• Title, Summary, Keyword: switched reluctance motor

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Characteristic Analysis of C-dump Converter Topology for SRM of Electric Multiple Unit Door Driving (전동차 출입문 구동을 위한 SRM용 C-dump 컨버터 Topology 특성 비교)

  • Yoon, Yong-Ho
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.9
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    • pp.1597-1604
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    • 2016
  • The speed at which the SRM (Switched Reluctance Motor) makes a transition from chopping control to single pulse operation. (i.e., low speed to high speed operation). It is unsatisfied with performance at all operational regimes. In this paper, the operational performance of SRM can be improved by using current hysteresis control method. This method maintains a generally flat current waveform. At the high speed, the current chopping capability is lost due to the development of the back-EMF. Therefore SRM operates in single pulse mode. By using zero-current switching and zero-voltage switching technique, the stress of power switches can be reduce in chopping mode. When the commutation from one phase winding to another phase winding, the current can be zero as fast as possible in this period because several times negative voltage of DC-source voltage produce in phase winding. This paper is compared to performance based on energy efficient C-dump converter topology and the proposed resonant C-dump converter topology. Simulation and experimental results are presented to verify the effectiveness of the proposed circuit.

Pressure Control of Hydraulic Pump using SR Drive with Pressure Predict and Direct Torque Control Method (압력예측기법과 직접순시토크제어기법을 통한 유압펌프용 SRM의 압력제어구동)

  • Lee, Dong-Hee;Seok, Seung-Hun;Liang, Jianing;Ahn, Jin-Woo
    • The Transactions of the Korean Institute of Power Electronics
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    • v.13 no.3
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    • pp.171-178
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    • 2008
  • Pressure control of hydraulic pump using SRM with pressure predictor and direct torque control method is presented in this paper. Nowadays, high efficiency and high performance motor drive is much interested in hydraulic pump system. But the hydraulic pump system has an inherent defect that its dynamic behavior causes by interaction between the sensor and hydraulic load. It will make low performance of whole system, even unstable and oscillatory. Proposed system integrates pressure predictor and direct instantaneous torque control (DITC). The pressure predictor includes Smith predictor, which is easy to improve unstable or long oscillation in traditional negative feedback control and popular PID control architectures. And DITC method can reduce inherent torque ripple of SRM, and develop smooth torque to load, which can increase stability and improve the torque response of SR drive. So high dynamic performance and stabilization can achieved proposed hydraulic system. At last, the proposed hydraulic system is verified by simulation and experimental results.

Position Sensorless Cotrol of SRM using Evolutionary Sliding (진화 슬라이딩 모드 관측기를 사용한 SRM의 위치 센서리스 제어)

  • 박진현;박한웅;최영규
    • Journal of Korean Institute of Intelligent Systems
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    • v.11 no.6
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    • pp.516-523
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    • 2001
  • This paper introduces a indirect rotor position and speed estimation algorithm for the SRM(switched reluctance motor) sensorless control based on the sliding mode observer and evolutionary programming The information of position and speed is generally provided by encoder or resolve. However, the position sensor not only adds complexity, cost and size to the whole drive system, but also causes limitation for industrial applications. In this paper, in order to eliminate the position sensor, indirect position sensing, indirect position sensing method using sliding mode observer is used for SRM drives. But if sliding mode observer parameters are selected to be large, the corresponding rapid changes of estimated position and velocity result in chattering phenomenon. Therefore in order to reduce the chattering, this observer parameters are optimized by evolutionary programming. And PID controller is also optimized to track precisely for the SRM using evolutionary programming.

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Finite Element Modeling Method for SRM Design (SRM 설계를 위한 유한 요소 모델링 기법)

  • Bae, Jae-Nam;Lee, Sung-Gul;Kim, Won-Ho
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.19 no.4
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    • pp.586-592
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    • 2018
  • SRMs are difficult to design using a simple mathematical model and, consequently, numerical analysis based characteristics analysis is used including drive circuits. In this process, it is necessary to analyze the trends according to the change of the design factors, however, many of the design factors affect each other. In order to shorten the design time and achieve a proper design, a modeling technique based on the design parameters is needed. For this purpose, this paper summarizes the formulas employed for shape modeling by minimizing the number of major design factors of the SRM, and proposes a methodology for SRM design using these formulas. In particular, we propose a design method for a 6/4-pole model, one which has been studied for a long time, and showed an example of a design produced by the proposed method.

Performance Analysis of Single-phase SRM Drive System with Single-stage Power Factor Correction (1단구조방식의 PFC회로를 갖는 단상 SRM 구동시스템의 특성해석)

  • Lee, Dong-Hee;Lee, Jin-Kuk;An, Young-Ju;Ahn, Jin-Woo
    • The Transactions of the Korean Institute of Power Electronics
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    • v.11 no.4
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    • pp.328-339
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    • 2006
  • In this paper the characteristic analysis of a single-phase switched reluctance motor (SRM) drive system with power factor correction (PFC) circuit is presented. The SRM is a low cost, simple and has a good high speed performance. The SRM drive with diode rectifier and filter capacitor has a low power factor because of short switch on time of capacitor. A novel switching topologic is presented to improve power factor and reduce torque ripple based on analysis of PFC circuit. Accordingly the SRM drive system with PFC circuit is also presented. Through the numerical analysis of the system, the toque ripple, power factor and efficiency with the change of rotary speed, load torque and capacity of the capacitor are achieved and compared with actual measured value.

Maximum Torque Operation of SRM by using a Self-tuning Control Method (SRM의 최대 토크 운전을 위한 자기동조 제어)

  • 서종윤;김광헌;장도현
    • The Transactions of the Korean Institute of Power Electronics
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    • v.9 no.3
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    • pp.240-245
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    • 2004
  • This paper presents a Switched Reluctance Motor(SRM) drive using the self-tuning control method to achieve the maximum torque. SRM has the difficulty to research it by an analytic method and to control the speed End torque because of the high nonlinearity. So, in this paper, the self-tuning control method is applied to relevantly controlling turn-on/off angle to operate at the maximum torque. Also, the feedback signals to control the turn-on/off angle are the encoder pulse and the increment of phase current. At first, n adequate turn-off angle is searched by itself and then a turn-on angle is done. As the relationship between turn-on and him-off angle is mutual dependent, the turn-on/off angle is controlled by a real time self-tuning control method in order to maintain the maximum torque. The proposed self-tuning Algorithm is verified by experiments.