• Title, Summary, Keyword: switched reluctance motor

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Control of SRM with Modified C-dump Converter in Cooling System of Automobiles (Modified C-dump 컨버터를 이용한 자동차 냉각시스템 SRM 제어)

  • Yoon, Yong-Ho
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.66 no.8
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    • pp.1297-1302
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    • 2017
  • Recently, SRMs are used in automobiles for power assistant steering, accessory motion control and traction drives. Especially in the motion control and traction drives, safety and efficiency are of paramount importance. The paper describes the essential elements faced in designing and constructing driving circuits for a switched reluctance motor for automobiles. An important factor in the selection of a motor and a drive for industrial application is the cost. The switched reluctance motor(SRM) is a simple, low-cost, and robust motor suitable for variable-speed as well as servo-type applications. With relatively simple converter and control requirements, the SRM is gaining an increasing attention in the drive industry. This paper presents a modified C-dump converter for Switched Reluctance Motor (SRM) machine application in the cooling system of automobiles. The experiments are performed to verify the capability of applicate control method on 6/4 salient type SRM.

Characteristic Analysis and Design of Switched Reluctance Motor for the Improved 2-phase Snail-earn Type Fan Motor

  • Lee, Ji-Young;Lee, Geun-Ho;Hong, Jung-Pyo
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.4B no.1
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    • pp.1-5
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    • 2004
  • This paper deals with the design and analysis of a 2-phase Switched Reluctance Motor (SRM) used for the cooling fan motor of a refrigerator. To reduce the dead zone and improve the efficiency, the snail-earn type rotor pole and the asymmetric stator pole are investigated. For the optimal shape design, the performances of each model are obtained from numerical calculation results by 2D time-stepping finite element method (FEM) coupled with circuit equations. The accuracy of analysis is verified by comparing the analysis results with experimental data. According to the investigation results, improved shapes of stator and rotor poles are proposed.

Performance of Passive Boost Switched Reluctance Converter for Single-phase Switched Reluctance Motor

  • Ahn, Jin-Woo;Lee, Dong-Hee
    • Journal of Electrical Engineering and Technology
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    • v.6 no.4
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    • pp.505-512
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    • 2011
  • A novel passive boost power converter forsingle-phaseswitched reluctance motor is presented. A simple passive circuit is proposed comprisingthree diodes and one capacitor. The passive circuitis added in the front-end of a conventional asymmetric converter to obtain high negative bias. Based on this passive network, the terminal voltage of the converter side is a general DC-link voltage level in parallel mode up to a double DC-link voltage level in series mode. Thus,it can suppress the negative torque generation from the tail current and improve the output power. The results of the comparative simulation and experiments forthe conventional and proposed converter verify the performance of the proposed converter.

Analysis of the Switched Reluctance motor Characteristics Considering Magnetic Nolinearity (자기적 비선형을 고려한 스위치드 리럭턴스 모터의 특성 해석)

  • 천동진
    • Proceedings of the KIPE Conference
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    • pp.517-520
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    • 2000
  • This paper presents models considering the magnetic nonlinear characteristics of 8/6 Switched Reluctance Motor. A $\lambda$-i equation with Fourier series parameters is shown to represent the relating to flux-linkage and current appropriately at any rotor position. And the energy conversion loop is described.

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Drive Circuit for Switched Reluctance Motor with Flyback Transformer (Flyback Transformer를 갖는 Switched Reluctance Motor의 구동회로)

  • Lim, J.Y.;Cho, K.Y.;Baik, I.C.;Shin, D.J.;Kim, J.C.
    • Proceedings of the KIEE Conference
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    • pp.833-836
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    • 1993
  • A flyback type power converter circuit for switched reluctance motor drives is presented. In this converter circuit, the energy extracted from an off going phase is stored in an additional capacitor. The energy stored is used to either be returned to the source frequently or energize the conducting phase during the conduction interval through the transformer. The additional switch to pass the energy stored in the capacitor to the source or the conducting phase is switched under a relatively low voltage condition. Its switching frequency is relatively high so that the size of the transformer can be reduced. The design guideline for the capacitor and the transformer is described. The effectiveness of the presented converter circuit is compared to other circuits through the analysis and experiment.

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A Driving Algorithm for a Switched Reluctance type Contact-Free Linear Stage (Switched Reluctance 형 비접촉 선형 스테이지를 위한 구동 알고리즘)

  • Lee Sang-Heon
    • Journal of the Korean Society for Precision Engineering
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    • v.23 no.5
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    • pp.85-92
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    • 2006
  • Recently in the field of precision positioning device, the contact-free stages are gaining focuses with their outstanding performances by eliminating mechanical frictions. This paper presents the driving algorithm for contact-free linear stage based on switched reluctance principle. The proposed driving algorithm has a similar structure of that of switched reluctance motor but this study has its own originality in terms of reducing the normal farces and force ripple at the same time. The simulation and experiment are executed to verify the proposed algorithm.

Shape Optimization of a Switched Reluctance Motor Having 6/4 Pole Structure for the Reduction of Torque Ripple Using Response Surface Methodology (반응표면법을 이용한 6/4극 구조를 갖는 스위치드 릴럭턴스 모터의 토크 리플 저감을 위한 형상 최적설계)

  • Choi, Yong-Kwon;Yoon, Hee-Sung;Koh, Chang-Seop
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.55 no.12
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    • pp.608-616
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    • 2006
  • Recently, a switched reluctance motor is widely used in various industries because it has many advantages such as a simple structure, robustness, less maintenance, high torque/weight ratio, and easy speed control over other types of motors. However, a switched reluctance motor inherently produces acoustic noise and vibration caused by torque ripple. Applications of these motors where silent operation is desirable have thus been limited. In this paper, a new stator pole face having a non-uniform air-gap and a pole shoe attached to the lateral face of the rotor pole are suggested in order to minimize torque ripple. The effects of each design parameter are validated using a time-stepping finite element method. The parameters are optimized by utilizing response surface method (RSM) combined with (1+1) evolution strategy. The result shows that the optimized shape gives higher average torque and drastically reduced torque ripple.

Electromagnetic and Vibration Analysis of E-core Switched Reluctance Motor with Permanent Magnets and Auxiliary Windings

  • Saranya, S.;Balaji, M.
    • Journal of Power Electronics
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    • v.19 no.2
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    • pp.540-548
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    • 2019
  • In this work a new configuration of E-core stator Switched Reluctance Motor (SRM) with permanent magnets and auxiliary windings embedded in the stator yoke is proposed. For the proposed configuration of SRM electromagnetic analysis is performed using Finite Element Analysis (FEA) based computer aided design package MagNet and to emphasize its merits a comparison is drawn with existing hybrid excitation configuration of SRM. In addition, the vibration characteristics of the motor are analyzed by performing modal and transient analysis using the ANSYS package. Results of the analysis reveals that the proposed configuration of SRM exhibits better electromagnetic and vibration characteristics and is capable of competing with the existing topologies in the variable speed market.

Simulation of a Switched Reluctance Motors Using Matlab/M-file (Matlab/M-file을 사용한 Switched Reluctance Motor의 시뮬레이션)

  • Kim Chong-Chul;Hyun Dong-Seok
    • Proceedings of the KIPE Conference
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    • pp.423-426
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    • 2002
  • This paper presents a new analytical representation and simulation of the phase inductance of a Switched Reluctance Motor(SRM) using Matlab/M-file. This simulation method has many advantages: it is free from expression, can be applied widely, demonstrates inductance profile using motor parameter only, and save run time. Moreover, this simulation method can be easily realize various SRM model unlikely the existing method that limited itself to one model. And analytical expression for inductance profile is welcome as it allows for easier analysis of the motor, for it can bring insight in it working, in formulating control strategies and in achieving high accuracy in performance computations.

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Influence of Stator Structure on Vibration of Switched Reluctance Motor

  • Ha, Kyung-Ho;Kim, Young-Kyoun;Lee, Geun-Ho;Hong, Jung-Pyo
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.2B no.3
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    • pp.95-99
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    • 2002
  • This paper deals with the influence of the various stator structures in a Switched Reluctance Motor (SRM) on the vibration behaviors. The stator part in SRMs produces most vibrations. Therefore, the geometric design of the stator is necessary to reduce the vibration. The free and forced vibrations for four different stator yoke structures are analyzed by the electromagnetic and structural Finite Element Method (FEM). Then vibration stator structure that offers less is proposed. The modal analysis results of a tested motor are compared with measurements.