Optimization of Magnet Arrangement in Double-Layer Interior Permanent-Magnet Motors

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  • 二層IPMモータの磁石配置最適化
  • ニソウ IPM モータ ノ ジシャク ハイチ サイテキカ
  • Optimization of magnet arrangement in double‐layer interior permanent‐magnet motors

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The arrangement of permanent magnets in double-layer interior permanent-magnet motors is optimized for variable-speed applications. First, the arrangement of magnets is decided by automatic optimization. Next, the superiority of the optimized motor is discussed by the d- and q-axis equivalent circuits that consider the magnetic saturation of the rotor core. Finally, experimental verification is carried out by using a prototype motor. It is confirmed that the maximum torque of the optimized motor under both low speed and high speed conditions are higher than those of conventional motors because of relatively large q-axis inductance and small d-axis inductance.

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