• Title/Summary/Keyword: 전동기 소음

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Transient Dynamic Analysis of a Dynamci Eccentric Rotor with Unbalanced Magnetic Forces in BLDC Motors (BLDC 전동기의 동적 편심 및 전자기적 불평형력을 고려한 편심 회전자의 과도 동적 해석)

  • 김태종;황상문;박노길
    • Journal of KSNVE
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    • v.10 no.3
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    • pp.401-409
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    • 2000

  • Vibration of a BLDC motor is a coupled phenomenon between mechanical characteristics and magnetic origins through the motor air-gap. When a relative misalignment of rotor in the air-gap center exists on the assemblage it is considered to influence the motor system characteristics, depending on the degree of misalignment. The rotor-motor system used in a washing machine is modeled using FE-TM and a magnetic force of BLDC motor with radial rotor eccentricity is analyzed. And the transient whirl responses of a rotor system with relative misalignment in the motor air-gap are investigated considering mechanical origins and magnetic effects. Results show that rotor misalignment in the air-gap affect the vibration of the rotor-motor system.

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Development of Lorentz Force Type Integrated Motor-Bearing System in Dual Rotor Disk Configuration (두 장의 원판형 회전자를 갖는 로렌츠형 자기 베어링 내장 전동기의 개발)

  • Park, Sung-Ho;Lee, Chong-Won
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2005.05a
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    • pp.935-940
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    • 2005

  • In this paper, dual rotor disk configuration with a coreless stator is proposed for the Lorentz force type integrated motor bearing system. An experimental compensation for the effects of high order harmonics is performed using the digital controller of the experimental setup. The runout profile and rotor unbalance are also identified by the extended influence coefficient method. The experimental results confirm that this compensation method effectively attenuates the rotor vibration all over the operating range of rotational speed.

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