I am willing to apply for advertised PhD position in Sweden. Whom should I address my cover letter? I am willing to apply for advertised PHD position in Sweden. In the instructions to apply they have mentioned about the required documents which include CV, cover letter, transcripts. I have two questions regarding this

They have not asked for a separate statement of purpose (SOP). So, should i include my motivation and research interest in the cover letter?
Whom should i address my cover letter? to the professor who have given this advertisement or to the department or admission office?
Officially, in Sweden, it's normally the department that hires students. In practice, it's likely going to be the professor that acquired the funding who is going to evaluate candidates and make a decision. Even more in practice, your average Swedish professor won't care the least bit who you address in the letter.
If you feel you need to put in a name, put in the name of the hiring professor. If you get it wrong, it likely won't matter in the least.