The rapid advancements in electric mobility and the increasing demand for high- efficiency, high-performance traction systems are driving car manufacturers to explore innovative motor technologies. In this context, Variable Flux Permanent Magnet Syn- chronous Machines have emerged as a promising alternative to conventional PMSMs, offering improved efficiency and an extended speed range by dynamically adjusting their magnetic flux. This thesis explores the characteristics, modeling, and control of VF-PMSMs. The study, conducted as a part of a collaborative research project with Volvo Cars, begins with an overview of VF-PMSMs, detailing their classification and working prin- ciples. A case study motor is introduced, followed by the development of its dynamic model.