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Old Apr 29, 2013, 09:21 PM
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United States, CA, Big Bear
Joined Feb 2013
114 Posts
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Will a 30A ESC ruin a 40a ESC motor?

Hey guys,

Quick question.....I just hooked up a new motor on my Bixler 2. I put a new parkzone 2200kv that requires a 40a esc....I accidentally hooked it up to my 30a esc and turned up the throttle and it made some weird noises and tried to turn....I just then realized I had the wrong esc....did I do any damage to the motor by doing this?

Picking up a 40a tomorrow.....any insight is appreciated.
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Old Apr 29, 2013, 11:38 PM
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United Kingdom, Bristol
Joined Aug 2008
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shouldn't damage it.
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Old Apr 30, 2013, 02:24 AM
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Staffs, UK
Joined Nov 2003
10,563 Posts
No damage to the motor. It could damage the ESC if you tried to run it at full power and that was more than it could take.

BTW this forum is really about building your own electronic circuits...you really wanted the Power Systems forum http://www.rcgroups.com/power-systems-13/

Steve
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Old May 04, 2013, 03:34 AM
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Romania, Dolj, Craiova
Joined Sep 2007
14,960 Posts
I doubt about this draw, I would rather suspect ESC timing.
You simply can't draw so much power with a 6" prop, simple physics laws.
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Old May 04, 2013, 02:29 PM
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Letchworth, Great Britain (UK)
Joined Jul 2004
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Quote:
Originally Posted by macentyre View Post
... I put a new parkzone 2200kv that requires a 40a esc....I accidentally hooked it up to my 30a esc and turned up the throttle and it made some weird noises and tried to turn....I just then realized I had the wrong esc....did I do any damage to the motor by doing this?....
Strictly speaking, a motor doesn't require any particular ESC rating -- it's the prop you put on the motor, and the battery volts you connect it to, that determine how many amps it's going to draw

However, if your motor is specced to take 35A, then it's prudent to use an ESC which has a bit to spare, such as a 40A. And then put a prop on that will make it draw 35A at full throttle.

Putting a smaller ESC on will do no harm to the motor though, as others have mentioned, it risks burning out the ESC if your motor/prop combo is actually drawing more than 30A. Your problem of the motor making weird noises and not starting suggests either incorrect ESC timing, as suggested in post #4, or a bad connection somewhere between ESC and motor -- could be one or more of the bullet connectors with a bad solder job, or a broken or badly-soldered wire in the ESC or the motor.
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Old May 07, 2013, 11:01 PM
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United States, CA, Big Bear
Joined Feb 2013
114 Posts
THanks guys!
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