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Power Systems Talk about motors, ESC speed controllers, gear drives, propellers, power system simulators and all power system related topics

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Old 07-28-2013, 06:26 AM   #1
Virgil Kee
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Default Brushed Motor on Brushless ESC?

I just received an ESC from HobbyKing. On their web page, there is no indication that the ESC is for Bl motors, however, there are THREE motor leads! I selected it on price alone. http://www.hobbyking.com/hobbyking/s...k_10A_ESC.html

I would run the brushed motor on a 2S LiPo, so there's no problem there with this ESC.

I've searched several threads on this forum, but was unable to answer this question: Can a brushed motor be run on this ESC?

It would seem that all I have to do is to successfully ID two of the wires to find a + and a - lead; isolate the third wire, and connect these two to my brushed motor.

Ingenious or hopelessly uninformed?

Comments? -Virg.
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Old 07-28-2013, 07:16 AM   #2
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Originally Posted by Virgil Kee View Post
I just received an ESC from HobbyKing. On their web page, there is no indication that the ESC is for Bl motors, however, there are THREE motor leads! I selected it on price alone. http://www.hobbyking.com/hobbyking/s...k_10A_ESC.html

I would run the brushed motor on a 2S LiPo, so there's no problem there with this ESC.

I've searched several threads on this forum, but was unable to answer this question: Can a brushed motor be run on this ESC?

It would seem that all I have to do is to successfully ID two of the wires to find a + and a - lead; isolate the third wire, and connect these two to my brushed motor.

Ingenious or hopelessly uninformed?

Comments? -Virg.
Nope, you can NOT run a brushed motor with this brushless ESC. I'd be surprised if the brushless ESC will even turn the brush type motor over. These brushless ESC's do not have a common connection between the battery input black and white wires, and the three brushless motor leads. Between the ESC DC input, and the ESC three wire motor output is a sort of a three pole, double throw electronic toggle switch. These electronic switches are switching the positive and negative leads of battery circuit to the three leads of the brushless motor circuit many thousands of times a minute.

On the other hand, now days, those low power brushless motors are quite inexpensive, and will far outperform a brush type motor of the same physical size.

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Old 07-28-2013, 08:54 AM   #3
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"hopelessly uninformed" I'm afraid

As per previous response, there is no way at all to run a brushed motor from a brushless ESC. None of the three wires are fixed + or -, instead they each pulse sequentially.

In most cases these days there is no good reason to run a brushed motor, brushless performs much better is lighter and these days probably works out cheaper.
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Old 07-28-2013, 09:44 AM   #4
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Originally Posted by Virgil Kee View Post
It would seem that all I have to do is to successfully ID two of the wires to find a + and a - lead; isolate the third wire, and connect these two to my brushed motor.
Unfortunately the output from a brushless ESC does not have a + lead or a - lead. That's not how BL motors work.

So you're definitely buying something else...either a brushless motor to go with that ESC or a real brushed ESC to go with your motor. I suggest the former .

Steve
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Old 07-28-2013, 09:35 PM   #5
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Originally Posted by JetPlaneFlyer View Post
"hopelessly uninformed" I'm afraid

As per previous response, there is no way at all to run a brushed motor from a brushless ESC. None of the three wires are fixed + or -, instead they each pulse sequentially.

In most cases these days there is no good reason to run a brushed motor, brushless performs much better is lighter and these days probably works out cheaper.
Yeah
Should have mentioned, the output of a brushless motor ESC is three phase AC. Something easily verified with a four channel oscilloscope. (Yup, I've done it)

And, those DC motors will NOT run on AC.

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Old 07-29-2013, 02:45 AM   #6
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http://www.headsuphobby.com/Brushed-Motor-ESC_c25.htm

15 amp.brushed.motor.esc for.either lipo or not battery.
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Old 07-29-2013, 06:07 AM   #7
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Originally Posted by hayofstacks View Post
http://www.headsuphobby.com/Brushed-Motor-ESC_c25.htm

15 amp.brushed.motor.esc for.either lipo or not battery.
Or for the same money you could have a brushless motor to go with the brushless ESC. Same cost either way but brushless is better performance, lighter and lasts longer.

No competition?
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Old 07-30-2013, 04:04 AM   #8
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Default Brushed ESC?

Thanks, all. I've ordered the 15-A brushed ESC that has been suggested. I wrote a long reply (as post #3), but athough "I ......may post replies", Mr. Bourke's feeling is that I took too much time, therefore I had timed out.

Thanks again,

Vrig.
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Old 07-30-2013, 08:29 AM   #9
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To avoid the time out...

Type the post up in notepad, copy it, then open the reply window, then paste it in.

Or... there is no time limit in the quick reply.
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Old 07-30-2013, 03:39 PM   #10
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I once tried to use a brushless ESC with four brushed motors and 3 in 1 E-Flight RX on a small home-made quad 7.4v (back in the day)........not realizing (at the time) that there was the AC/DC conversion......lol....the result was not catastrophic but the RX capacitors started smelling funny for some reason and motors never turned over......the LED blinking lights worked though......lol......that's at a time when I really began learning more about the whole brushed/bushless concept!
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Old 07-31-2013, 03:40 AM   #11
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the way I read it, he already had a brushed motor and needed an esc, which is why I suggest a brushed esc.

x 1,000,000 on a.brushless upgrade if you like the plane. welcome.
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Old 07-31-2013, 06:35 AM   #12
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Default Brushed ESC?

Although I am NOT Buddhist, thanks to this thread, I have succeed in attaining the Ultimate, Highest Level of Erudition (UHLE) in matters pertaining to brushed vs. brushless ESC's.

Those of you still not having attained this lofty state, BOW BEFORE ME!

Seriously, Folks, I'm thanking all of you again,

Virg.
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