Contents
How do I match battery with ESC?
Your ESC should match the battery voltage, for example, a 3-cell battery with 11.1V can be paired with a 12V ESC. The Amp rating is the most important factor to remember here. Your ESC should have a threshold amp rating of about 10% more than the burst rating of the motor.
What does the amp rating on an ESC mean?
When an ESC has a labelled amp rating, the manufacturer is usually referring to the continuous current that the ESC could supply to the loads (usually the motor). Since the motor is usually the largest load, it is important to match up the motor and ESC ratings.
Why does the ESC draw what it draws?
For the most part, the ESC draws what it draws given the motor, battery and load on the motor. Some of the better ESC’s do have current limiting, but experience in the flying field is that if you dork the thing into the dirt at full throttle, chances are that you’ll damage the electronics due to overcurrent.
What is the relationship between ESC, batteries and motor?
Working voltage of the motor is decided by the ESC, whilst the voltage of ESC is decided by the output of batteries. Hence the total voltage of batteries must be equal or less than the maximum voltage of motor. Maximum voltage of ESC should not be higher than what the motor can suffer. Current in ESC is larger than motor.
Are there any ESC’s that limit the current?
Some of the better ESC’s do have current limiting, but experience in the flying field is that if you dork the thing into the dirt at full throttle, chances are that you’ll damage the electronics due to overcurrent. An ESC could be designed to limit current in such a way (I’ve designed industrial motor controllers that do), but AFAIK ESC’s don’t.
How much current does a BLDC motor have?
This is typically Imax = 8 to 12 times the rated current in modern BLDC, high-efficiency DC motors. Here they generously rate the motor current with a 180 second limit. This would be at max internal temperature.