In a 3 phase BLDC motor driver (voltage source inverter)....
If the commutation frequency is 3Hz then it rotates at 1 rev/second.
So the commutation period is 333milliseconds.
However, within the 333 millisecond ON times, the motor coil is PWM'd at high frequency, in order to control the current level.
The point is that sometimes this high frequency PWM'ing is not done....when it is not done, why is it not done?
Why is there literally no article on the internet which explains this?
If the commutation frequency is 3Hz then it rotates at 1 rev/second.
So the commutation period is 333milliseconds.
However, within the 333 millisecond ON times, the motor coil is PWM'd at high frequency, in order to control the current level.
The point is that sometimes this high frequency PWM'ing is not done....when it is not done, why is it not done?
Why is there literally no article on the internet which explains this?