• Title/Summary/Keyword: Stator winding

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Analysis of Partial Discharge Patterns in the Pumped Storage Generator Stator Windings (양수발전기 고정자 권선에서 부분방전 패턴의 분석)

  • Kim, Hee-Dong;Ju, Young-Ho
    • Proceedings of the KIEE Conference
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    • 1999.11d
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    • pp.1015-1018
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    • 1999
  • Partial discharge patterns were analyzed in the pumped storage generator stator winding. These were measured using partial discharge analyzer(PDA) and digital partial discharge detector(PDD). Slot discharge was discovered in phase A. Discharges at conductor surface were occurred in phase B and in Phase C. Partial discharge patterns from on-line PDA system were compared with those off-line PDD system. The results of two systems are very same in phase A, B and C.

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enerator During the State of Torsional Interaction (비틀림 상오작용 상태에 있는 터어보 발전기의 전기적 특성)

  • Lee, Eun-Ung
    • The Transactions of the Korean Institute of Electrical Engineers
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    • v.37 no.1
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    • pp.10-17
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    • 1988
  • The torsional resonance of the generator shaft system has the possibility of inducing voltages across the stator winding because it is a carrier with the field excitation. And these torsional induced stator currents inducs the eddy current in the rotor. This paper describes the eddy current based on the double Fourier series method. The forces generating during the torsional interaction are computed using the Maxwell's magnetic stress tensor for each of the Fouriercomponennts. And then, these forces of the Fourier components are evaluated by the Parseval's theorem.

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Preliminary Design Analysis of Low Speed Interior Permanent Magnet Machine with Distributed and Concentrated Windings

  • Ahsanullah, Kazi;Dutta, Rukmi;Rahman, M.F.
    • Journal of international Conference on Electrical Machines and Systems
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    • v.3 no.2
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    • pp.139-147
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    • 2014
  • The paper presents a systematic comparison of four topologies of the interior permanent magnet machine (IPMM) designed for low speed applications. This comparative study investigates the suitability of the concentrated winding and distributed winding in the stator and the flat-shaped or V-shaped magnets in the rotor poles. The paper also studies the inductance characteristics of the designs using finite element analysis. Various steps taken to minimize the cogging torque and torque ripple in the studied machines were also discussed in details.

A Study on the Design of Single-Phase Capacitor-Run Induction Motor (콘덴서형 단상 유도전동기의 설계에 관한 연구)

  • Kim, Bok-Ki;Park, Jun-Suk;Chung, Tae-Kyung
    • Proceedings of the KIEE Conference
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    • 1996.07a
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    • pp.121-123
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    • 1996
  • Capacitor-run motor has a capacitor id series with the auxiliary winding for normal running connections. After the shape of stator and rotor are determined, the motor is designed with variables such as winding distributions or capacitance except punching variables. In this paper, the winding distribution and the turn ratio was taken as design variables because the winding distribution affects the torque and efficiency. And capacitance was selected as an additional variable. Simulation results show the validity of proposed method.

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Diagnosis for Winding Open Fault of DC Motor (권선 단선 고장 DC 모터의 진단)

  • Yang, Chul-Oh;Pyo, Yeon-Jun;Kim, Jun-Young;Park, Kyu-Nam;Song, Myung-Hyun
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.2073-2074
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    • 2011
  • In this study, an algorithm for diagnosis of dc motor with winding open fault is suggested. A dc motor used in this paper, is consisted of a permanent magnet field stator, double 16-turn series winding rotating armature with 12-slot, brush and 12-commutator, etc. A current signal of dc motor which has brushes and commutatorswas considered for fault diagnosis. By commutation, this current signal shows different wave form according to the fault condition of the motor. In this study, operation of the data was easily through simplification of the current signal by the signal processing. Computation method is presented reference value(Cdv) for diagnosis of winding open fault and verified through experiments that can be diagnosed using the reference value(Cdv).

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Characteristic Comparison of IPMSM according to Armature Winding (전기자 권선 방법에 따른 매입형 영구자석 동기 전동기의 특성 비교)

  • Park, Su-Beom;Kwon, Soon-O;Kim, Sung-Il;Hong, Jung-Pyo
    • Proceedings of the KIEE Conference
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    • 2006.07b
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    • pp.785-786
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    • 2006
  • Performance comparison of IPMSMs with distributed and concentrated winding is presented in this papcr. Two IPMSMs have been designed and fabricated with identical rotor dimension, air-gap length, series turn number, stator outer radius, and axial length except winding configuration. Basic parameters and machine performance, such as resistances, back emf, output torque, and efficiency, are compared. From the comparison results, motor design considering winding configuration is discussed.

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A New Current Sharing Strategy of SRM Using Parallel Winding Method (병렬권선 방식에 의한 SRM의 부하전류분담)

  • 박성준;이동희;안진우;안영주
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.52 no.4
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    • pp.154-160
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    • 2003
  • The switched reluctance motor(SRM) has a considerable potential for industrial applications because of its high reliability as a result of the absence of rotor windings. In some applications with SRM, a parallel switching strategy is often used for cost saving, increasing of current capacity and system reliability. This paper proposes a new parallel switching strategy of SRM using parallel winding. While conventional parallel switching devices are connected in a phase winding, power devices are connected in the parallel windings wound in each pole of stator in the proposed method. Paralleling strategy for current sharing in the proposed method can be easily determined without considerations of any nonlinear characteristics of power devices such as conduction resistance, threshold voltage and gain factor. The proposed paralleling strategy is verified by the mathematical analysis and experimental results.

Winding Inductance of High Speed Slotless Permanent-Magnet Brushless Machines (초고속 슬롯리스 영구자석 브러시리스 기기의 인덕턴스 특성)

  • Jang, S.M.;Ryu, D.W.;Jeong, S.S.;Choi, S.K.;Ham, S.Y.
    • Proceedings of the KIEE Conference
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    • 2000.07b
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    • pp.873-875
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    • 2000
  • The self- and mutual- winding inductances can have an important influence on both the steady-state and transient dynamic performance of a machine. Especially, slotless topologics have inherently low self- and mutual-stator winding inductance. Thus, this paper describes an analytical model for predicting the winding inductance and results are compared to finite element analyses.

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Dynamic Analysis of Rotor Eccentricity in Switched Reluctance Motor with Parallel Winding

  • Li, Jian;Choi, Da-Woon;Cho, Yun-Hyun
    • Proceedings of the KIPE Conference
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    • 2008.10a
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    • pp.85-87
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    • 2008
  • This paper presents dynamic characteristics in Switched Reluctance Motor (SRM) with rotor eccentricity and proposes the reduction method of rotor eccentricity effects by the different winding connections. These characteristics investigations are computed by 2D transient magnetic FEM analysis coupled with external circuits. The radial and unbalance magnetic force in the stator, which is the main exciting force of the vibration, is calculated using Maxwell stress method and compared with the performance characteristics according to the serial and parallel connections of windings. The influence of winding method counteracting unbalance forces on the rotor vibration behavior is estimated by the current waveforms of the paralleled paths under rotor eccentricity.

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A New Current Sharing Strategy of SRM Using Parallel Winding Method (병렬권선 방식에 의한 SRM의 부하전류분담)

  • 박성준;이동희;안진우;안영주
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.52 no.4
    • /
    • pp.154-154
    • /
    • 2003
  • The switched reluctance motor(SRM) has a considerable potential for industrial applications because of its high reliability as a result of the absence of rotor windings. In some applications with SRM, a parallel switching strategy is often used for cost saving, increasing of current capacity and system reliability. This paper proposes a new parallel switching strategy of SRM using parallel winding. While conventional parallel switching devices are connected in a phase winding, power devices are connected in the parallel windings wound in each pole of stator in the proposed method. Paralleling strategy for current sharing in the proposed method can be easily determined without considerations of any nonlinear characteristics of power devices such as conduction resistance, threshold voltage and gain factor. The proposed paralleling strategy is verified by the mathematical analysis and experimental results.