• Title/Summary/Keyword: winding

Search Result 2,086, Processing Time 0.026 seconds

Analytic Results for the Double Short Turn Sensor Structure of Rotor Winding in Generators (발전기 회전자권선 단락센서의 이중화구조 실험결과 분석)

  • Lee, Young-Jun;Ju, Young-Ho
    • Proceedings of the KIEE Conference
    • /
    • 2008.07a
    • /
    • pp.2054-2055
    • /
    • 2008
  • Due to the severe operation environment, the accidents in the rotor winding increase lately. To prevent the rotor's damage from short turn phenomena, research staffs in Korea Electric Power Research Institute develop sensors to detect short turn efficiently. In this paper, we present the double-structured short turn sensor which evluates the healthiness of rotor winding.

  • PDF

Driving Characteristics of SRM with an Auxiliary Fully Pitched Winding

  • Jung, Tae-Uk;Oh, Seok-Gyu;Ahn, Jin-Woo;Hwang, Young-Moon
    • Proceedings of the KIPE Conference
    • /
    • 1998.10a
    • /
    • pp.763-767
    • /
    • 1998
  • In this paper, we analyzed the characteristics and source of vibration and acoustic noise in SRM drives. The paper study the reduction technique of those by new SRM which has auxiliary field winding. The operating mechanism and vibration and acoustic noise characteristics is examined. This paper suggests the control strategies of auxiliary field winding in order to reduce vibration and acoustic noise.

  • PDF

On The Dynamics And The Demagnetization Effect Of The Amplidyne Generator With Auxiliary Feedback Compensating Winding (상태변수에 의한 회전형전자증폭기의 동특성 해석 및 감자작용효과에 관한 연구)

  • Se Hoon Chang
    • 전기의세계
    • /
    • v.21 no.6
    • /
    • pp.9-16
    • /
    • 1972
  • This work intends to study the machine dynamics in the state-space approah and to formulate the operating characteristics of a namplidyne generator, with balanced control field winding and an auxiliary feedback winding for compensating purpose. In the derivation of the dynamic equation, investigations on the demagnetization effects are accentuated, based on the magnetic interlinks between windings of the machine. From the machine dynamic relation obtained, a state-variable representation of the machine dynamics is approached in the first part of this work.

  • PDF

Power Loss Calculation of High Frequency Transformers

  • Choi Geun-Soo;Yoon Shin-Yong;Baek Soo-Hyun;Kim Yong
    • Journal of Electrical Engineering and Technology
    • /
    • v.1 no.3
    • /
    • pp.338-342
    • /
    • 2006
  • This paper analyzed the power loss of transformers considering the magnetic component. For this, each winding strategy and the effect of air gap between the ferrite core have been an important variable for optimal parameter calculation. Inductors are very well known design rules to devise, but the performance of the flyback converter as a function of transformer winding strategy has not been fully developed. The transformer analysis tool used was PExpert. The influence of the insulator thickness, effect of the air gap, how the window height and variation of the capacitive value effects the coil and insulator materials are some of parameters that have been analyzed in this work. The parameter analysis is calculated to a high frequency of 48[kHz]. Therefore, the final goal of this paper was to calculate and adjust the parameters according to the method of winding array and air gap minimizing the power loss.

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
    • /
    • v.3 no.2
    • /
    • pp.139-147
    • /
    • 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.

Study of Various Winding Topologies for Self-Shielding Induction Cookers

  • Auvigne, Christophe;Copt, Florian;Winter, Christophe;Perriard, Yves
    • Journal of international Conference on Electrical Machines and Systems
    • /
    • v.2 no.4
    • /
    • pp.375-379
    • /
    • 2013
  • In this paper, the magnetic coupling between an induction cooker and a metallic pot is studied for various winding topologies. Effects of the winding orientation on the power transfer capability and on the emitted magnetic field under the cooker are discussed and compared. A novel topology inspired by permanent magnet Halbach array is proposed. This consists in coupling in both horizontal and vertical directions and to create an asymmetric field in order to reduce the emission under the cooker.

Characteristics of Two Phase Operation of Two Winding Motor Driven by Reference Current Adaptive Inverter (기준전류추정형 인버어터에 의한 2 권선전동기의 2 상운전특성)

  • 원종수;정의상
    • The Transactions of the Korean Institute of Electrical Engineers
    • /
    • v.33 no.8
    • /
    • pp.289-298
    • /
    • 1984
  • The single phase induction motor is recently requested to meet a broad speed control and smooth forward and reverse operation due to the multifarious usages. This paper deals with two phase operation of a two winding motor by reference current adaptive inverter which can supply the currents to satisfy the balanced oeration into the main and auxiliary winding through the entire operational region. According to the roposed system, the starting, forward and reverse and variable speed control of a two winding motor eliminated the capacitor from the capacitor-run motor is also possible. The formation and its principle of the reference current adaptive inverter and characteristic analysis of the motor fed by this apparatus are described in this paper. Excellent agreement with the measured results and calculated values by computer simulation is obtained.

  • PDF

A Study on the Adapting for Interrupting Capacity Augmentation of Circuit Breaker (차단기의 차단합성성대기적에 관한 연구)

  • 황석영;조무제
    • The Transactions of the Korean Institute of Electrical Engineers
    • /
    • v.33 no.8
    • /
    • pp.299-309
    • /
    • 1984
  • This paper proposes the adapter for interrupting capacity augmentation of circuit breaker which can be applied in case of shortage in a existing circuit breaker's interrupting capacity due to utility system extension. The adapter utilizes two winding type of reactor instead of single winding type of reactor and the control of 2ry circuit is excuted by a triac interlocked with the system protective relays actuation so as to cut out the reactor by short circuit of the 2ry winding in normal situation and to cut in the reactor by open circuit of the 2ry winding in abnomal situation such as short circuit accident. As a result of the theoritical analysis and experiment, it is proved that the adaptor can reduce the voltage crop and iron loss due to the reactor signigicantly in normal system condition and do a role of reactor upon the power system accident.

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
    • /
    • 1996.07a
    • /
    • pp.121-123
    • /
    • 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.

  • PDF

A Study on Stress Analysis for Design of Composites Shaft on Small Ship by Filament Winding Process (필라멘트 와인딩 공법에 의한 소형 선박용 복합재료 축 설계를 위한 응력해석에 관한 연구)

  • 배창원;임철문;왕지석;김윤해
    • Journal of Advanced Marine Engineering and Technology
    • /
    • v.25 no.3
    • /
    • pp.617-622
    • /
    • 2001
  • The purpose of this study is to design and the analyze the stress of composited shaft which is wound by filament winding method. The composites shaft has high strength and reduction in weight compared to metal shaft. The classical laminate plate theory(CLT) was used fro analysis the stress, and for structure design. In order to replace metal shaft by composites shaft, the diameter of shaft was determined to $\phi$ 40. The ration of diameter was determined to 0.4 for torsional moment with CLT. In this result of analyzing the stress, composites shaft was safe $30^{\circ}~60^{\circ}$C of winding angle, and was fractured on $90^{\circ}$.

  • PDF