Electromagnetically optimized design for high-speed permanent magnet synchronous motor by Taguchi iteration

Aim to optimize performance by high-speed permanent magnet synchronous motor under rated operating conditions, rated torque, torque ripple, stator core loss, and magnetic density amplitude are taken as performance parameters to be optimized．Improved Taguchi iterative optimization algorithm was used to study influence of stator outer diameter, air gap length, magnet outer diameter, axial length and stator slot depth．An orthogonal test matrix was established, ANSYS electromagnetic simulation software was used to simulate and calculate motor performance．To ensure that back EMF line voltage and rated torque performance were within limit, parameter combination with lowest stator core loss and smallest magnetic density amplitude was preferred．Simulations confirmed that performance after iterative optimization by improved Taguchi method was greatly improved．Rated torque performance was reduced by 5.2%．Torque ripple was reduced by 49.3%．Stator core loss was reduced by 35.5%．Magnetic density amplitude was reduced by 13.1%．The overall motor performance was optimized．Compared with traditional full-level orthogonal optimization, this current design reduced total number of simulations, improved optimization efficiency, and showed confirmed practicability．