• KIPE Magazine
• /
• v.22 no.2
• /
• pp.63-68
• /
• 2017

• The Transactions of the Korean Institute of Power Electronics
• /
• v.7 no.6
• /
• pp.537-545
• /
• 2002

This paper presents a new method of detecting rotor position in Toroidal Switched Reluctance Motor(TSRM). In this paper, low cost and robust characteristics of rotor position detection method are focused in order to compensate for disadvantage of existing sensors. Search coils wound around stator poles are used for detection of rotor position in TSRM. Rotor position detection is achieved through electromotive force patterns induced by time-varying flux linkage in the search coils and then adequate phase is excited for drive. The validity of the method is verified by experimental results.

• The Transactions of the Korean Institute of Electrical Engineers B
• /
• v.54 no.1
• /
• pp.1-8
• /
• 2005

This paper presents a characteristic analysis of switched reluctance motor (SRM) considering switching control method and DC link voltage ripple by using time-stepped voltage source finite element method in which the magnetic field is combined with drive circuit. We also examine the influence of freewheeling diodes and DC link voltage ripple on the performance of the SRM such as torque ripples and radial force on the surface of the teeth. The freewheeling diodes and DC link voltage ripples must be taken into account to predict the performance of SRM.

• The Transactions of the Korean Institute of Power Electronics
• /
• v.3 no.1
• /
• pp.46-52
• /
• 1998

This paper describes a current-shaping method for the production of constant torque of SRM under the nonlinear magnetic saturation condition. A current detection technique in the inductance increasing region and an approximation technique for modeling of nonlinear inductance profile are adopted. In the proposed system, a single switching angle control and voltage control is used to shape the current waveform for the generation of flat torque at any given load condition. Finally the validity of the proposed method was verified using a constructed 3HP 6/4 SRM.

• Proceedings of the KIPE Conference
• /
• 2013.07a
• /
• pp.94-95
• /
• 2013

본 논문은 전류 패턴을 이용한 스위치드 릴럭턴스 모터의 스위칭 소자 고장진단 방법을 제안한다. 측정된 4상 전류($i_a$, $i_b$, $i_c$, $i_d$)는 정지 좌표계 전류로 변환되고 이를 정지 좌표계에 나타내면 스위칭 소자의 고장에 따른 특정한 형태를 갖는 전류 벡터의 패턴을 얻을 수 있다. 제안한 기법을 통해 스위칭 소자의 개방 및 단락 고장을 진단 가능하다. 제안된 기법은 기존의 기법들과는 달리 추가적인 전류센서나 전압센서가 필요하지 않고, 시스템 모델링이 필요하지 않아 비용적인 측면과 복잡한 계산이 필요하지 않은 장점이 있다. 본 논문에서는 시뮬레이션 결과를 통해 제안된 기법의 타당성 및 성능을 검증한다.

• The Transactions of the Korean Institute of Power Electronics
• /
• v.2 no.3
• /
• pp.11-19
• /
• 1997

본 논문에서는 스위치드 리럭턴스 전동기의 토크 리플 또는 소음을 감소하기 위한 방법으로써 순시 전압제어방식을 제시하였다. 이 방식은 상 정류의 제곱의 합ㅇ르 제어하여 토크 리플을 제거할 수 있다. 제안방식에 대해 해석하였으며, 이 방식의 이론적인 타당성을 입증시키기 위해 소프트웨어 페키지 ASCL에 의해 시뮬레이션하였다. 실험에 의해 SRM 토크 리플의 제거를 확인하였다.

• Proceedings of the KIEE Conference
• /
• 2008.11b
• /
• pp.95-97
• /
• 2008

The binary observer estimates the rotor position and rotor flux with alleviation of the high-frequency chattering, and retains the benefits achieved in the conventional sliding observer, such as robustness to parameter and disturbance variations. The position sensorless control of SRM under the load and inductance variation is verified by the experimental results.

• The Transactions of the Korean Institute of Power Electronics
• /
• v.8 no.4
• /
• pp.344-350
• /
• 2003

In this paper, an estimation technique of initial rotor position at standstill in Switched Reluctance Motor(SRM) is proposed. In case search coils are used as a position sensor, it has many advantages like low cost, decrease in the volume, high robust characteristics and wide applications. However, the initial rotor position detection is very difficult because the search coil's EMF is not exist at a standstill. In this paper, a near estimation method of initial rotor position is suggested using squared Euclidean distance. The simulation and experiment for the proposed method are achieved. The validity of the proposed method is verified by experimental results.

• Journal of Advanced Marine Engineering and Technology
• /
• v.40 no.4
• /
• pp.348-352
• /
• 2016

This paper addresses the efficient improvement of the Switched Reluctance Motor(SRM) by the proper voltage excitation. In the case of loads with large operational motor-speed differences such as washing machine, an SRM system driven by a constant DC-link voltage is not useful for improving the efficiency. To reduce the effect of the excess DC-link voltage, AC-DC control converter that uses a silicon controlled rectifier instead of diode rectifier is employed in the SRM driver system. AC-DC control converter supplies a proper link voltage for low-speed operation. The experimental results demonstrated that the efficiency of the system was improved at low speeds.

• The Transactions of the Korean Institute of Power Electronics
• /
• v.9 no.1
• /
• pp.25-29
• /
• 2004

This paper is to research about design and drive system of a switched reluctance motor for a pallet truck application. SRM is suitable for a pulse type source and is researched for home and industrial applications owing to the advance of power electronics technology. An SRM for a pallet truck drive is developed and tested. The drive system has to operate with low voltage and high current. The small size, robustness and high efficiency make it possible to replace with DC motor which is used in a pallet truck conventionally. Test results show that pallet truck with SRM has better drive characteristics than that of the DC motor performance.