• Title/Summary/Keyword: Induction Motor

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A Study on Stabilization of Multi-Excited Induction Motor (다중여자 유도전동기의 안정도에 관한 연구)

  • 강만원;김한성
    • The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.9 no.4
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    • pp.78-85
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    • 1995
  • This paper covers stability and stabilization of Multi-Excited Induction Motor used in numberous electric equipment system of industrial field. The induction motor with multi-excitation has tow sets of three-phase system : One is connected to the AC source to supply most power required at the load, and the other is to the inverter for variable frequency and/or magnitude of voltage. The conventional induction motor is operated under single excitation mode only, that is called induction mode. But in multi-excited induction motor both the induction mode and the synchronous mode are possible, and the proposed multi-excited induction motor can be driven as a synchronous motor by the extra three-phase input. At the synchronous mode the efficiency is improved so higher than that at induction mode or conventional induction motor. The rating of the inverter used for speed control of numberous electric equipment system can be reduced upto one-tenth of that for conventional induction motor. Also the cost and maintenance fee of multi-excited induction motor can be reduced compared to any other motor.

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A Study on the outside rotor type double squirrel cage Induction motor (외측회전형 이중 농형 유도전동기에 관한 연구)

  • 김현수;배철오;안병원
    • Journal of Advanced Marine Engineering and Technology
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    • v.27 no.6
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    • pp.776-782
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    • 2003
  • This paper describes a newly developed double squirrel cage induction motor in which the rotor is located outside the stator. The outside rotor type brushless dc motor has been used for VTR's head drum and PC's cooling fan, but this kind of induction motor has not been developed yet. The parameters of outside rotor type induction motor were measured from the locked rotor test and no load test. It is possible to determine the parameters which are presented in the steady-state equivalent-circuit of the outside rotor type induction motor. Load test of induction motor was carried out using a dynamometer. For the characteristics of torque, efficiency, power factor and output. the developed double squirrel cage induction motor is compared with the ordinary induction motor It is believed that the results of this paper can be used for the development of the outside rotor type induction motor.

Study of Losses segregation for Capacitor-Run Single phase Induction Motor (커패시터 구동형 단상 유도전동기의 손실분리 연구)

  • Kim, Kwang-Soo;Kim, Ki-Chan;Lee, Sang-Hoon;Lee, Ju
    • Proceedings of the KIEE Conference
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    • 2008.04c
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    • pp.16-18
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    • 2008
  • Several methods are proposed in the literature for losses segregation of single phase induction motor. Generally we could divide two methods for experimental determination of losses segregation for single phase induction motor. The one is relatively complicated method based on Parameter estimation of single phase induction motor. The other is simple method based on IEEE Standard 114. Segregation of losses in single phase induction motor is more complicated than that in three phase induction motor, because of the backward magnetic field component in the motor and multiplicity of different single phase type. In this paper, therefore, we studied losses segregation of capacitor-run single phase induction motor.

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Characteristic Comparison Analysis for Standard and High-Efficiency Induction Motor (일반 및 고효율 유도 전동기의 특성 비교 해석)

  • Kim, Jong-Gyeum
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.56 no.4
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    • pp.186-190
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    • 2007
  • This paper presents an analysis on the power characteristics of standard and high-efficiency induction motor. The parameter of induction motor play an important role in the expression of machine's performance characteristics. Induction motor can be differently found its characteristics parameters with the operation under the same capacity. So it is very difficult to detect correct parameter of induction motor. For the analysis, we discovered the motor parameters by the technical program with nameplate data. In this paper, we analyzed that how power and torque characteristics of induction motor would be changed for two kinds of motor parameters.

A Study on Design of Linear Induction Motor in Dynamic Tester for Catenary-current Collection (주행 집전계 시험기의 주행 대차용 선형 유도전동기 설계에 관한 연구)

  • Ham, Sang-Hwan;Cho, Su-Yeon;Lee, Ju
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.4
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    • pp.771-775
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    • 2011
  • This paper presents design process of linear induction motor in dynamic tester for catenary-current collection. To minimize length of rail for dynamic tester for catenary-current collection, accelerating performance of the linear induction motor is very important. So the design process of linear induction motor considered in this paper is different with general design process of linear induction motor, because dynamic tester has three type driving region, as accelerating region, constant speed region, and braking region. Considering accelerating performance of motor, distance and time from starting point to constant speed region were concerned for load condition of motor. Designed linear induction motor was analyzed by 2-dimensional finite element method. Using mechanical dynamics simulation with analysis result of 2-dimensional finite element method and accelerating performance of designed motor was proved.

Sensorless Speed Control of Induction Motor Using Observation Technique (관측기관을 이용한 유도전동기의 센서리스 속도제어)

  • 이충환
    • Journal of Advanced Marine Engineering and Technology
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    • v.23 no.1
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    • pp.96-102
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    • 1999
  • Sensorless speed estimation in induction motor systems is one of the most control engineers. Based on the estimated speed the vector control has been applied to the high precision torque control however most speed estimation methods use adaptive scheme so that it takes long time to estimate the speed. Thus the adaptive estimation scheme is not effective to the induction motor which requires short sampling time. In this paper a new linearized equation of induction motor system is proposed and a sensorless speed estimation algorithm based on observation techniques is developed. First the nonlinear induction motor equation is linearized at an equilibrium point. Second a proportional integral(PI) observer is applied to estimate the speed state in the induction motor system. Finally simulation results will assure the effectiveness of the new linearized equation and the sensorless estimation algorithm by using PI observer in the nonlinear induction motor system.

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Using the Under Voltage Load Shedding for Stability Enhancement of Power Systems Considering Induction Motor Load (유도전동기 부하 고려 시 저전압 부하차단을 이용한 전력계통 안정도 향상 방안)

  • Lee, Yun-Hwan
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.65 no.1
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    • pp.1-6
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    • 2016
  • Recently, proportion of the induction motor load is gradually increased. When a contingency in the power systems, it has been discovered phenomenon that the voltage is delayed recover caused mechanical characteristics of the induction motor load. It can be a serious impact on the voltage stability of the power system considering induction motor load. The scheme to mitigate this phenomenon tripping off the motors to prevent voltage drop and delayed voltage recovery on the load demand side. Fault induced delayed voltage recovery phenomenon is caused by stalling of small induction motor load in transmission level contingencies. In this paper, fault induced delayed voltage recovery phenomenon mitigation method implementation under voltage load shedding on the korean power system considering induction motor load.

A Study on Dynamic Characteristics of Induction Motor System (유도전동기 시스템의 동특성 연구)

  • Lee Hyoung-Woo
    • Journal of the Korean Society for Precision Engineering
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    • v.23 no.5 s.182
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    • pp.128-136
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    • 2006
  • To predict the noise and vibration characteristics of induction motor system, it is necessary to develop the mathematical model including all the mechanical elements such as shaft, blower, rotor, fan, bearing, case and mounting parts. Coupling effect between case-mount system and rotor- shaft system including shaft, blower, rotor, fan and bearing is examined. Impact exciting experimentation was done in order to verify vibration model of the induction motor system. From experimental results, we can appreciate that the natural frequencies of induction motor system are in good agrements with analysis.

Speed control induction motor (속도제어형 유도전동기)

  • 오상세;박창엽
    • 전기의세계
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    • v.17 no.1
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    • pp.6-10
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    • 1968
  • To control of the speed of induction Motor, a variable frequency power supply is needed. But this New type induction Motor Constitute stator and Rotor with New principle, its speed can be easily and widely Controlled by changing phase of the stator, and start at low current than rating without starter. Also, its no load current is same as shart current, and speed increase in proportion to current. On this points this induction Motor for speed control is different from induction Motor using Now.

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The Real-Time Control of 3-Phase Induction Motor by DSP Application of Tuning Parameter Using Load Torque Observer and Neural Network (부하관측기와 신경망에 의해 설정된 파라미터의 DSP 적용에 의한 3상 유도전동기의 실시간 제어)

  • 권양원;윤양웅;강학수;안태천
    • 제어로봇시스템학회:학술대회논문집
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    • 2000.10a
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    • pp.135-135
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    • 2000
  • In this Paper. the DSP implementation of induction motor drive is Presented on the viewpoint of the design and experiment. The speed estimation of control system for induction motor drive is designed on the base of neural network speed estimator. This neural network speed estimator is experimentally applied to the induction motor system. This system Provides the satisfactory results.

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