Hello everyone, thank you in advance for the answers.
In my application I have a pmsm motor powered by a 24V switching power supply. I need to limit the maximum power to 320W (i.e. I need to limit the power supply current to about 13A). However, the power supply current is not measured, only the motor currents are measured.
So, my idea was to consider the power balance:
W of power supply =~ W motor
and limit the motor power accordingly to about 320W.
I would then go and impose a current limit on the motor that varies according to the voltages to be considered in the PID control.
I don’t know if this can be done or are there simpler ways?

 

If its a DC motor, then the simplest way is to have a bench power supply with current limiter feeding your motor.
If its an AC motor, then use the respective controller or VFD drive, which will have the current limiter option.
Or if you are designing a controller then use some thing like the one from Micro chip.
https://www.microchip.com/en-us/sol...tor-types/permanent-magnet-synchronous-motors

Since you did not mention anything about your application usage, provided a generic recommendation without considering the cost !!