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Common Mode Noise Reduction for an LLC Resonant Converter by Using Passive Noise Cancellation
Younggon Ryu,Sungnam Kim,Geunseok Jeong,Jaesu Park,Duil Kim,Jongwook Park,Jingook Kim,Ki Jin Han 한국전자파학회JEES 2015 Journal of Electromagnetic Engineering and Science Vol.15 No.2
This paper describes the application of a passive noise cancellation method to a prototype inductor-inductor-capacitor (LLC) resonant converter by placing a compensation winding in a transformer to reduce common mode noise. The connection method for the compensation winding is investigated. A circuit analysis is implemented for the displacement currents between the primary and secondary windings in the transformer. The analyzed displacement currents are verified by performing a circuit simulation and a proper compensation winding connection that reduces common mode noise is found. The measurement results show that common mode noise is reduced effectively up to 20 dB in the 1 to 7 MHz frequency region for the prototype LLC resonant converter by using the proposed passive noise cancellation method.
휴대용 이동 통신기기의 슬림화를 위한 파워 칩 인덕터의 제품화
엄재현(Jaehyun Uhm),조일제(Iljae-Cho),서종고(Jong-go Seo),김성일(Sung-il Kim),김두일(Duil Kim),박준형(Junhyung Park) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
An obstacle is an element for power to small and slim the existing portable communication set. Developed Inductor for Chip-type electric power in needs to solve this. Stack applied Process, and used gap of a magnetic path, and made a height of an element to 1.0T or below, and this development commodity did product for saturation prevention to materials of silver. Saturation current characteristic of Chip-type inductor was low compare with winding-type inductors, but bulk against performance were had superior excellence. Chip-type inductor can raise performance per unit volume compared with the existing inductors at these papers. Therefore, acceleration can get growth of small and slim of a mobile product done, and expect.