Modeling and Analysis of Equivalent Magnetic Network Model for Novel Asymmetric Rotor Permanent Magnet-assisted Synchronous Reluctance Motor

This paper presents a novel asymmetric rotor permanent magnet-assisted synchronous reluctance motor (NAR-PMa-SynRM) designed to enhance torque output and reduce torque ripple by employing unconventional methods compared to traditional approaches where permanent magnets are embedded within magnetic barriers. In this design, tile-shaped permanent magnets are embedded along the rotor d-axis, coupled with an asymmetric magnetic barrier structure. To streamline the motor design process, a nonlinear equivalent magnetic network (EMN) model tailored to the distinctive structure of the NAR-PMa-SynRM is proposed. However, modeling the complex magnetic barrier structure poses a significant challenge in magnetic network modeling. To address this challenge, an effective method for representing the magnetic barriers equivalently is proposed to enhance modeling accuracy. Finally, the effectiveness of the proposed equivalent barrier method and magnetic network model is validated by comparing air gap magnetic flux density results obtained from finite element and magnetic network simulations.

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