Mechanical Field-Weakening Method Of A Multi-Rotor Permanent Magnet Synchronous Machine

This work presents a concept of a novel mechanical field-weakening method developed for a multi-rotor permanent magnet synchronous machine called the Planetary Motor. The electric Planetary Motor combines an electric machine with multiple rotors in a common stator and a gear set, which can be utilized for mechanical field-weakening. This work presents the theoretical background as well as measurements on a prototype equipped with this field-weakening method.