• Title, Summary, Keyword: switched reluctance motor

Search Result 657, Processing Time 0.035 seconds

Development of a Switched Reluctance Motor-based Electric AC Compressor Drive for HEV/EV Applications

  • Kim, Jaehyuck;Jeong, Yong-Hoe;Jeon, Yong-Hee;Kang, Jun-Ho;Lee, Seunghun;Park, Jang-Yeop
    • Journal of Magnetics
    • /
    • v.19 no.3
    • /
    • pp.282-290
    • /
    • 2014
  • This paper discusses the development of a 3.5 kW switched reluctance motor (SRM)-based electric air-conditioning (AC) compressor, focusing primarily on the design aspects of the SRM and the integrated controller. In addition to the increased price of rare-earth magnets, SRM's operation capability at high speed and high temperature makes the SRM a viable alternative to the permanent magnet motor for electrically driven automotive air conditioning compressors. A compact and energy efficient scroll compressor is designed and constructed. Two feasible SRM topologies are considered, in terms of efficiency, torque ripple, and acoustic noise. Compact drive electronics are designed and employed to drive the SRM-based compressor. The static and dynamic performance is validated by simulation and experiment.

Design and Analysis of a Permanent-Magnet-Assisted Switched Reluctance Motor

  • Hwang, Hongsik;Hur, Jin;Lee, Cheewoo
    • Journal of Electrical Engineering and Technology
    • /
    • v.9 no.6
    • /
    • pp.2209-2217
    • /
    • 2014
  • A permanent-magnet-assisted switched reluctance motor (SRM) having small excitation poles, where phase coils are concentrically wound on the poles and thin permanent magnets are inserted inside the poles, is proposed in this paper. The insertion of permanent magnets into the stator excitation poles has a significant influence on positive torque improvement leading to a boost in efficiency. Three key design parameters such as the thickness of permanent magnets, space between two adjacent permanent magnets, and the width of stator excitation poles are determined during a design procedure in terms of the enhancement of positive torque. Step-by-step design modification and a comparison between the proposed permanent-magnet-assisted SRM and no-permanent-magnet SRM have been conducted by means of static torque comparison along with dynamic performance. The first prototype from steel laminations up to its physical assembly has been constructed.

Development of Switched Reluctance Motor Drive for Electric Power Steering System (전동식 조향장치용 스위치드 릴럭턴스 모터 드라이브 개발)

  • Jeong, Min-Chang;Joo, Min-Gi;Kim, Jaehyuck
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.63 no.11
    • /
    • pp.1511-1518
    • /
    • 2014
  • Demand for high fuel efficiency and smart features of the vehicles, research has been intensified. Hence, research and development on electric power steering (EPS) system to replace the existing hydraulic steering system has been actively conducted. Permanent magnet motors are widely used in automotive applications due to their high power density and high efficiency. However, increasing price and limited production of rare-earth permanent magnets has recently prompted the auto parts makers to substitute permanent magnet motors by non- or less rare earth magnet motors. Switched reluctance motors SRMs), known as typical non-rare earth motors have simple structure, low manufacturing cost, and high reliability. This paper discusses design, modeling, simulation, and experimental verification of a prototype SRM drive for electric power steering system.

Characteristics Analysis of Short Flux Path Switched Reluctance Motor

  • Ahn, Jin-Woo
    • Journal of international Conference on Electrical Machines and Systems
    • /
    • v.1 no.2
    • /
    • pp.38-45
    • /
    • 2012
  • A novel kind of switched reluctance motor (SRM) with short flux path is proposed in this paper. Phase excitation in the SRM gives short flux paths, hence reducing the magnetomotive force required to drive the machine, resulting in significant reduction of copper wire and core losses compared to the typical SRM with diametric circulation of magnetic flux. To verify the performance, the characteristics analysis of a double-stator SRM, a 6/5 SRM with C-core structure, and a 4/5 two-phase SRM, which all have short flux paths, and a comparison with conventional SR motors are executed. The comparison demonstrates that the proposed motor offers some advantages in terms of torque and efficiency.

Basic Design of Bearingless Switched Reluctance Motor with Hybrid Stator poles

  • Wang, Huijun;Liu, Jianfeng;Ahn, Jin-Woo
    • Journal of international Conference on Electrical Machines and Systems
    • /
    • v.1 no.3
    • /
    • pp.336-346
    • /
    • 2012
  • In this paper, a novel bearingless switched reluctance motor (BLSRM) with hybrid stator poles is proposed. The structure and operating principle are presented. In order to describe the design methodology clearly, analytical torque and radial force models are established. Further, basic design procedure is described. The numbers of phases and poles have important influence on the selection of structure. These effects, along with sizing of machine envelope and internal dimensions, make the machine design an insight-intensive effort. Effect of pole arcs and air-gap length on the production of torque and radial force are analyzed in detail. Mechanical design factors such as hoop stress and first critical speed are also considered. Based on the above analysis, the characteristics of the proposed BLSRM are analyzed. A prototype motor is designed and manufactured. The validity of the proposed structure is verified by the experimental results.

Inductance Calculation in a Switched Reluctance Motor using Permeance Method (퍼미언스 방법을 이용한 스위치드 릴럭턴스 전동기의 인덕턴스 산정)

  • Lee, Cheewoo
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.61 no.12
    • /
    • pp.1836-1842
    • /
    • 2012
  • Torque is proportional to the rate of change of inductance in a switched reluctance motor (SRM), and hence, phase inductance is an important parameter in determining the behavior of an SRM. Therefore, the accurate prediction of inductance with respect to rotor position makes a significant contribution to designing an SRM and its analytical approach is not straightforward due to nonlinear flux distribution. Although several different approaches using a finite element analysis (FEA) or curve-fitting tool have been employed to compute phase inductance [2-5], they are not suitable for a simple design procedure because the FEA necessitates a large amount of time in both modeling and solving with complexity for every motor design, and the curve-fitting requires the data of flux linkage from either an experimental test or an FEA simulation. In this paper, phase inductance is predicted by means of a permeance method, and the proposed approach is analytically verified in terms of the accuracy of estimated inductance compared to inductance obtained by FEA.

Torque Ripple Minimization Scheme Using Torque Sharing Function Based Fuzzy Logic Control for a Switched Reluctance Motor

  • Ro, Hak-Seung;Lee, Kyoung-Gu;Lee, June-Seok;Jeong, Hae-Gwang;Lee, Kyo-Beum
    • Journal of Electrical Engineering and Technology
    • /
    • v.10 no.1
    • /
    • pp.118-127
    • /
    • 2015
  • This paper presents an advanced torque ripple minimization method of a switched reluctance motor (SRM) using torque sharing function (TSF). Generally, TSF is applied into the torque control. However, the conventional TSF cannot follow the expected torque well because of the nonlinear characteristics of the SRM. Moreover, the tail current that is generated at a high speed motor drive makes unexpected torque ripples. The proposed method combined TSF with fuzzy logic control (FLC). The advantage of this method is that the torque can be controlled unity at any conditions. In addition, the controller can track the torque under the condition of the wrong TSF. The effectiveness of the proposed algorithm is verified by the simulations and experiments.

Design of a Switched Reluctance Motor Driving an Electric Compressor for HEVs (하이브리드 자동차(HEV) 용 전동식 컴프레서 구동을 위한 SRM 설계)

  • Jeong, Yong-Hoe;Jeon, Yong-Hee;Kang, Jun-Ho;Kim, Jaehyuck
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.62 no.5
    • /
    • pp.620-625
    • /
    • 2013
  • This paper presents the design of a switched reluctance motor (SRM) for electric air conditioning compressors which are applied to hybrid electric vehicles (EVs). The motor for driving air conditioning compressor which is recently used on EV(electric vehicle) / HEV (hybrid electric vehicle) is PMSM(permanent magnet synchronous motor) or BLDCM(brushless DC motor). However disadvantage of motors that uses permanent magnets are vulnerable to high temperatures because of the demagnetization by the high temperature and the permanent magnet is expensive because of the high price of rare earth materials from China's monopoly. Therefore, in the automotive insustry is interested in the non-rare-earth motors. SRM has many advantages. it's resistant to high temperatures, price is cheaper, because there are no permanent magnets and winding in the rotor. Also it's high relability and efficiency, suitable for high-speed operation because of structure is simple. In this paper, the SRM, non-rare-earth motor, are designed, analyzed and experimented drive to replace an existing electric compressor drive motor.

A Study on Rotor Position Detection and Securing Initial Position for Switched Reluctance Motor (SRM) (스위치드 릴럭턴스 전동기 (SRM) 회전자 위치 검출 및 초기 위치확보 연구)

  • Jeong, Sungin
    • The Journal of The Institute of Internet, Broadcasting and Communication
    • /
    • v.20 no.3
    • /
    • pp.141-146
    • /
    • 2020
  • In brushless DC motors (BLDC), the on/off angle of the switch is determined by the optimal alignment of the stator and rotor, while switched reluctance motors (SRM) are complex parameters with many on/off angles of the switch. It appears as a function and therefore the switching angle is variable for optimal operation. Therefore, in order to operate the switched reluctance motor (SRM) optimally, the rotor position can be detected using a high resolution position sensor and a complicated additional circuit. In this paper, rotor position detection and related position detection circuits are applied and detected by using various sensors such as encoder, hall sensor and opto interrupter among several methods to drive switched reluctance motor (SRM). Also a study on securing the initial position of the rotor was conducted.

Analysis of Output Characteristic in accordance with Airgap Variation in Switched Reluctance Motor and Brushless DC Motor (Switched Reluctance Motor와 Brushless DC Motor의 공극 변화에 따른 출력 특성 비교)

  • Yoon, C.H.;Park, K.K.;Lee, J.C.;Chun, Y.D.;Lee, Ju
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.843-845
    • /
    • 2001
  • In this paper, we analyze the characteristics of electecromotive force(emf), phase current and torque according to the length of the air gap using 2nd order FEM(Finite Element Method) in Synchronous Reluctance Motor(SRH) and Brushless DC Motor(BLDC) with same volume and size. In the analysis with FEM, we applied the time-step function considering the motor switch in the magnetic vector potential of the unknown node.

  • PDF