Hello all,
My question is quite similare as this post :
https://forum.allaboutcircuits.com/threads/how-to-add-3-phase-currents-for-total.51874/#2
The problem is that I could not reply on this post because it is too old, and it does not really answer the main question of the topic. So here I go:
Scope:
I use a BLDC motor controlled by the Space Vector Pulsed Width Modulation (SVPWM) driving method.
The motor is 3-phases Y configuration.
I have a 3 current sensors on each 3 phases (The sum of the 3 values are equal to 0).
I do not have a current sensor on the power supply line.
Problem:
What I would like to get is the value of the current given to the motor from the power supply. I can not find the relation between the current I measure on the phases and the current of the power supply.
My hypothesis:
I get the maximum current value over the 3 phases and apply a coefficient to compute the input current. But if I change the motor, this coefficient does not fit anymore. So maybe there is a relation with the motor parameters (Impedance, inductance ...)
Do you have any idea to guide me please.
My question is quite similare as this post :
https://forum.allaboutcircuits.com/threads/how-to-add-3-phase-currents-for-total.51874/#2
The problem is that I could not reply on this post because it is too old, and it does not really answer the main question of the topic. So here I go:
Scope:
I use a BLDC motor controlled by the Space Vector Pulsed Width Modulation (SVPWM) driving method.
The motor is 3-phases Y configuration.
I have a 3 current sensors on each 3 phases (The sum of the 3 values are equal to 0).
I do not have a current sensor on the power supply line.
Problem:
What I would like to get is the value of the current given to the motor from the power supply. I can not find the relation between the current I measure on the phases and the current of the power supply.
My hypothesis:
I get the maximum current value over the 3 phases and apply a coefficient to compute the input current. But if I change the motor, this coefficient does not fit anymore. So maybe there is a relation with the motor parameters (Impedance, inductance ...)
Do you have any idea to guide me please.