Brushless Motor Construction Discuss design and construction of custom Brushless motors

Correct motor setup

Old 08-15-2022, 07:40 PM
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jangodog
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Default Correct motor setup

Hi when i connect he Turnigy and the little motor from Eflite to this esc the esc getís pretty hot. Think the turnigy requires an 40 amp esc but the one from Horizon/Eflite comes from a 30 amp pro also from Eflite. Thoughts? Do i need anther 30 amp esc and have this one i mind for 40amp: https://www.motionrc.eu/products/fre...=8121359204401
Or should i go for a 2S setup for the 1000KV motor?
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Old 02-14-2023, 08:36 PM
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quorneng
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jangodog
What you really need is a Wattmeter!
https://campaign.aliexpress.com/wow/..._id=1084300508
Connect between the battery and ESC it will tell you how many amps and Watts is actually being drawn. You can then make realistic decisions on what you actually need!
As it gives a real time reading as well as the peak It will enable you to stop before you "cook" an ESC or even possibly a motor. Preventing just one such incident and the Wattmeter has paid for itself!
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Old 02-14-2023, 09:39 PM
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jangodog
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Originally Posted by quorneng View Post
jangodog
What you really need is a Wattmeter!
https://campaign.aliexpress.com/wow/..._id=1084300508
Connect between the battery and ESC it will tell you how many amps and Watts is actually being drawn. You can then make realistic decisions on what you actually need!
As it gives a real time reading as well as the peak It will enable you to stop before you "cook" an ESC or even possibly a motor. Preventing just one such incident and the Wattmeter has paid for itself!
Hi. Old thread but anyways i have a wattmeter
and will surely use for my next setup.
Thankís though.
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Old 02-18-2023, 11:01 PM
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Wildflyer
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I had a strange thing happen about 20 years ago.
I hooked up a small can-type motor, (I am thinking of motors that have an outer case that is all one piece formed in a press of some kind.)
I was using a Castle Creations 25 amp speed control, this motor only uses 8 amps from a 3s battery so I was well within the ratings of my ESC
The ESC got HOT at about 25% throttle, wattmeter reading 2 amps, But it would cool off at full throttle at 8 amps.

After playing around for 2 hours with that ESC on different motors pulling up to 20 amps, the ESC stayed cool. I got pissed and called CC on the phone, I got to talk with an engineer about this.
He called my little can motor a high-wind motor that was sending more voltage back to the ESC than it could handle at minimum throttle but at full throttle, it would be fine because less voltage came back. He advised me not to use that ESC on that motor, but some others could handle it fine.
ESC was great, I tossed the motor.

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Old 02-19-2023, 07:34 AM
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solentlife
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Wattmeter ...... QED
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Old 03-28-2023, 01:40 PM
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SimonLI
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Thanks for the tips. A wattmeter saved me from burning out the motor.
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Old 03-28-2023, 06:20 PM
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solentlife
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Originally Posted by Wildflyer View Post
I had a strange thing happen about 20 years ago.
I hooked up a small can-type motor, (I am thinking of motors that have an outer case that is all one piece formed in a press of some kind.)
I was using a Castle Creations 25 amp speed control, this motor only uses 8 amps from a 3s battery so I was well within the ratings of my ESC
The ESC got HOT at about 25% throttle, wattmeter reading 2 amps, But it would cool off at full throttle at 8 amps.

After playing around for 2 hours with that ESC on different motors pulling up to 20 amps, the ESC stayed cool. I got pissed and called CC on the phone, I got to talk with an engineer about this.
He called my little can motor a high-wind motor that was sending more voltage back to the ESC than it could handle at minimum throttle but at full throttle, it would be fine because less voltage came back. He advised me not to use that ESC on that motor, but some others could handle it fine.
ESC was great, I tossed the motor.
I would have changed the ESC timing ......
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Old 03-29-2023, 06:56 PM
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Wildflyer
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The CC engineer emailed me 2 different programming software for the ESC. None of them had any effect on the heating problem. All of the things the engineer told me to try had any effect on it either.

He admitted that a different brand of ESC may handle it just fine, but at that time I was standardizing on CC 25amp ESCs We worked on this thing for 4 days, and he was very helpful in telling me a lot about how ESCs work.


The garbage can fixed everything.
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