• 제목/요약/키워드: Switched reluctance motor

검색결과 651건 처리시간 0.152초

쵸핑없는 여자를 사용한 스윗치드 리럭탄스 전동기의 최적운전에 관한 연구 (Optimal Operation of a Switched Reluctance Motor using Choppingless Excitating)

  • Kwon, Young-Ahn
    • 대한전기학회논문지
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    • v.43 no.5
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    • pp.747-752
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    • 1994
  • The switched reluctance motor has high efficiency over a wide range of speed and torque. However the switched reluctance motor exhibit comparatively low efficiency in the chopped excitation which produces additional inverter losses. This paper examines the optimal efficiency operation using choppingless excitation under the changed supply voltage. The excitation is designed to produce the required torque and speed satisfying the optimal efficiency in a nonlinear switched reluctance motor. The optimal algorithm is applied to 119 operation points which are chosen over the full range of driving torque and speed. The result in this paper indicate the improved efficiency comparing to the efficiency obtained by both switched and chopped excitataions under a fixed supply voltage.

Switched Reluctance Motor의 스위칭각 조정에 의한 가변속 구동특성 (Variable speed drive of a Switched Reluctance Motor by adjusting switching angles)

  • 황종규;공관식;황영문
    • 대한전기학회:학술대회논문집
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    • pp.1026-1029
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    • 1993
  • Inherent speed-torque performance of Switched Reluctance Motor is similar to that of series wound DC motor. Thus, the speed of the motor is extremely regulated according to load torque. For the purpose of controlling the speed and torque of SRM it is necessary to change the applied DC link voltage or the switch-ON and switch-OFF angles which control the phase current of the motor. This paper describes speed-torque characteristics of an integral horse power Switched Reluctance Motor by adjusting the switch-ON and switch-OFF angles. Speed at rated load torque can be regulated by adjusting the switching angles and the control scheme is applied to 2kW, 3 phase, 6/4 SRM.

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상전류 변화를 이용한 Switched Reluctance Motor의 Sensorless 구동회로 (Sensorless Drive Circuit of a Switched Reluctance Motor using the Variation of Phase Currents)

  • 임준영;조관열;신두진;김창현;김정철
    • 대한전기학회:학술대회논문집
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    • pp.315-317
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    • 1995
  • A simple drive circuit without position sensors for a switched reluctance motor is presented. The turn on and turn off points are determined by detecting the rate of change of the active phase current. The drive circuit consists of a current sensing resistor, RC filter, comparator, OP Amp, and OR gates. It is verified through the experiments that the switched reluctance motor with the proposed sensorless drive circuit is well operated in wide speed ranges.

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직선형 스위치드 릴럭턴스 전동기의 전자기 특성을 고려한 동특성 해석 (Dynamic Analysis of Linear Switched Reluctance Motor considering Electromagnetic Characteristics)

  • 장석명;박지훈;고경진;김일중
    • 대한전기학회:학술대회논문집
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    • pp.611_612
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    • 2009
  • This paper deals with dynamic analysis of linear switched reluctance motor considering electromagnetic characteristics. First, inductance profile of linear switched reluctance motor calculate at align and unalign position and phase resistance using analytical method. Analytical method of this paper used space harmonics method, also, analysis result compares with data that is derived through an finite element method, and proved validity. In dynamic simulation of linear switched reluctance, we analyzed dynamic characteristic of linear switched reluctance motor according to single pulse waveform and hard chopping voltage PWM.

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

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

  • 최용권;윤희성;고창섭
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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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.

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
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    • v.11B no.4
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    • pp.156-163
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    • 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.

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Multi-Object Optimization of the Switched Reluctance Motor

  • Choi, Jae-Hak;Kim, Sol;Kim, Yong-Su;Lee, Sang-Don;Lee, Ju
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.4B no.4
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    • pp.184-189
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    • 2004
  • In this paper, multi-object optimization based on a progressive quadratic response surface method (PQRSM) and a time stepping finite element method (FEM) is proposed. The new PQRSM and FEM are able to decide optimal geometric and electric variables of the switched reluctance motor (SRM) with two objective functions: torque ripple minimization and average torque maximization. The result of the optimum design for SRM demonstrates improved performance of the motor and enhanced relationship between torque ripple and average torque.

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
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    • v.10 no.1
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    • pp.118-127
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    • 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.