I'm measuring the current through a 100W motor with a 50A current sensor and I'm getting reasonably good data but there's also a fair amount of noise:
This is the current sensor I'm using. It measures current on the high side of the motor coming from a 3s1p lithium ion battery pack. To collect the data, I'm using the 10-bit ADC on an Arduino nano and saving it to an SD card the sampling rate is about 30ms.
There is no PWM controlling the motor, only a switch.
Is this normal for motor current data? If I used the 30A current sensor (instead of 50A) would the data be less noisy? Where is this noise coming from?
Thanks in advance.