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원준희(June-Hee Won),정달호(Dal-Ho Cheong),오재윤(Jae-Yoon Oh) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
In this paper, the new control algorithm is proposed that compensates instantaneously the active and reactive components of the input currents by the synchronous d,q axis conversion of a single-phase current in controlling the single-phase AC/DC parallel converters for a high speed train. The leakage inductance of a transformer was used as a boost inductance and the ripple of a transformer's primary current was reduced considerably by the parallel operation of the two converters with a proper switching phase-shift. The stable and fast control response characteristic is certificated by a simulation.
권선형 유도기와 농형 유도기를 이용한 고조파 보상 시스템의 비교
이경훈(Kyoung-Hun Lee),정달호(Dal-Ho Cheong),오재윤(Jae-Yoon Oh) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
본 논문에서 비교하는 두시스템은 모두 전력계통에서 발생할 수 있는 고조파 전류를 효과적으로 보상할 수 있는 시스템이다. 전력계통에서 고조파전류는 계통전압에 장해를 주기 때문에, 프릿카나 각종 전력용 기기의 발열, 진동, 소음 혹은 유도잡음 장해등의 원인이 된다. 따라서, 이에 대한 대책이 중요한 문제가 되고있다. 본 논문은 이러한 고조파보상 시스템의 새로운 형태로써, 폴라이훨에 의해서 만들어지는 에너지 저장시스템에, 전압형 PWM 인버터를 병용하여 순시제어가 가능한 시스템을 설계하는 것이다. 그리구 여기에 사용되는 회전기로 각각 권선형과 농형을 사용하여 시스템을 구성하고 그 특징과 장/단점을 비교 분석하였다.
2상 통전 방식에 따른 동기 리럭턴스 모터의 소음 특성 분석
오재윤(Jae-Yoon Oh),정달호(Dal-Ho Cheong),김정철(Jung-Chul Kim) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
In this paper, we operate Synchronous Reluctance Motor(SynRM) using the two-phase conduction method Acually SynRM is operated by the sinusoidal PWM method but in home-appliance there is many restrictions of making the motor such as the method of winding, the shape of rotor etc. Therefore it is possible that there is little difference of performance between the two-phase conduction method and the sinusoidal PWM method. In this paper the characteristics of motor noise will be analyzed especially in the case of using the two-phase conduction method by experiment results.
변형된 dual-decay 회로를 이용한 SRM의 소음 저감
오재윤(Jae-Yoon Oh),임준영(Jun-Young Lim),김형섭(Hyung-Sup Kim),정달호(Dal-Ho Cheong) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
The recent flurry of activities and interest in Switched Reluctance Motor(SRM) has focused attention on various issues associated with implementing the SRM in the mass commertial Market. One such issue is the noise generated by radial force. In this paper, we proposed the circuit to reduce the noise of SRM using LC Resonant characteristic. The usefulness of proposed circuit is verified by experimental result.<br/> <br/>
이동명(Dong-Myung Lee),오재윤(Jae-Yoon Oh),정달호(Dal-Ho Cheong) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
This paper proposes a voltage compensation method to improve the control performance of B4 inverter which is studied for low-cost drive systems. The B4 inverter employs only four switches and it has a center-tapped connection in the split dc-link capacitors to one phase of a three-phase motor. In the B4 topology, unbalanced three-phase voltages will be generated by the de link voltage ripple To solve this problem, we present a voltage compensation method which adjusts switching times considering de link voltage ripple The proposed method 1S verified by simulation results.