Research Article
Research on Direct Drive Technology of the Permanent Magnet Synchronous Motor for Urban Rail Vehicles
Table 2
Comparison of PMSM four topology structures performance parameters.
| | Position and shape of permanent magnet | Total weight of permanent magnet per pole (g) | Total distortion rate of voltage harmonic(%) | Salient rate | Magnetic weakening rate |
| | Surface type | 103.2675 | 2.1 | Minimum | 0.1022 | | Segmented built-in | 90.5018 | 5.2 | Maximum | 0.1700 | | V-shaped built-in | 64.1813 | 12.5 | More | 0.2102 | | W-shaped built-in | 79.0763 | 4.1 | Less | 0.6288 |
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