Asymmetric rotor interior permanent magnet motor 1 Asymmetric rotors Demagnetization 1 Electric motors 1 Interior permanent magnet motors 1 Manufacturing uncertainty 1 Multi-objectives optimization 1 Multiobjective optimization 1 Performance 1 Performance robustness 1 Permanent magnet demagnetization 1 Permanent magnets 1 Physical performance 1 Structural optimization 1 Torque 1 Torque performance robustness 1 asymmetric rotor interior permanent magnet motor 1 manufacturing uncertainties 1 multi-objective optimization 1 permanent magnet demagnetization 1 torque performance robustness 1