Hello, I would like to know if there are transformers more suitable for simulating wireless charging coils, which are a type of loosely coupled transformer. The two models in the library that I tried do not match the actual situation very well. Additionally, I am unsure about the measurement method for Rm.
Perhaps you could clarify what you are looking for in your model and how you have characterized your WPT coils?
Which components are you using in PLECS? For the Mutual Inductor you can enter an NxN inductance matrix. If the inductance is time varying then the Variable Inductor is most appropriate, which can also accept inductance matrices as inputs. There are other modeling approaches as well.
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Thank you for your reply. First of all, my WPT system is as shown in the following picture. There are two large square coils in the box. I tried using the T-type equivalent excitation inductance model in PLECS, but the effect was not very good. The inductance of our coils is not time-varying. In practice, only the inductance and mutual inductance can be measured. Should I build a magnetic circuit according to the tightly coupled transformer in the example? But for my loosely coupled system where the magnetic cores on both sides are not connected, how should I model it?
Unfortunately, there is not image attached- can you try again?
https://b23.tv/4e1dFTQ
A transformer similar to the one in this video
I apologize but my Chinese is a bit rusty 
This sounds more like a “modeling and measurement” problem where you are not sure how to characterize your loosely coupled transformer. There are many resources on how to measure a two-winding transformer (for example) and it is a good topic to discuss with colleagues. You can either determine the mutual inductances or the coupling factor. Once that is done then the Mutual Inductor component in PLECS is a logical choice. See the equation relating coupling factor and mutual inductance in the documentation excerpt below.
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