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강병극(B. K. Kang),김무현(M. H. Kim),임정규(J. G. Lim),정세교(S. K. Chung) 전력전자학회 2008 전력전자학술대회 논문집 Vol.- No.-
A novel lossless current sensing technique for a synchronous buck converter is presented. The inductor DCR method is generally used as a low cost and lossless current sensing technique of DC/DC converters. It is however difficult to obtain the accurate current value for the conventional DCR method because the inductor resistance varies depending on the operating frequency. In order to overcome this problem, an improved current sensing technique is proposed, which has the separated DC and AC sensing circuits. The concept and operation of the proposed method are explained and the experimental results are provided to show its effectiveness.
높은 공통모드 전압을 가지는 컨버터회로에서 인덕터 전류 측정방법
강병극(B. K. Kang),정세교(S. K. Chung) 전력전자학회 2009 전력전자학술대회 논문집 Vol.2009 No.1
A lossless inductor current sensing method for power converters with high common mode voltage such as a power factor correction(PFC) circuit is presented. The conventional DCR current sensing method is low cost and simple. However, this can not be used for the converters with high common mode voltage. In order to overcome this problem, an improved method using a voltage divider in proposed. The efficacy of proposed circuit is verified through the simulation and experimental results for the PFC circuit.