We learn that inductors introduce phase delay between voltage and current for AC. On a DC-DC converter, such as boost, we have, at the inductor, a DC component superimposed with AC component with many harmonics (i.e. triangle). As the boost converter voltage, we have a square wave.
Many researchers discuss phase error between I and V, and that it is especially significant for low permeability cores. How would one go about measuring the phase between the two (in the context of a Boost converter)?
To help illustrate the question and why I am confused by this, I have attached an image of the voltage and current of the inductor of a boost converter. The converter is operating at 30% duty cycle. The inductor's core magnetic material is a low permeability sendust (\$\mu_r = 75\$). Is there even a phase shift here?
Edit: Thanks for the suggestion, here are some papers where phase delay is discussed:
https://ieeexplore.ieee.org/document/7930799 Addresses the error introduced by the phase delay https://ieeexplore.ieee.org/document/7846098 Addresses the error introduced by the phase delay https://ieeexplore.ieee.org/document/5542385 Talks about it in his article and adresses it https://ieeexplore.ieee.org/document/6559314 Also addresses phase delay (This one on a Boost converter as well) https://ieeexplore.ieee.org/document/4432686 Also addresses the issue.