A Novel Hybrid Excited Machine with H-type Modular Stator and Consequent Pole PM Rotor

Compact stator structure of conventional hybrid excited flux switching machines (HE-FSMs) suffer from parasitic effects of iron loss and demagnetization due to spatial harmonics in non-overlapped winding that effect electromagnetic performance i.e. average torque ( $T_{avg}$ ), torque density (Tdvg), average power ( $P_{avg}$ ), power density ( $P_{den}$ ), efficiency (n), flux controllability and flux focusing effects. To overcome the aforesaid demerits, in this paper a novel modular H-type stator core is proposed to improve electromagnetic performance, flux controllability and flux focusing effects. Proposed modular HE-FSMs operating principle is analytically discussed whereas electromagnetic performance with varying flux gaps is investigated through finite element method (FEA). Analysis reveals that despite of better flux focusing effects, modular structure ease manufacturing process, transportation, assembly, and on-site maintenance. Finally, comparison of proposed design with existing state of the art exposes that H-type modular structure offers 42.35% higher $T_{avg}$ , 42% improved $T_{den}$ , better $P_{den}$ by 48.68%, truncate $T_{rip}$ by 13.43% with boost n of 98.6 %.