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Homemade brushless motor only making a high-pitched noise and not turning. Help!

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Homemade brushless motor only making a high-pitched noise and not turning. Help!

Old 10-26-2017, 11:01 AM
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yrjosmiel73
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Default Homemade brushless motor only making a high-pitched noise and not turning. Help!

'allo!
So i've been building a custom motor for my school project and it seems that it's not turning and is only making a high-pitched noise of around 3KHz. the ESC I am using is the WP SC8 from Hobbywing. The transmitter is the FS GT3C, with the receiver that came along with it. What can I do?
Thanks!
Old 10-30-2017, 01:00 PM
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blvdbuzzard
 
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Has the Rx been bound to the Tx? The Receiver needs to be bound to the transmitter to work. Then the ESC may need to be calibrated. Other than that, are yo sure yo have the correct winding's on the correct ESC wires?


Buzz.
Old 11-01-2017, 09:22 PM
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yrjosmiel73
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Yes, I have bound it and calibrated the ESC! I'm pretty sure I have the windings right, too.
Is it possible that it's because the electromagnets are so weak they can't even pull the rotor?
Old 11-10-2017, 01:33 PM
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blvdbuzzard
 
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I would say check the winding order. You may not have them correct. Sound like they are pulling against each other. The motor should spin, at least a little if nothing else.


Buzz.
Old 11-11-2017, 06:28 AM
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yrjosmiel73
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It seems I got the winding error wrong, but I've solved that already. It still makes a high-pitched noise while the rotor is oscillating back and forth. However, turning it from a 2-pole rotor to a 4-pole solved the problem and is now spinning.
Old 11-11-2017, 09:35 AM
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blvdbuzzard
 
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WOOOHOOOO Glad you got it sorted out. I built a brushless motor once. Once was enough to teach me I will buy them.


Buzz.
Old 11-11-2017, 09:57 PM
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yrjosmiel73
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The motor is now spinning. However, it seems that it suddenly stops after around 3 seconds. The ESC just suddenly stops sending current through the motor. What can possibly cause this? The ESC (I've changed it since November 2) is a Flyfun 40A from Hobbywing.
Old 11-12-2017, 07:55 PM
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blvdbuzzard
 
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Is the battery able to keep the power flowing? If the voltage drops, the ESC will stop the motor.


Buzz.
Old 11-12-2017, 10:05 PM
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yrjosmiel73
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Oh, I'm not even using a battery. I'm using a DC power supply, supplying 22.4 V (so like 6 Lipo cells) to the ESC. There was one time when it just spinned until we cut the power, but that never repeated.

Last edited by yrjosmiel73; 11-13-2017 at 01:06 AM. Reason: I'm illiterate in english.
Old 11-19-2017, 02:33 PM
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blvdbuzzard
 
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If your power supply is not feeding it enough amps, the ESC will shut down. So 22.4v but how many amps?


Buzz.

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