Hello!
I'm needing some help.
I need to measure the eletric power of a bldc motor. It uses 90ish A of current at full speed with a 6s lipo battery. I thought about using a INA226 but I'm not sure about this choice.
What sensor do you guys recommend?
IS the current you are measuring steady or is it pulsing?
It's steady current
There are several ways of doing that. The easiest would be to place a shunt resistor in the ground lead and measure the voltage across that resistor. Anything that is dropped across that resistor is not available to the motor and is burnt as heat. Setting up an A/D to read that is tricky.
Here is an interesting link on hall sensors. How to measure current using Arduino and ACS712 current sensor You can increase the capacity of this sensor by paralleling its shunt resistor with an external resistor and measure much higher currents.
have a look at SCT-013 current clamp
has the advantage of being noninvasive - clamp the sensor around ONE of the supply cables
if it is three phase motor use three clamps, e.g. ESP32-4-Channel-Mains-Current-Sensor
I am using the ACS758LCB-100U-PFF-T hall sensor in my model airplanes to measure the actual current via telemetry and calculate the power consumption in mAh, so that i know when it is time to land.
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