Torque Improvement and Magnetic Flux Leakage Reduction in Interior Permanent Magnet Axial Flux Motors With Flux Barrier Structure

Abstract

Magnetic flux leakage, a significant issue in motors that hinders performance and torque production, was investigated in this study. This study focused on analyzing the impact of varying the thickness of a flux barrier embedded within the rotor of interior permanent magnet axial flux motors. Magnetic properties, including torque, leakage flux ratio, and inductance, were evaluated through simulation and analysis to understand the influence of the flux barrier on the motor’s characteristics. The results demonstrated significant improvement: the motor using the flux barrier exhibited an 11.28% reduction in leakage flux and a torque increase of 6.85 Nm compared to the conventional motor. Additionally, the design achieved maximum torque with a 2 mm thick barrier and a 10° phase angle. This study highlights the effectiveness of the flux barrier structure in enhancing the performance of axial flux motors and suggests valuable insights for motor design.

Keywords

• Axial flux motor
• flux leakage calculation
• reduction magnetic flux leakage
• soft magnetic composite core
• torque improvement