Research Article
Design and Experimental Validation for Direct-Drive Fault-Tolerant Permanent-Magnet Vernier Machines
Table 3
Machine design requirements.
| | Items | FT-PMV machine |
| | Phases, | 5 | | Number of stator slots, | 20 | | Number of rotor pole pairs, | 31 | | Number of FMPs, | 40 | | Gear ratio, | −31 : 9 | | Rated voltage, (V) | 70 | | Current density, (A/mm2) | 6.57 | | Outside stator radius, (mm) | 60 | | Outside rotor radius, (mm) | 70 | | Stack length, (mm) | 60 | | Air-gap length (mm) | 0.5 | | PM thickness, (mm) | 3.2 | | Fault-tolerant tooth, (mm) | 1.9 | | Armature tooth, (mm) | 3.3 | | PM pole-arc coefficient, | 1 | | Per slot area, (mm2) | 121.8 | | Slot packing factor, | 0.6 | | Stator turns per coil, | 48 | | PM type | NdFe35 |
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