PWM collapse when the battery is connected to the ESC and BLDC.

Thread Starter

A__4268

Joined Aug 31, 2025
2
When I connect the BLDC motor and ESC to the PWM input, the signal works well. However, when I attempt to start the motor by connecting the battery to the ESC, the PWM signal collapses, and the motor does not operate.Help me with a solution........
 

Alec_t

Joined Sep 17, 2013
15,103
Welcome to AAC!
We're not mind-readers. You need to tell us, or provide links to, the specificcations of the BLDC, the ESC, your PWM generating arrangement, your power supply, and post a sketch of how you have it all wired together.
 

lichurbagan

Joined Jul 4, 2025
120
When I connect the BLDC motor and ESC to the PWM input, the signal works well. However, when I attempt to start the motor by connecting the battery to the ESC, the PWM signal collapses, and the motor does not operate.Help me with a solution........
Some motors can draw very high current at zero speed (stall current). If your ESC or battery can’t handle this, the voltage collapses.
If possible, test the ESC and motor with a smaller load or a propeller removed to see if it spins.
 

Thread Starter

A__4268

Joined Aug 31, 2025
2
Some motors can draw very high current at zero speed (stall current). If your ESC or battery can’t handle this, the voltage collapses.
If possible, test the ESC and motor with a smaller load or a propeller removed to see if it spins.
i am not using the propellers for now and still the motor is not working
 
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