• Title, Summary, Keyword: switched reluctance motor

Search Result 657, Processing Time 0.055 seconds

Torque Estimation of Switched Reluctance Motor using Energy Conversion Method (에너지 변환법에 의한 스위치드 릴럭턴스 모터의 토오크 추정)

  • Kim, Youn-Hyun;Kim, Sol;Choi, Jae-Hak;Lee, Ju
    • The Transactions of the Korean Institute of Electrical Engineers B
    • /
    • v.50 no.8
    • /
    • pp.374-383
    • /
    • 2001
  • This paper presents the torque estimation scheme by Energy Conversion Method (ECM) that can be applied to the torque control of switched reluctance motor. There are two types of torque estimation method by ECM. One is the method using mechanical output energy and another is that using co-energy. When the torque is estimated by ECM, the estimated flux linkage can be obtained by voltage equation and Luenberger observer. By comparing the torque estimated by ECM with that be FEM, we verify the feasibility of the proposed torque estimation by ECM.

  • PDF

Torque Characteristics by the Inductance Profiles of a Switched Reluctance Motor (Switched Reluctance Motor에서 인덕턴스 프로필에 따른 토오크 특성)

  • Kong, Gwan-Sik;Park, Han-Woong;Ahn, Jin-Woo;Hwang, Young-Moon
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.597-599
    • /
    • 1992
  • A calculation method for predicting the instantaneous torques by the inductance profiles of a switched reluctance motor (SRM) is presented. The method considers saturation and nonlinearities in the magnetic circuits. The inductance of SRM varies complex according to the input current waveforms and rotor position angle, thus the accurate calculation technique is needed to estimate the inductance value at arbitary input current and rotor position angle. This paper describes how the inductance profiles influence the torque produced by the input current of SRM and, proposes a calculation technique of the permeabilities, reluctances, current waveforms and torques of a 6/4 3-phase SRM.

  • PDF

Speed Characteristics of Switched Reluctance Motor at High Speeds with Advance Angle Variation (고속회전을 위한 Switched Reluctance Motor의 Advance Angle 변화에 따른 특성해석)

  • Cho, K.Y.;Lim, J.Y.;Shin, D.J.;Kim, C.H.;Kim, J.C.
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.321-324
    • /
    • 1995
  • Switched reluctance motors and drives are increasingly used in high speed applications due to their robust mechanical structures, low inertia, and reduction in the rotor losses. The turn-on angle has to be advanced as the motor speed increases, but it may cause the starting problem in some rotor positions. In this paper, the characteristics of the maximum speed and input voltage with the advance angle at high speeds is investigated. To overcome the starting problem and reduce the torque ripple, conduction overlapping is added in adjacent phases. The effectiveness of conduction overlapping is verified through the simulation and experiments.

  • PDF

Optimal Switching Angle Control of a Switched Reluctance Motor: Maximization of Energy Conversion Ratio

  • Park, Sung-Jun;Lee, Sang-Hun;Ahn, Jin-Woo;Hong, Keum-Shik;Lee, Man-Hyung
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
    • /
    • v.11B no.4
    • /
    • pp.156-163
    • /
    • 2001
  • In this paper an optimal switching angle control of a switched reluctance motor (SRM) drive system is investigated for achieving maximum energy conversion ratio. A new magnetizing method is proposed with a low switching frequency. The proposed algorithm maximizes the positive energy conversion region, which is directly related to the mechanical output, and reduces the reactive power region with the same field energy region. As a consequence, a torque ripple is also sufficiently reduced compared with that of the conventional switching angle magnetizing method. Experimental results show that the proposed scheme provides a high efficiency and a low ripple drive.

  • PDF

Design and Characteristics Analysis of a Transverse Flux Type Switched Reluctance Motor (횡자속형 스위치드 리럭턴스 전동기의 설계 및 특성 해석)

  • Kim, Gyeong-Ho;Jo, Yun-Hyeon;Gu, Dae-Hyeon;Jeong, Yeon-Ho;Gang, Do-Hyeon
    • The Transactions of the Korean Institute of Electrical Engineers B
    • /
    • v.51 no.1
    • /
    • pp.7-15
    • /
    • 2002
  • The paper proposes the characteristics analysis for a Transverse flux type Switched Reluctance Motor(TSRM) considering the nonlinear magnetic phenomena. To investigate the nonlinear parameters of magnetic equivalent circuit, the designed TSRM is analyzed by the 2D and 3D finite element method as functions of input current and angular displacement. On the base of FEM analysis results, the current, torque, back EMF and output power wave of TSRM are simulated from the motion equation by MATLAB/Simulink. The simulated performance characteristics for a 4-phase, 24-pole TSRM are verified by experimental results of a prototype TSRM.

The Converter Topology with full Bridge Inverter for the Switched Reluctance Motor Drives (단상 풀 브리지 인버터를 이용한 SRM 컨버터 토폴로지)

  • Jang, Do-Hyeon
    • The Transactions of the Korean Institute of Electrical Engineers B
    • /
    • v.51 no.8
    • /
    • pp.475-481
    • /
    • 2002
  • In this paper the new converter topology using single-Phase full bridge inverter for the switched reluctance motor drives is proposed. The proposed SRM drives are supplied by the AC pulse voltage source, while the conventional drives are supplied by the DC voltage source. Speed of the SRM is controlled by adjusting the frequency and the multitude of output current of inverter. The SRM using the proposed converter reduces the switching loss and the machine core loss, and has ability to pre-regulate the input voltage. The total number of power switches become fewer than another topology as a number of stator poles becomes more. Power circuit of an inverter is simpler and its volume is smaller because the module device involving several switches is used as an inverter.

Sensitivity Analysis of Geometrical Parameters of a Switched Reluctance Motor with Modified Pole Shapes

  • Balaji, M.;Ramkumar, S.;Kamaraj, V.
    • Journal of Electrical Engineering and Technology
    • /
    • v.9 no.1
    • /
    • pp.136-142
    • /
    • 2014
  • A major problem in Switched Reluctance Motor (SRM) is torque ripple, which causes undesirable acoustic noise and vibration. This work focuses on reducing the undesirable torque ripple in SRM by modifying stator and rotor geometry. This paper presents a comparative study on torque ripple minimization in SRM with modified pole shapes such as stator pole taper, stator pole face with non-uniform air gap and pole shoe attached to rotor pole. Further this paper presents a detailed sensitivity analysis of the effect of different geometrical parameters that alter the pole face shapes on the performance of SRM. The analysis is performed using finite-element method considering average torque and torque ripple as performance parameters. Based on the analysis, a design combining stator pole taper with non-uniform air gap is proposed to improve the torque characteristics of SRM. The dynamic characteristics of the proposed design are simulated and the results show satisfactory reduction in torque ripple.

A Comparative Study of Operating Angle Optimization of Switched Reluctance Motor with Robust Speed Controller using PSO and GA

  • Prabhu, V. Vasan;Rajini, V.;Balaji, M.;Prabhu, V.
    • Journal of Electrical Engineering and Technology
    • /
    • v.10 no.2
    • /
    • pp.551-559
    • /
    • 2015
  • This paper's focus is in reducing the torque ripple and increasing the average torque by optimizing switching angles of 8/6 switched reluctance motor while implementing a robust speed controller in the outer loop. The mathematical model of the machine is developed and it is simulated using MATLAB/Simulink. An objective function and constraints are formulated and Optimum turn-on and turn-off angles are determined using Particle swarm optimization and Genetic Algorithm techniques. The novelty of this paper lies in implementing sliding mode speed controller with optimized angles. The results from both the optimization techniques are then compared with initial angles with one of them clearly being the better option. Speed response is compared with PID controller.

Design Using Finite Element Analysis of a Switched Reluctance Motor for Electric Vehicle

  • Ohyama Kazuhiro;Nashed Maged Naguib F.;Aso Kenichi;Fujii Hiroaki;Uehara Hitoshi
    • Journal of Power Electronics
    • /
    • v.6 no.2
    • /
    • pp.163-171
    • /
    • 2006
  • In this paper, a Switched Reluctance Motor (SRM) employed in an electric vehicle (EV) is designed using the finite element method (FEM). The static torque of the SRM is estimated through magnetic field analysis. The SRM temperature rise over operation time is estimated through heat transfer analysis. First, static torque and temperature rise over the time of 600W SRM is included in the experiment set, and are compared with the calculated results using the FEM under the same conditions. The validity of the magnetic field analysis and heat transfer analysis is verified by the comparisons. In addition, a 60 [kW] SRM employed in an EV, whose output characteristics are equal to a 1500 [cc] gasoline engine, is designed under magnetic field analysis and heat transfer analysis.

The Fundamental Characteristics of Novel Switched Reluctance Motor with Segment Core Embedded in Aluminum Rotor Block

  • Oyama Jun;Higuchi Tsuyoshi;Abe Takashi;Tanaka Keisuke
    • Journal of Electrical Engineering and Technology
    • /
    • v.1 no.1
    • /
    • pp.58-62
    • /
    • 2006
  • We proposed a novel segment type switched reluctance motor (SRM) in which the segment core was embedded in aluminum (conductive metal) rotor block in order to increase the mechanical strength and easy manufacturing as well as to improve the performance characteristics and reduce the vibration and acoustic noise. This paper explains the operation principle and the drive system and shows the experimental results in comparison with the VR type SRM.