• Title, Summary, Keyword: switched reluctance motor

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Rotor Shape Design for Minimization Torque Ripple of Switched Reluctance Motor (SRM 토오크리플 저감을 위한 회전자 형상 설계)

  • Oh, Ju-Hwan;Kwon, Byoung-Il
    • Proceedings of the KIEE Conference
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    • pp.1291-1293
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    • 2005
  • Switched reluctance motors have the advantage a high torque/weight ratio, as the large reluctance torque is made by salient poles of both stator and rotor, and a high reliability. On the other hand, the switched reluctance motors have the disadvantage of a large ripple torque which is made by salient poles. So the application for the industrial fields have been limited to special cases. This paper describes the design of a 12/8 switched reluctance motor using a enemy layer method of the asymmetry rotor. The design is focussed to reduce the torque ripple and radial force in the demanded value. The three dimension finite element analysis method(3D-FEM) was used for decides a enemy layer angle of the asymmetry rotor. This paper presents modifications of the rotor pole shape which reduces the torque ripple.

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A Comparative Study of the Line Start Permanent Magnet, Skeleton Type Brushless DC, and Snail-earn Type Switched Reluctance Motor for Fans

  • Lee, Ji-Young;Lee, Geun-Ho;Hong, Jung-Pyo;Jin Hur
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.4B no.3
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    • pp.122-126
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    • 2004
  • The objective of this paper is to provide a comparison between the Line Start Permanent Magnet, Skeleton type Brushless DC, and the Snail-cam type Switched Reluctance Motor. These motors are compared under the same load characteristic as the cooling fan motor of a refrigerator. The comparison consists of speed, output power, efficiency, copper loss, and cost for three different motors. For the given application, the results provide an indication of the best machine suited with respect to performance and cost.

Design of 65kw Class Switched Reluctance Motor for HEV Drive (하이브리드 자동차 구동용 65kW급 SR Motor의 설계)

  • Moon Jae-Won;Ahn Jin-Woo
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.54 no.8
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    • pp.358-363
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    • 2005
  • This paper presents the reasonable design parameters of a switched reluctance motor to drive a hybrid electric vehicle by using the equivalent magnetic circuit method. The designed motor can be redesigned by using finite element analysis as a variation of the parameter for the purpose of improving performance. This paper shows that a flat-topped current of a phase can be made from a change of the lamination stack length for high average torque and a lower torque ripple. The change of current falling time as a variation of turn-off angle was shown by finite element analysis. The core loss and copper loss were described. The torque of the redesigned motor is suitable for low and high speed ranges to drive a HEV. which is verified by the speed-torque curve.

Design and Development of Low-Cost Switched Reluctance Motor Drive System (저가형 스위치드 릴럭턴스 모터 드라이브 시스템 개발)

  • Ha, Keun-Soo
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.58 no.11
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    • pp.2162-2167
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    • 2009
  • A Low cost and variable speed brushless motor drive system with single switch per phase is presented. The motor drive is realized with a novel two-phase flux-reversal-free switched reluctance motor and a split AC two switch converter. The strategy of the controller and the converter for its realization are described. Comparisons between a split AC converter, asymmetric converter, split DC converter, single controllable switch converter, and N+1 converter are performed for its device rating, cost, switching losses and conduction losses, and converter efficiency. The split AC converter is analyzed and simulated to verify the characteristics of the converter circuitry and control feasibility and the simulation results are presented. The efficiency with various loads is numerically estimated and experimentally compared from viewpoint of subsystem and system in details. The focus of this paper is to compare the presented motor drive system to the asymmetric converter system throughout experiments and demonstrate single switch per phase converter having comparable efficiency as the asymmetric converter system.

Design and Operation Characteristics of Novel 2-Phase 6/5 Switched Reluctance Motor

  • Hieu, Pham Trung;Lee, Dong-Hee;Ahn, Jin-Woo
    • Journal of Electrical Engineering and Technology
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    • v.9 no.6
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    • pp.2194-2200
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    • 2014
  • This paper presents a design of novel 2-phase 6/5 switched reluctance motor (SRM) for an air-blower application. This type of motor is suitable for the applications that require high speed and only one directional rotation as air-blower. The desired air-blower is unidirectional application, and requires a wide positive torque region without torque dead-zone. In order to get a wide positive torque region without torque dead-zone during phase commutation, asymmetric inductance characteristic with non-uniform air-gap is considered. The proposed motor can be operated at any rotor position. The proposed 6/5 SRM uses short flux path technique that achieved by means of winding configuration and lamination geometry. The purpose of short flux path is to reduce the core loss and the absorption MMF in the stator. The proposed 2-phase 6/5 SRM is verified by finite element method (FEM) analysis and Matlab-Simulink. In order to verify the design, a prototype of the proposed motor was manufactured for practical system.

Shape Design of Switched Reluctance Motor for 10kW type Pallect Truck (10KW급 지게차량용 스위치드 릴럭턴스 전동기의 형상 설계)

  • Lee, Jin-Woo;Woo, Kyung-Il;Kim, Hong-Seok;Kwon, Byung-Il
    • Proceedings of the KIEE Conference
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    • pp.55-57
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    • 2002
  • In industry, A pallet truck is drived mainly by d.c motor, because it use to battery for input power. However, d.c motor has a brush, this is the disadvantage of the d.c motor for a pallet truck. Though a brushless d.c motor has a permanent magnet, it is for low torque. Switched reluctance motors(SRM) have the advantage a high torque/weight ratio, as the large reluctance torque is made by salient poles of both start and rotor, and a high reliability, this paper design the shape of the switched reluctance motor that will replace a d.c motor for A pallet truck. First of all, designed parameter of SRM, outer diameter, diameter of rotor and stock length, from the outputr equation considering electric loading and magnetic loading. Next, design diameter of stator and rotor, depth of slot pole width, air gap as inner size of motor. The design of SRM certify the torque, the efficiency and the output power by a simulation.

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Optimal Shape Deign of a High Speed Switched Reluctance Motor Vsing Fuzzy Set Theory (퍼지 이론을 이용한 고속 회전용 스위치드 리럭턴스 모터의 형상 최적 설계)

  • Choi, Chang-Hwan;Yoo, Jae-Sun;Park, Kyi-Hwan
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.49 no.10
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    • pp.659-664
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    • 2000
  • This paper presents a new design method for improving the torque performance of a switched reluctance motor (SRM) for high speed applications. The drawback of the conventional design method based on the overall static average torque maximization is that the torque control performance is degraded at high speed. On the other hand, the proposed method optimizes the torque profile by diving it into several regions so that it is suitable for high speed operation. This multi-objective optimization problem is solved by using a fuzzy optimization algorithm which incorporates a finite element method. The torque performance of the motor for various speed ranges is investigated and the optimally designed motor show a better performance at high speed.

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Driving Performance of Switched Reluctance Motor Drive (Switched Reluctance Motor Drive 의 구동특성)

  • Oh, Suk-Gyu;An, Young-Joo;Choo, Young-Bae;Lee, Il-Chun;Hwang, Young-Moon
    • Proceedings of the KIEE Conference
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    • pp.604-606
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    • 1992
  • Many Industrial applications require high facultied and high efficiency motor drives. Recently, as such motor driving system, switched reluctance motor ( S R M ) drives are proposed. This paper describes the design features, drive circuits, and performance of 6/4 S R M for high efficiency variable speed drives. The main advantages of these motors lie In high efficiency, simple driving circuitry, and low manufacturing cost. The prototypes have been built and tested, showing satisfactory performance.

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Effect of Material Properties on Core Loss in Switched Reluctance Motor using Non-Oriented Electrical Steels

  • Kartigeyan, J.;Ramaswamy, M.
    • Journal of Magnetics
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    • v.22 no.1
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    • pp.93-99
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    • 2017
  • The effort attempts to investigate the influence of various non-oriented electrical steel sheets on the core loss of a switched reluctance motor (SRM). The core loss of the motor inherits a strong correlation with flux density and permeability of the material. The study involves the use of laminated 2.7 % high silicon steel suitable for the motor in view of its higher flux density and lower core loss. The accurate prediction of core loss leaves way to suggest measures for improving the performance of the SRM. The dynamic simulation measurements of a 1.5 kW, three-phase 12/8 SRM involve the finite element method (FEM) and use the data obtained experimentally from Epstein frame. The closeness of the simulated and hardware results obtained with laminations of M400-50A, DI MAX-M19 and DI MAX-M15 both for the stator and rotor, espouse a greater significance to the findings in terms of the core loss density and forge new dimensions for its use in the drive industry.

Single Phase Switched Reluctance Motor Optimum Design Using Response Surface Methodology and Finite Element Method (반응표면법과 유한요소법을 이용한 단상 스위치드 릴럭턴스 전동기의 최적 설계)

  • Lim, Seung-Bin;Choi, Jae-Hak;Park, Jae-Bum;Son, Yeoung-Gyu;Lee, Ju
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.55 no.12
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    • pp.596-607
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    • 2006
  • This paper presents Single Phase Switched Reluctance Motor (SPSRM) optimum design for vacuum cleaners using Response Surface Methodology (RSM) to determine geometric parameters, and the 2-D Finite Element Method (FEM) has been coupled with the circuit equations of the driving converter. Additionally, an optimum process for SPSRM has been proposed and peformed with geometric and electric parameters thereby influencing the inductance variation and effective torque generation as design variables. SPSRM performances have also been analyzed to determine an optimal design model for maximized efficiency at high power factor. In order to confirm the propriety of the Finite Element Method and motor performance calculation, simulation waveform and experiment waveform for motor voltage and current were compared.