What Happens when you Excessively Load a Brushless Motor
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- เผยแพร่เมื่อ 15 ก.ย. 2019
- How does a Brushless motor fail when you excessively load the motor?
Loading a brushless motor can be done in any RC application. It is as simple as providing too much gearing in an RC car or too much prop in an RC airplane.
As the motor is overloaded, it will demand more power. Since voltage in our brushless motors are constant, the only parameter that is left to change is the amount of current. Current increases and as a direct result so does the amount of heat generated. Heat generation occurs in the windings of a brushless motor. Too much heat can destroy the magnets of the rotor.
As magnets are destroyed the kv of the brushless motor increases, thereby placing more stress on the motor. This pattern continues until the windings burn up. No more windings or magnets and you now have a paperweight.
There are two methods to preventing this. First is by researching the best power system for your application. The second method is by frequently checking the temperature of your power system during its first run. Once you establish confidence in the temperature you can reduce the frequency in which you measure heat to one every handful of runs you make. - วิทยาศาสตร์และเทคโนโลยี
I ran 6s on a 4s motor. Ran good till the rotor blew apart 63.4 mph lolol. Took a few months before it blew....Great vid! 💯
Oh wow! Hope you enjoyed the 63.4mph pass while it lasted. That is moving!
I just hit 62 and my Vxl 3500 burnt up
The kv going up is a new one for me! Thanks so much for this clear vid!
I'm glad the video can help you out. Thanks for your comment!
So does the ESC act sorta like a ballast then, something to regulate the current going to the motor?
I always use a Watt-meter when testing my RC boats. Props with only a small difference in diameter and/or pitch can either raise or drop the amount of current needed quite considerably. The initial testing is done with the boat static in the water i.e. with someone holding the boat still. While running the motor at various speeds, building up to full power, I check the amount of current (amps) that the motor is pulling. If that is within range, then I test the boat further as in this video. It always works for me and it takes most of the guess work out of the equation. It saves components too!
If it works for you that's great! A watt meter can be an excellent tool to dial in a setup.
What temperature is the threshold? 130 degrees?
You one smart man
Thats why i do crazy shit like putting a 4092 6s motor in my slash 4x4. That thing does 60mph all day long pack after pack and gets just warm. Only thing is i break everything attached to thw drive trian.
Haha, sounds like fun!
I rewind my bldc it gets really hot what cause this
How do you not have more subscribers
I'm just a dude sitting on a couch. :)
Hi there, when replacing rotor can I use any brushless rotor? For example is it possible to use a sensored rotor inside a sensor less motor (stator)? Your advice would be greatly appreciated. Thank you
Hi Tristan, I have only ever replaced a rotor with the intended rotor to be used on the motor.
RCexplained thank you for getting back to me
So what happens to the stator winding?
Do they get destroyed?
The excess heat burns the coating on the wire, and it shorts-out and/or starts to burn.
Only you can prevent motor fires
why do radiator fans not use brushless motors? plenty of options for brushless to make a car last longer
My brushless motor 3660 3800kv, running in 2s LiPo. 17t pinion 64t spur. It's getting hot immediately..
Even I'm only running the motor only..
Hi Jay, what is the temperature? Hot can be a relative term. 35C is a hot day but its a cold motor temp.
@@RCexplained I can't say the exact temp but if I run it for about 2mins, I can't hold it anymore because it's too hot..
That gearing is too high. 64 spur is too small?
@@klappars I'm not even putting gear in the motor. And it gets hot..
I think the motor is grounded..
Sir you can make your videos more interesting by doing experiments.