전력전자학회:학술대회논문집 (Proceedings of the KIPE Conference)
- 전력전자학회 2018년도 전력전자학술대회
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- Pages.210-212
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- 2018
A Novel Switching Mode for High Power Factor Correction and Low THD
- Park, Gyumin (ASG, ON semiconductor) ;
- Eum, Hyunchul (ASG, ON semiconductor) ;
- Yang, Seunguk (ASG, ON semiconductor) ;
- Hwang, Minha (ASG, ON semiconductor) ;
- Park, Inki (ASG, ON semiconductor)
- 발행 : 2018.07.03
초록
A new switching mode has been proposed to obtain high power factor and low THD in single stage AC-DC converter. The conventional voltage mode control in critical conduction mode distorts input current shape with poor THD in flyback topology. Once TRIAC dimmer is connected, visible flicker in the LED lamp is easily detected due to a lack of TRAIC holding current near the input voltage zero cross. The newly proposed method can shape the input current by providing a desired reference voltage so that low THD is obtained by ideal sinusoidal input current in case of no dimmer connection and flat input current performs good TRIAC dimmer compatibility in phase-cut dimming condition. To confirm the validity of the proposed method, theoretical analysis and experimental result from 8W dimmable LED lighting system are presented.
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