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영구자석의 반발력과 코리올리 효과를 이용한 트로이덜 형 자이로의 설계
신혜웅(Hye-Ung Shin),주성탁(Sung Tak Jou),이교범(Kyo-Beum Lee),한만엽(Man Yop Han) 대한전기학회 2015 전기학회논문지 Vol.64 No.5
This paper deals with the design of 1-kW troidal type gyro. In general, gyro can be used as magnet bearing or flywheel energy storage device. The proposed troidal type gyro is used as a flywheel energy storage device. The gyro is capable of high-speed rotation in the air. The coriolis effect is taken into account when designing the rotor of the proposed gyro. Also the repulsive power of the permanent magnet is considered while selecting the shape and the thickness of the magnet. The neodymium is used as material of the magnets in this paper. The number of magnets are selected accordingly to reduce these torque ripples because torque ripples is an important factor while designing the gyro. The designed troidal type gyro is verified through the Finite Element Method (FEM).
신혜웅(Hye-Ung Shin),이교범(Kyo-Beum Lee) 대한전기학회 2015 전기학회논문지 Vol.64 No.3
This paper deals with the design method of 1kW-Switched Reluctance Generator (SRG) for wind power applications. The coefficient of the output equation is determined according to the purpose specification for design of SRG. Detailed design is carried out, after selecting the outer diameter of the rotor on the basis of the output equation. The generation characteristic of designed generator is verified by using Finite Element Method (FEM).
5상 유도전동기 구동 시스템을 위한 인버터의 개방고장진단 방법
백승구(Seung-Koo Baek),신혜웅(Hye-Ung Shin),강성윤(Seong-Yun Kang),박춘수(Choon-Soo Park),이교범(Kyo-Beum Lee) 대한전기학회 2016 전기학회논문지 Vol.65 No.2
This paper proposes a fault diagnosis method for an open-fault in inverter driving five-phase induction motor. The five-phase induction motor has a high output torque and small torque ripple in comparison to three-phase. The best advantage of the five-phase induction motor is fault diagnosis and tolerant control using redundancy of phases. This paper uses an inverter as a power converter for driving a five-phase induction motor. If a switch of inverter occurs to the open-fault, this problem is the influence on the output current and output torque. To solve this problem, there is need of an accurate diagnosis and fault switch distinction. Therefore, this paper propose a fault detection method of the open-fault switches for the fault diagnosis. First, analyzing the pattern for the open-circuit fault of one phase. next, analyzing the pattern for the open-circuit fault of each inverter switches. Through the pattern analysis, It defines the scope of each of the failure switch. Thereafter, By using an algorithm that proposes to perform a fault diagnosis method. The proposed algorithm is verified from the experiment with the 1.5 kW five-phase induction motor.