Sub-domain modelling and multi-variable optimisation of partitioned PM consequent pole flux switching machines

Permanent Magnet Flux Switching Machines (PMFSMs) enclose unique features of permanent magnet (PM) synchronous machine, direct current machine, and switch reluctance machine therefore, applicable for high speed brushless AC applications. However, conventional PMFSMs exhibits demerits of high PM volume V-PM, high torque ripples T-rip, low average torque T-avg, lower torque density T-den, power density P-den and leakage flux. In this paper, a new topology of 12S-13P and 6S-13P E-Core PM Consequent Pole Flux Switching Machines (PMCPFSM) with flux barrier and partitioned PM is proposed that eliminate leakage flux, enhanced flux modulation effects through flux barriers and reduces the PM volume up to 46.53%. Moreover, due to non-linear behaviour of PM and complex stator structure alternate analytical sub-domain model is utilized for initial design and Multi-Variable Geometric Optimization (MVGO) is opted to investigate influence of design parameters on electromagnetic performances such as T-avg, T-rip, T-den and P-den. Analysis and comparison with the existing 12S-10P E-Core PMFSM, 6S-10P E-Core PMFSM, 6S-10P C-Core PMFSM and 12S-14P C-Core PMCPFSM reveals that proposed 6S-13P PMCPFSM produced T-avg higher up to 88.8%, suppress T-rip maximum up to 14.72% and offer 2.45 times T-den and P-den capabilities, when compared with the aforesaid state of the art.