Abstract
In this study, we performed the electromagnetic and mechanical characteristic analyses of an 8-pole 12-slot interior permanent magnet synchronous motor (IPMSM). Permanent magnet synchronous motors are classified into surface permanent magnet synchronous motor and interior permanent magnet synchronous motors according to the type of rotor. The IPM type is advantageous for high-speed operation because of the structure where the permanent magnet is embedded inside the rotor, and it has the advantage of having a high output density by generating not only the magnetic torque of the permanent magnet, but also the reluctance torque. However, such a motor has more vibration/noise sources than other types, owing to changes in reluctance. The sources of motor noise/vibration can be broadly classified into electromagnetic, mechanical, and aerodynamic sources. Electromagnetic noise sources are classified into electromagnetic excitation sources, torque pulsations, and unbalanced magnetic forces (UMFs). Vibration and noise cause machine malfunctions and affect the entire system. Therefore, it is important to analyze the electromagnetic vibration source. In this study, the electromagnetic characteristics of an IPMSM were analyzed through the finite element method to derive the UMF. Vibration and noise analyses were performed by electromagnetic–mechanical coupling analysis, and vibration and noise characteristics based on electromagnetic noise sources were analyzed.
Highlights
IntroductionOwing to the increasing public concern about environmental problems, such as global climate change, various technologies have been considered for this challenge
Owing to the increasing public concern about environmental problems, such as global climate change, various technologies have been considered for this challenge.ecofriendly mobility has attracted increasing attention because it contributes to reducing global warming
In the vibration/noise aspect, interior permanent magnet synchronous motor (IPMSM) suffer from more vibration/noise sources than other types of motors owing to changes in reluctance
Summary
Owing to the increasing public concern about environmental problems, such as global climate change, various technologies have been considered for this challenge. In the vibration/noise aspect, IPMSMs suffer from more vibration/noise sources than other types of motors owing to changes in reluctance. In the case of an electric motor with a high torque density, such as a PMSMs, the rate of electromagnetic vibration increases. The spatial distribution of the radial force is affected by the stator and rotor, and its magnitude changes with time; the radial force generates a vibration frequency that affects the vibration. This makes it possible to predict the electromagnetic noise/vibration characteristics generated by the motor [20–24]. Figure31ofshows the analysis flow of this study, and Table 1 lists the design specifications of the analysis model
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