Control of BLDC Motor using Current Sensors

Projects General Guidance
1

Hello,

for a project at my university I have to create a control loop for a reaction wheel, which is driven by a brusless DC motor.
My basic idea is to use a gyroscope sensor to measure the speed of the assembly driven by the reaction wheel. With the error resulting from the desired and correct speed, I can then set up a PID controller which calculates the ideal current (both the speed of rotation and the current are proportional to the torque of motor).

Now I would like to create another current loop, which determines the difference between the ideal and the actual current at the BDCM.
How exactly can I measure the current at the BDCM and use it as an input signal for the Arduino UNO?

Thanks for all the tips! :slight_smile:

2

Look at the other topic about measuring BLDC motor attributes. I cannot imagine that current measurement helps much in driving a BLDC motor.

3

How do you plan to use that gyro?

Encoders are the more common method of measuring rpms.