Fig.1

Alternate SWFS machine topologies derived from stator PM machines, SFPM machines"

Fig.2

Alternate SWFS machine topologies derived from stator PM machines, DSPM machines"

Fig.3

Alternate SWFS machine topologies derived from all poles wound and alternate poles wound stator PM machines and switched reluctance machines"

Fig.4

Other SWFS machine, F1A2"

Fig.5

Single-phase WFSF machine, F2A2"

Fig.6

Open-circuit field distributions and typical flux-linkage waveform of single bipolar coil in a F1A3 SWFS machine"

Fig.7

Open-circuit field distributions and typical flux-linkage waveform of single unipolar coil in a F1A1 SWFS machine"

Fig.8

Electromagnetic performance of 6 stator slot VFRMs with different rotor pole numbers pf = field winding copper loss, pa = armature winding copper loss"

Fig. 9

Comparison of non-overlapping 12 stator slot F1A1 SWFS machines having different rotor pole numbers, field current = 30 A"

Fig.10

Variation of average torque with copper loss of non-overlapping F1A1 SWFS Machines having different stator-slot and rotor-pole numbers, field winding copper loss=armature winding copper loss"

Fig.11

Comparison of non-overlapping VFRM and SWFS machines, field winding copper loss=armature winding copper loss"

Fig.12

Optimised non-overlapping SWFS (NSWFS) machines"

Fig.13

Average torques and torque ripples of non-overlapping SWFS machines, armature current = field current=30A, copper"

Fig.14

Variation of average torque with copper loss of non-overlapping SWFS machines, armature current = field current"

Fig.15

Various SWFS machines used for comparison with Toyota Prius IPM machine"

Fig.16

Comparison of average torque and torque ripple of SWFS machines and Toyota Prius IPM machine, current density=26.8A/mm2"

Fig.17

Comparison of torque and material usage efficiency of various SWFS machines and Toyota Prius IPM machine"

Fig.18

Cross-section of conventional single and partitioned stator SWFS machines"

Fig.19

Cross-sections of conventional single and partitioned stator VFRMs"

Fig.20

Variation of average electromagnetic torque with total copper loss in conventional single and partitioned stator SWFS machines"

Fig.21

Variation of electromagnetic torque with total copper loss in conventional single and partitioned stator VFRMs"