• Journal of international Conference on Electrical Machines and Systems
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• 제1권3호
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• pp.347-353
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• 2012

Design and analysis of a novel 2-phase 4/5 Switched Reluctance Motor(SRM) is presented. The proposed motor employs a novel stator pole configuration. A novel SRM employs four-rotor and five-stator poles. The motor has no dead-zone and can be operate at any rotor position. The structure and operating principle are also described. The comparison between the proposed motor and a conventional two-phase 4/2 SRM is undertaken in this analysis. Furthermore, the Finite Element Analysis(FEA) and matlab-simulink are used to predict and simulate the performance of a proposed motor. The results of investigation indicate that the proposed structure offers a better performance in term of torque production.

• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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• 제4B권1호
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• pp.6-11
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• 2004

The single phase switched reluctance motor (SRM) has many merits; simple structure and driving circuits, easy operation and speed control, and etc. This paper presents the torque characteristics of disk type single phase SRM by changing the salient pole lengths and pole arcs. The prototype single phase SRM has a three dimensional magnetic flux pattern because of its structure. That is, the radial and axial magnetic flux contributes to torque generation. Thus, 3D analysis is required for computation of its magnetic field. In this paper, 3D FEM is used for analyzing the magnetic flux distribution and magnetic co-energy.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2004년도 전력전자학술대회 논문집(1)
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• pp.182-185
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• 2004

This paper shows a characteristics analysis of Switched Reluctance Motor(SRM) for design optimization. The static and dynamic characteristics are analyzed by simulation case of 6/4 and 12/8 pole machine. The torque, efficiency and acoustic noise are tested to compare drive performances.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제53권4호
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• pp.224-228
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• 2004

The switched reluctance motor(SRM) drive system provides a good adjustable speed and torque characteristics. SRM has the possibility of maintaining full power over a wide speed range. So, many attempts are being done from home appliances to industrial machinery and tools. Especially, the traction drive of SRM is one of a good application due to it's torque characteristics. However, because of the switching mechanism, it has some disadvantage of noise and vibration. It is difficult to adopt to an appliance demanding silence. A noise simulations and test of 3-phase 6/4, 6/8 and 12/8 SRM were done in other to compare each other. The test results show that 12/8 SRM has good noise characteristics.

• 전력전자학회논문지
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• 제10권2호
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• pp.148-154
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• 2005

SRM은 회전자의 위치에 따라 상권선의 여자시점이 결정되므로 회전자의 정확한 위치정보가 요구된다. 회전자 위치검출을 위해 절대형 엔코더 및 레졸버를 사용할 경우 초기 회전자 위치 검출이 가능하여 초기기동이 가능하지만 경제성을 고려할 때 적절하지 않다. 증분형 엔코더의 경우 초기 회전자 위치 검출이 용이하지 않아 초기기동의 문제가 있고, 홀센서를 이용할 경우 별도의 링마그넷을 부착하여야 하는 단점이 있다. 초기기동과 경제성을 고려할 때 슬롯디스크 및 옵토 인터럽터를 이용한 광센서 기법이 적합하지만, 이 방식은 6/4 pole SRM의 경우 3개의 옵토 인터럽터와 슬롯디스크가 필요하다. 반면에 본 논문에서는 단지 2개의 광센서만을 이용하여 3상 6/4 pole SRM을 구동하였으며 초기기동 및 정·역 운전을 가능하게 하였다. 광센서의 개수를 1개 줄이고 슬롯디스크를 제거함으로써 제작의 편리성과 경제성이 개선되었으며 슬롯디스크 취부면적이 제거되어 모터의 부피도 줄일 수 있었다.

• Journal of international Conference on Electrical Machines and Systems
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• 제2권1호
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• pp.40-44
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• 2013

This paper presents a design and characteristics analysis of novel 2-phase 4/3 switched reluctance motor (SRM) with short flux path for an air-blower application. The desired air-blower is unidirectional application, and requires a wide positive torque region without torque dead-zone. In order to get a wide positive torque region without torque dead-zone during phase commutation, asymmetric inductance characteristic with non-uniform air-gap is considered. The proposed motor could be started at any rotor position with high efficiency drive. The proposed 2-phase 4/3 SRM is verified by finite element method analysis.

• Journal of Electrical Engineering and Technology
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• 제12권5호
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• pp.1864-1871
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• 2017

This paper presents a design of a 2-phase segmental stator type 4/3 switched reluctance motor (SRM) for air-blower application. The air-blower requires only one direction rotation, high rotor speed without torque dead-zone. In order to satisfy the requirements of the load, the rotor of the 4/3 proposed SRM is designed with wider rotor pole arc and non-uniform air-gap is applied on the rotor shape. With a special rotor structure, the motor generates a wider positive torque region and has no torque dead-zone. The stator of the proposed SRM is constructed with two segmental C-cores, and there are no magnetic connections between 2 C-cores. The flux follows in a short closed loop in each C-core and has no reversal flux in the stator. The static and dynamic characteristics of the proposed motor are analyzed by the finite element method (FEA) and Matlab-Simulink, respectively. In order to verify the design, a prototype of the proposed motor has manufactured for laboratory test. The performance of the proposed motor is verified by the simulation and experimental results.

• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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• 제4B권2호
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• pp.47-53
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• 2004

The salient pole rotor type single phase SRM (switched reluctance motor) uses radial and axial direction magnetic flux simultaneously. Therefore, the output power per unit volume is very high and the shaft length is shorter than other types of SRMs with the same output. Furthermore, it can be manufactured with low cost owing to its simple structure and driving circuit. The prototype was designed using the theory of the traditional rotating machine and 3D FEM analysis. On this paper, the experiment apparatus, which includes the fabricated prototype in previous researches, was fabricated to measure the current and voltage of the prototype. Then the flux linkage, inductance and magnetic co-energy were calculated using the experimental results. Finally, the measured magnetic co-energy was compared with the simulated magnetic co-energy.

• 조명전기설비학회논문지
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• 제16권5호
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• pp.61-65
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• 2002

SRM 토크는 인덕턴스 프로파일과 전류에 의해 발생한다. 발생한 SRM 토크는 전류제어시 turn-off 각을 제어함으로써 최대화 할 수 있고, 본 논문에서는 최소자승법을 이용하여 구한 함수를 통해 Turn-off 각을 제어할 수 있는 방안을 제안하였다. 시뮬레이션은 3상 6/4극 SRM을 대상으로 하였고, 제안한 방법에 의해 최대 평균토크가 됨을 시뮬레이션을 통해 증명하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 A
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• pp.47-50
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• 1997

The FEM(Finite Element Method) can be used to analysis SRM(Switched Reluctance Motor) as it can account for the salient pole geometry of the stator and rotor and the nonlinear properties of the magnetic materials. However, FEM requirers a lot of computer memory and computing time because, the kind of SRM drivers is verity and the switching strategies are various for one SRM driver. In this paper we proposed the method of analysis of a SRM which results are similar to FEM and has very short computing time. The Inductance and torque for each phase current at each rotor position are calculated by using two-dimensional nonlinear FEM analysis. Using the look-up table of inductance and torque and the voltage equations of SRM we obtained the phase current and torque. To verify proposed algorithm, 3 phase 6/4 SRM is analysed and found a good agreement with FEM results. And computing time is about 1/1600 of the FEM analysis.