Byong-Kuk Kim

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Publications (2)1.36 Total impact

  • Article: Analysis of Inverter-Fed Squirrel-Cage Induction Motor During Eccentric Rotor Motion Using FEM
    Mi-Jung Kim, Byong-Kuk Kim, Ji-Woo Moon, Yun-Hyun Cho, Don-Ha Hwang, Dong-Sik Kang
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    ABSTRACT: Asymmetric electromagnetic force caused by the frictional worn bearing, rotor misalignment, and unbalanced rotor, etc., leads to an asymmetrical operation, vibration, and electromagnetic noise. The need for the detection of these rotor eccentricities has lead to the development of monitoring methods by increasing sensitivity and noise immunity. This paper proposes a diagnosis method for an induction motor driven by a PWM-controlled inverter considering the harmonics in a transient magnetic phenomenon. The effects of asymmetrical whirling motion are studied using the current, vibration spectrum, and back EMF of a search coil. The analysis results of rotor eccentricity could be obtained by comparing the characteristics of motors that have normal and irregular air gaps and verified reliability. Simulation and experimental results can be useful for online fault detection monitoring systems for induction motors.
    IEEE Transactions on Magnetics 07/2008; · 1.36 Impact Factor
  • Conference Proceeding: A Method for Rotor Vibration Monitoring of Induction Motor by Air-gap Flux Detection
    Don-Ha Hwang, Jeong-Woo Jeon, Dong-Sik Kang, Byong-Kuk Kim, Yun-Hyun Cho, Dong-Hee Kim
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    ABSTRACT: This paper presents results of the finite-element (FE) analysis and experiment of air-gap flux variation in induction motor when rotor eccentricity phenomenon occurs. An accurate modeling and analysis of rotor vibration in the motor are made using air-gap flux simulation, and search coils are used for measuring the actual magnetic flux. The simulated vibration system with 4-poles, 380 [V], 7.5 [kW], 1,768 [rpm] induction motor is built, and search coils are designed and inserted under the stator wedge of the motor. The FE analysis results are compared with experiment test results, and it shows that it is an effective method for developing on-line monitoring system on rotor vibration of an induction motor
    Power Electronics Specialists Conference, 2006. PESC '06. 37th IEEE; 07/2006
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