching bec and the fets turning on and off at the pwm frequency I would have figured any "noise" would have come from there.
The choke is to inhibit noise from outside sources.
We install a lot of sensitive instrumentation for process plants, sewage & water treatment plants etc. Certain instruments come with a fer rite choke to run the profibus signal wire cores through to eliminate interference.See the danger. THEN DO IT ANYWAY!!!
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http://forums.offshoreelectrics.com/...hp?albumid=320Comment
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Agreed with above, brushless motors give very little resonance electrical noise. No need to use capicators on motors either. Some little left over technology from the days of brushed motors. For our use and equipment being used the use of chokes is not needed. But they will not inhibit any function but only help. It is basically like shielding on sensitive electrical equipment, that is why in other electronics they are still very much in use. Pretty sure your computer has one or two built into the motherboard. The radio signals aren't what is being affected it is the communicator of a brushed motor generating some unwanted pulses from on/off back feeding into the system and as your radio is connected to servos, motor, esc it sometimes would feed unwanted glitching to components, usually servo twitching and lessening receiver range.Comment
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I haven't measured it but seems to me the ESC/motor would generate quite a bit of EMI. Current flow that generates magnetic fields in the motor coils, does so in the run from ESC to motor to ESC as well. These fields induce a voltage potential in all near by conductors. Basically I think it's noisy as hell and possible to interfere with the receiver. Now 2.4 Ghz is most likely far outside the freq range generated by the ESC/motor, so interference is not seen. But I am leaving mine on and close to Rx.41" & 29" FE Aeromarine Sprint Cats, Quickdraw powered "Dollar Eater" 41" Insane Cat, 29" BL mod Graupner Cat, 24" Hydro, 29" OB Cat, BL mod NQD Tear Into Jet boat, 55" Scarab, JET SWEEP R/C pool skimmer Rescue Boat.Comment
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Good info gentlemen, and along this line, was thinking I may,(?) have to move the elogger's GPS v4 10hz module outside of the radio box, and perhaps even outside the hull for better reception.
To do this, it would be easier for me to waterproof the module if I could move the ferrite ring away from it.
I am using Spectrum marine TX & RX. The radio box contains the servo, receiver, UBEC, 3rd channel switching device, the elogger, and power panel, and *maybe* the GPS.
The hull bottom, and sides are CF, but the hatch is still FG. The RX *could* be moved outside the box if need be, and I *could* test it first,
I'm just
trying to establish a road map.Comment
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