Vibration-Generation Mechanism and Reduction Method in Linear Iron-Cored Permanent-Magnet Synchronous Motors at Stationary State

Kim, Eun Kyu; Song, Wontaek; Kwon, Yoon Sik; Kim, Jae Hyun; Yoon, Hyeong Min; Lee, Hyo Geon; Yoon, Jun Young

doi:10.1109/tmech.2021.3139959

Cited by 11 publications

(2 citation statements)

References 31 publications

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“…Modal testing not only measures modal damping ratios but also provides validation for modal frequencies and mode shapes obtained through analytical calculations and finite element simulations. This delves deep into the modal characteristics of the rotor, unveiling the internal stress states [13].…”

Section: Introductionmentioning

confidence: 99%

Analysis of bending and torsional modal of PMSM rotor systems for EV

Wang,

2024

J. Phys.: Conf. Ser.

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The rotor system is crucial in the all-in-one integrated power system of EV, making the study of its dynamic mechanical performance at high speeds imperative. This paper focuses on analyzing the modal characteristics of EV rotor systems and the impact of individual components on bending and torsional vibrations. Using finite element analysis (FEA), a modal analysis of a 100 kW high-speed electric motor rotor is conducted, followed by experimental tests using an exciting method. Comparing simulation with experimental results reveals how end caps and bearings reduce the rotor’s bending natural frequency (BNF), while the core increases it. Additionally, the addition of rotor components leads to varied reductions in the rotor’s torsional natural frequency (TNF). Furthermore, the error between FEA and experimental values for combined rotor modes remains within 3.53%, affirming the accuracy and reliability of the analysis in predicting rotor modal characteristics.

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Section: Introductionmentioning

confidence: 99%

Analysis of bending and torsional modal of PMSM rotor systems for EV

Wang,

2024

J. Phys.: Conf. Ser.

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“…The compressor system comprises three main parts: motor, drive, and compression, which affect the efficiency of the compressor system. In particular, the driving mode is closely related to multi-physics characteristics such as the efficiency and noise/vibration of the motor [14]- [21].…”

Section: Introductionmentioning

confidence: 99%

Multi-Physics Characteristics of PMSM for Compressor According to Driving Mode Considering PWM Frequency

et al. 2022

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When pulse width modulation (PWM) technique is used for permanent magnet synchronous motors (PMSMs) for compressors, current harmonics in the carrier frequency domain are inevitably generated. These current harmonics not only affect losses in PMSM and drive, but also create harmonic components of the electromagnetic force, which causes noise/vibration. Since the amplitude and harmonic order of the current harmonics depend on the driving mode, the efficiency and noise are also affected by the driving mode. Therefore, this paper presents the comparison of the efficiency, noise, and vibration characteristics of compressor PMSM according to the driving mode. In particular, space vector PWM (SVPWM), discontinuous PWM (DPWM), and square-wave modes were analyzed. First, the characteristics of the experimental current waveform for each driving mode are analyzed, and the time and spatial orders of the electromagnetic force are calculated based on the Maxwell stress tensor method. Then, based on the derived electromagnetic force, the noise/vibration characteristics of PMSM are analyzed. The efficiencies of PMSM, driving, and total (PMSM+drive) were compared according to driving mode. It was confirmed that there is a trade-off relationship between efficiency and noise/vibration according to the driving modes. All results were analyzed using finite element analysis and experimentally verified using manufactured motor.INDEX TERMS Carrier frequency, compressor, efficiency, electromagnetic force density, noise and vibration, permanent magnet synchronous motor (PMSM), pulse width modulation (PWM)

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