Multiobjective Optimization Design of a Double-Rotor Flux-Switching Permanent Magnet Machine Considering Multimode Operation

A Novel Triple-Permanent-Magnet-Excited Vernier Machine with Double-Stator Structure for Low-Speed and High-Torque Applications

“…Similarly, the flux linkage and the back-EMF in the secondary windings can be calculated and analyzed. As shown in Figure 12, when the machine is respectively excited by outer and inner stator PMs, rotor PMs and all of the three sets of PMs, the peak values of flux linkage and back-EMF are 0.0031 Wb and 4.27 V, 0.0052 Wb and 6 V, 0.0128 Wb and 14.98 V, and 0.02 Wb and 25.17 V, respectively, which also agrees well with the results obtained from (15) and (16). From the analysis of flux linkage and back-EMF of the primary and secondary windings, it can be seen that the two sets of windings can couple with the three sets of PMs on the stator and rotor simultaneously, which is consistent with the analysis of airgap flux density in part 3.3.…”

“…Firstly, when PMs on the two stators are excited, the peak values of flux linkage in primary windings excited by outer stator PMs and inner stator PMs are 0.0086 Wb and 0.0045 Wb, respectively, and its corresponding back-EMF are 9.57 V and 6.48 V, respectively. According to the analysis of airgap flux density in part 3.3, the flux linkage and the back-EMF excited by two sets of PMs on the stator can be calculated as (15) where ψs_outer and ψs_inner are the flux linkage excited by PMs on the outer stator and inner stator, respectively, and the Es_outer and Es_inner are the corresponding back-EMF, respectively.…”

“…Furthermore, the power factor may be reduced when the higher G r is selected [13,14]. Thus, the torque density of FMPM machines can be improved by increasing the utilization ratio or consumption of PMs to increase B gmax [15,16]. The armature windings of FMPM machines are connected according to the effective harmonic component of the magnetic field in the airgap rather than the fundamental one generated by PMs directly, so it is possible to obtain effective harmonics with same pole-pair number by modulated multiple sets of PMs with different pole-pair numbers according to (1).…”

Vibroacoustic Prediction of a High-Temperature Superconducting Field-Modulation Double-Stator Machine with Stationary Seal

“…It should be noted that the main harmonic components of flux density of the inner air-gap are same as those of the outer air-gap, although the amplitudes of harmonic magnetic field components of the inner air-gap are different with those of the outer air-gap. By using Fourier transform, the flux density excited by HTS field-excitation magnetomotive force can be written as [21][22][23][24][25][26][27] air-gap. By using Fourier transform, the flux density excited by HTS field-excitation magnetomotive force can be written as [21][22][23][24][25][26][27]:…”

Multiphysical-Domain Integration Design of Oil-Cooled Permanent Magnet ISG Motor

“…Moreover, a doublerotor flux-switching permanent-magnet machine and a multiobjective optimization method were proposed. According to the design requirements of various driving modes, the response surface method and the sequential nonlinear programming algorithm were used to effectively achieve the compromise among the design objectives [18]. e mechanical structure strength of a high-speed largetorque built-in permanent magnet wheel-hub generator rotor was studied and compared with the equivalent method and FEM, and the precision application conditions for the equivalent method were proposed [19].…”