Electrically Excited Synchronous Machine with Additional Permanent Magnets for Traction Application

This paper presents a novel hybrid permanent magnet and electrically excited synchronous machine in a realistic scenario for traction application. This concept is well known since it combines the advantages of interior permanent magnet synchronous machines and electrically excited synchronous machines in base load and flux weakening regions. With the help of magnets, the efficiency in whole base load region is increased and an improvement in WLTP cycle efficiency of 0.6 % can be achieved.