Performance analysis of IPMSM based on stress calculation of iron core

Cao, Haidong; Wang, Shuang; Huang, Surong

doi:10.1109/itec-ap.2017.8080998

Cited by 2 publications

(3 citation statements)

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“…In the IPM, the design of a bridge to secure the stability of the rotor against high-speed rotation is important, and the width is determined by the stress-limiting condition of the rotor core. Considering only the electromagnetic characteristics, it is recommended to narrow the width of the bridge in each barrier layer to minimize the leakage of the magnetic flux remaining in the rotor as well as maximize the saliency ratio [11,12]. However, if the width of the bridge is designed to be narrow, and the driving speed of the device increases according to the requirements, the bridge of the rotor may be damaged by the centrifugal force generated by the rotation of the motor.…”

Section: Rotor Stress Analysismentioning

confidence: 99%

“…In the motor designer's aspect, it is essential in the design stage to select the appropriate bridge width through electromagnetic and structural analysis of the rotor, as well as to determine whether the rotor core is damaged at operating speed through stress distribution. In this study, the stability was identified based on the safety factor derived from the maximum stress generated from the rotor, and the safety rate was derived using Equation (12). Table 2 show the mechanical property of core and permanent magnet of rotor.…”

Section: Rotor Stress Analysismentioning

confidence: 99%

“…tion. In this study, the stability was identified based on the safety factor derived from the maximum stress generated from the rotor, and the safety rate was derived using Equation (12). Table 2 show the mechanical property of core and permanent magnet of rotor.…”

Section: Rotor Stress Analysismentioning

confidence: 99%

See 2 more Smart Citations

Electromagnetic and Mechanical Analysis and Measurements of Interior Permanent Magnet Motors Based on Equivalent Magnetic Circuit Method

Lee

Bang

et al. 2022

Machines

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This paper is about the magnetic field analysis of an interior permanent magnet motor (IPM motor) by using the equivalent magnetic circuit method (EMC method), which requires a small amount of computation time compared with the finite element method (FEM). IPM motors have a specific shape of rotor in which the permanent magnets are embedded. Therefore, in the bridge region, the magnetic saturation is generated due to the shape of the permanent magnet, which affects the magnetic flux density distribution in the air gap and the characteristics of the IPM motor. Thus, to design an IPM motor, the magnetic saturation effects should be considered along with the rotor shape. In addition, because the rotor of the IPM rotates at a high speed directly in connection with the load, the stress generated from the rotor must be stably distributed. Consequently, according to the rotor shape characteristics of the IPM, the stress is concentrated in the thin bridge region during high-speed rotation. When the stress generated in the bridge region exceeds the yield stress of the rotor iron core material, the bridge part is destroyed. Therefore, it is important to analyze the stress that occurs in the rotor during high-speed rotation in the rotor design stage of the IPM. In this study, we analyzed the magnetic field characteristics of an IPM motor using its equivalent magnetic circuit while considering the magnetic saturation in the bridge region. The stability of the rotor was determined by presenting a safety factor based on the maximum stress generated at the rotor for each speed. We derived the stator natural frequency to evaluate the resonance possibility between the electrical frequency and the stator natural frequency. Finally, the validity of the constructed equivalent magnetic circuit was verified by comparing the results with those obtained via the FEM analysis and experiments.

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Section: Rotor Stress Analysismentioning

confidence: 99%

Section: Rotor Stress Analysismentioning

confidence: 99%