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The Brushless thread
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Rotwang
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Joined: 15 Jun 2004
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Location: Vic


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It’s the brushless motors coping with the heat that worries me.

We have never had a problem with either type of connector and we’ve smoked fans and scooters using these connectors without the plastic showing any sign of melting.

Were not intending to load things up or running them as hard as Glen or Andrew. Smile


http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=9131&Product_Name=TURNIGY_Heat_Sink_with_Fan_for_36_series_motors.



Might get one of these, I can feel the heat after a very short test run no load.
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Post Sun Sep 06, 2009 8:45 pm 
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andrew



Joined: 16 Jun 2004
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Location: Castle Hill, Sydney. N.S.W


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looking slick mr stott

in orbit i always geared em nicely to where the motors themselves ran very well, only things that have killed em for me in past have been either weopon blade mounting bending causing disc to hit pulley and killing the motor or in the case of orbit v bender last jan a bad connection on one of the motor wires

best of luck with it and hope to see you in the arena at battleshed if not robowars next jan
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Post Sun Sep 06, 2009 9:37 pm 
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Rotwang
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Thanks Andrew, yes, didn’t realize why your motor played up in the bender fight.

Have to watch the video again.

Lost a phase hmm. Something else to be careful of.

What went wrong, one of the bullet connectors popping apart?
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Post Thu Sep 10, 2009 8:51 pm 
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andrew



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yeah the join from wire to bullet connector failed horribly
when i found it out and resoldered it worked perfect again
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Post Thu Sep 10, 2009 9:53 pm 
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timmeh
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I hate connectors i solder everything together but the battery plug.
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Post Thu Sep 10, 2009 9:57 pm 
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Glen
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i think he means the solder in the bullet connector broke off ;p

the ones that come with the scorpion are wicked though. there such a crazy tight fit and there so easy to solder. kinda pointless to use polarised connectors on a brushless motor anyway haha. especially if you might have to replace it.

so much easier to use the bullet connectors make sure there the collet style with the little rubber ring at the bottom though. dont use the garbage solid metal types that hobby city supplies.
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Post Thu Sep 10, 2009 10:00 pm 
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timmeh
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Yer i know but id rather solder wire to wire.
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Post Thu Sep 10, 2009 10:05 pm 
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Rotwang
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So it didn’t burn the motor out, that’s good, thought sitting stalled might cook a winding.
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Post Fri Sep 11, 2009 6:53 am 
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andrew



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nah the motor was fine, it just wouldnt fire up, it would twitch alot but not kick over
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Post Fri Sep 11, 2009 7:09 am 
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Rotwang
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More R&D, got an outruner coming now.
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=8492
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Post Fri Sep 11, 2009 7:58 pm 
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Glen
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http://www.castlecreations.com/products/phoenix_ice.html

looks like i found my new controller Shocked Very Happy current limits too
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Post Mon Sep 14, 2009 4:34 pm 
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Nick
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That does look like a good range; which version will you get? I wonder what the "shutdown" at over current detection really means? Hope it doesn't actually shut down the controller Laughing

Post Mon Sep 14, 2009 8:20 pm 
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Glen
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Laughing well im gunna get the proper 100 amp version with the heatsink. just as soon as HC send the refund for the old one. good deal considering the two are exactly the same price.

they only started selling them late august so there isnt much info around on them. but i hope it just clamps the current at that level like the kforce one.

the term shut down is a bit worrying though Shocked
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Post Mon Sep 14, 2009 8:27 pm 
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Nick
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The 100A model gives a good safety margin and for the price of a Kforce, its a great deal. Given that it has a good heatsink and limiting, I wonder if its possible to use a lower rated model? I could really use the smaller dimensions of the 50A model in Chuck and since I couldn't make the motor draw more than 25A, a 50A ESC with protection looks tempting. The data logging wouldn't hurt either!

Post Mon Sep 14, 2009 8:39 pm 
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Glen
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i reckon so. the burst current (wonder if it literally means burst Laughing ) is 90 amps + if it does current limiting it would be fairly bullet proof.

just need to make a PC interface battery charger now and i can just keep the robot plugged in the laptop all the time

Laughing
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Post Mon Sep 14, 2009 8:43 pm 
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