Topology Optimization of an IPM motor using JMAG designer

Motor design requirements are becoming more sophisticated. While satisfying the torque ripple rate and back electromotive voltage, line voltage limits, magnet demagnetization resistance, the stress on cores, and displacement constraints due to centrifugal force, it is required that torque is maximized at both low and high speeds.

Optimization that uses FEA is effective in satisfying these strict requirements. Design proposals can be obtained with a high degree of freedom because topology optimization can perform searches that are not dependent on initial shapes.
Magnetic field and structural coupled analysis is run in this example. While accounting for rotor core strength, topology optimization that uses the density method is used to perform searches for a rotor shape that maximizes average torque.

Topology optimization can be done by sensitive method and NGnet method.