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Old 01-18-2021, 03:52 PM
  #1  
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Default Brushless upgrade problems

Just upgraded my car to brushless with a 4370kv motor and a 60A ESC. Sold together as a package. Paired with a DumboRC 6x and 6xfg receiver.
Running 2s lipo 3500mah 7.4v
Regardless if I'm driving on tarmac, grass, snow....fast or slow, at 25% or 100% and even gentle throttle while on a stand with no resistance. After several minutes the car comes to a stop. ESC still running but no drive or steering. If i turn the transmitter on/off nothing. Turn the ESC on/off then it works agin for several minutes then repeats the cycle?
Transmitter programmed
Battery charged
Reciever and transmitter bound


Whats going on?

4370kv motor drawing more than 60A and shutting down ESC?

Thanks

The Specification of the Motor:
KV:4370KV
Watts:800
Max Voltage:<12V
Max Amps:66A
Rotor Poles:4
IO:3.2A
Resistance:0.0185
Max RPM:50000
Connector:4.0mm gold

The Specification of the ESC:
Cont.Current:60A
Burst Current:360A
Motor Type:Sensorless Brushless Motor
For 6s Lipo or 6 cells NiMH
1.On-road 3660-size or smaller motor with the kv <4300
2.Off-road/buggy/monster 3660-size or smaller motor with the kv <3300
For 3s lipo or 9 cells NiMH
1.On-road 3660-size or smaller motor with the kv <3300
2.Off-road/buggy/monster 3660-size or smaller motor with the kv <2600
Suitable Car:1/10 car
Resistance:0.0007ohm
Battery:2-3 cells lipo/4-9 cells NiMH
BEC Output:5.8V3A(switch mode)
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Old 01-19-2021, 05:44 AM
  #2  
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Who makes the ESC? Have you programed the temperature cut off? Or Battery voltage cut off?
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Old 01-20-2021, 04:40 AM
  #3  
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Originally Posted by tv.1982
Just upgraded my car to brushless with a 4370kv motor and a 60A ESC. Sold together as a package. Paired with a DumboRC 6x and 6xfg receiver.
Running 2s lipo 3500mah 7.4v
Regardless if I'm driving on tarmac, grass, snow....fast or slow, at 25% or 100% and even gentle throttle while on a stand with no resistance. After several minutes the car comes to a stop. ESC still running but no drive or steering. If i turn the transmitter on/off nothing. Turn the ESC on/off then it works agin for several minutes then repeats the cycle?
Transmitter programmed
Battery charged
Reciever and transmitter bound


Whats going on?

4370kv motor drawing more than 60A and shutting down ESC?

Thanks

The Specification of the Motor:
KV:4370KV
Watts:800
Max Voltage:<12V
Max Amps:’66A’
Rotor Poles:4
IO:3.2A
Resistance:0.0185
Max RPM:50000
Connector:4.0mm gold

The Specification of the ESC:
Cont.Current:’60A’
Burst Current:360A
Motor Type:Sensorless Brushless Motor
For 6s Lipo or 6 cells NiMH
1.On-road 3660-size or smaller motor with the kv <4300
2.Off-road/buggy/monster 3660-size or smaller motor with the kv <3300
For 3s lipo or 9 cells NiMH
1.On-road 3660-size or smaller motor with the kv <3300
2.Off-road/buggy/monster 3660-size or smaller motor with the kv <2600
Suitable Car:1/10 car
Resistance:0.0007ohm
Battery:2-3 cells lipo/4-9 cells NiMH
BEC Output:5.8V3A(switch mode)
It should be rather obvious that the ESC can not handle that motor, I am surprised it had not melted down. Need to find a motor your size that is a little under 60 amps or a esc that can drive 70-80A continuous.
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Old 01-20-2021, 04:55 AM
  #4  
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Location: Detroit
Posts: 3,430
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Its thermal ling. .
if you read specs #1 clearly say Under 4300kv u have a 4370k that's Over the esc limits.
get a better esc or a lower turn motor
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