Fan Connection For Hobbyking X-Car 45A Brushed ESC?
07-29-2014, 11:23 PM
#1
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Fan Connection For Hobbyking X-Car 45A Brushed ESC?
I've just bought a Hobbyking X-Car 45A Brushed ESC and, if necessary, I would like to attached a 4x4cm fan to the heatsink.
Could someone tell me where is the best place to attach the wires; battery in, BEC out etc?
Cheers,
Tom.
Could someone tell me where is the best place to attach the wires; battery in, BEC out etc?
Cheers,
Tom.
07-30-2014, 05:50 AM
#2
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Taking the fan off this and get this harness, then attach one of these to the Female connectors. Then plug the wire you plugged into the Female connector into the ESC, and plug the fan into the spare Female connector. Then mount the fan onto the ESC.
07-30-2014, 06:43 AM
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I don't see why I would need a Y-harness? I don't have a use for it nor the extra extension. I have plenty of plugs (and solder) and simply want to attach it to the ESC or the receiver with as little fuss as possible.
The fan I have is a 12V fan which runs only 200rpm less when connected to a 5V supply so, and with the help from elsewhere, I will simply solder it to the outputs of the BEC or put a servo plug on it and plug it into the Auxillary of my reciever, most likely the former.
Tom.
The fan I have is a 12V fan which runs only 200rpm less when connected to a 5V supply so, and with the help from elsewhere, I will simply solder it to the outputs of the BEC or put a servo plug on it and plug it into the Auxillary of my reciever, most likely the former.
Tom.
07-30-2014, 09:21 PM
#5
Have you received the esc yet? From the pics I can see there are smaller wires that come off the board where the positive and negative battery wires connect. This looks like it's meant for powering a fan or other stuff directly from battery power. If it was me I'd hook directly to battery power and using these wires would be the easiest way of hooking up your fan. This will also allow everything the esc's internal BEC puts out to be used for powering the steering servo giving you the best servo performance possible. Powering the fan off the esc's internal Bec will only reduce servo performance however big or small the difference may be.
07-30-2014, 11:24 PM
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I've not received the ESC yet but I know that the exiting wires are as follows, from left to right; batt +, Capacitor +, Switch +, Switch -, RX Signal, RX +, RX -, Capacitor - and batt -.
Tom.
Tom.
07-31-2014, 06:25 PM
#9
fast enough that it moves a decent amount of air over the heatsink. A 12v fan run on 6v won't do it. Kinda sucks when you want to go from 2s to 3s, you have to change fans, sometimes, unless the fan is run off the BEC regulated 5 or 6V. In which case, you still need a 5V fan.
Your ESC should probably be kept under 135F at the heatsink, measured with an IR thermometer. If it's getting over 145F, the fan isn't doing it's job, or your gearing is too low.
Your ESC should probably be kept under 135F at the heatsink, measured with an IR thermometer. If it's getting over 145F, the fan isn't doing it's job, or your gearing is too low.
Last edited by EXT2Rob; 07-31-2014 at 06:47 PM.
08-01-2014, 12:25 AM
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EXT2Rob,
Thanks for the info and I will keep an eye on those temps with my IR thermometer.
I did a test using my converted PSU with the fan flat on my bench and with 12V it gave me 4550rpm and with 5V I got 4400rpm and only an added 200rpm, approx, to both results with an air gap of about 5-10mm. Now, whether this is sufficient I will have to see.
In any case a guy on another site, who has a couple of these ESCs, said that with my stock setup I may well not need the fan at all as it runs very cool. We shall see.
Tom.
Thanks for the info and I will keep an eye on those temps with my IR thermometer.
I did a test using my converted PSU with the fan flat on my bench and with 12V it gave me 4550rpm and with 5V I got 4400rpm and only an added 200rpm, approx, to both results with an air gap of about 5-10mm. Now, whether this is sufficient I will have to see.
In any case a guy on another site, who has a couple of these ESCs, said that with my stock setup I may well not need the fan at all as it runs very cool. We shall see.
Tom.
