• 전력전자학회논문지
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• 제10권3호
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• pp.211-218
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• 2005

SRM은 간단하면서 견고한 전동기 구조. 넓은 속도범위에 걸쳐 고효율, 탁월한 제어성능 등을 가지고 있다. 그러나 SRM의 전원부에는 일반적으로 다이오드 정류기를 사용하고 정류기의 출력단에 평활용 커패시터를 사용한다. 따라서 입력전류 파형은 폭이 좁은 펄스형태의 전류를 발생하게 되며 많은 고조파의 성분을 포함하여 제어시스템의 오동작을 발생하게 되는 원인이 된다. 본 논문에서는 energy-efficient C-dump 컨버터의 입력 전원부에 승압형 컨버터를 연결하여 고조파 성분을 저감하여 역률을 개선하는 구동시스템에 관하여 연구하였다. SRM제어를 위해 저 가격의 원칩 80C196KC와 각도제어를 위해 EPROM을 이용하였다. 시뮬레이션과 실험을 통하여 제안된 시스템의 역률 개선을 확인하였다.

• 융복합기술연구소 논문집
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• 제3권2호
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• pp.11-15
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• 2013

These days, the quality of goods is required to improve in the process of manufacturing the semiconductor through the short working hours and clean transportation. The non-contact transport device using magnetic levitation can be a solution in the manufacturing process. The non-contact transport device, using electromagnetic actuation, is the system that can actually transport them by only using attraction force from the electromagnetic source without authentic contact. Moreover, the system using electromagnetic force has a substantial number of benefits ranging from unrestricted design to unlimited expansion. Especially, the price is competitive. The non-contact transport device, using electromagnetic force, has another merits in controlling by giving the same amount of attraction force to ferromagnetic body. By controlling the currents given to coil, the operator is able to decide the direction of the transportation. In order to design the optimal system, we implemented five different things such as the presence of the links below the electromagnetic, the electromagnet changes due to coupling method, the change according to the thickness of the links below electromagnet, due to changes in between electromagnetic distance direction, and the size of the current. Through simulations and the optimum design, it seems to control easily and figure out the exact size of power. It might definitely be the non-contact transport that can sharply reduce tiny scratches and particles in the process of manufacturing the semiconductor.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제53권12호
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• pp.691-699
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• 2004

SRM(Switched Reluctance Motor) drives require the accurate position information of the rotor. These informations are generally provided by a tacho generator or digital shaft-position encoder These speed sensors lower the system reliability and require special attention to noise. This paper describes a new approach to estimating SRM speed from measured terminal voltages and currents for speed sensorless control. The described method is based on the sliding mode observer. The rotor speed and position observers are estimated by the adaptation law using the real and estimated currents. However, the conventional adaptive sliding mode observer based on the variable structure control theory has some disadvantages that the estimated values including the high-frequency chattering and the steady state error generated due to the infinite feedback gain chosen and the discontinuous control input. To reduce the chattering and steady state error, an integrator is also inserted in the sliding mode observer strategy. The described adaptive sliding mode observer decreases the vibration to the switching hyper-plane of the sliding mode by adding integrator. The described methodology incorporates the Lyapunov algorithm to drive the rotor speed and the stator resistance such that it can overcome the problem of sensitivity in the face of SRM parameter variation. Also, without any mechanical information. The rotor speed of SRM is obtained form adaptive scheme. The described method is verified through the simulation and experiment.