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- 저자 : Zhenzhu Fu (검색결과 2 건)
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Improving differential mode inductance in toroidal common mode inductors
Kaining Fu,Zhenzhu Lian,Wei Lan,Damin Zhang 전력전자학회 2023 JOURNAL OF POWER ELECTRONICS Vol.23 No.12
Toroidal inductors are widely used in switch mode power supplies to attenuate electromagnetic interference (EMI). However, conventional common mode (CM) inductors have limitations in achieving diff erential mode (DM) noise attenuation and may introduce near-field coupling. In this paper, the advantage and disadvantage of conventional CM inductors are investigated. An integrated inductor scheme is proposed to overcome the limitation. The proposed scheme maintains the same CM inductance as conventional toroidal CM inductors while significantly increasing the DM inductance and reducing leakage flux. This leads to reduced weight and size of discrete DM inductors and enables higher power density of the converter. The theoretical analysis is conducted using the equivalent magnetic reluctance model. Further validation is performed through 3D finite element method simulations, insertion loss measurements, and CM and DM noise spectrum measurements. Results demonstrate that the proposed integrated inductor scheme offers superior EMI performance compared with conventional CM inductors.
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Dandan Zhang,Zheng Wang,Liyun Shi,Wenqian Shang,Zhenzhu Fu,Dan He,Song Lin He 한국화훼학회 2016 화훼연구 Vol.24 No.2
In the present study, the plantlets in vitro of Paeonia suffruticosa ‘Wu Long Peng Sheng’ were used as laboratory materials. The proteome during adventitious root induction process was investigated to sift the related proteins by two-dimensional electrophoresis and mass spectrometry. The results indicated that the protein spots were concentrated in the acidity gel region (pH 4 - 7) and the spots number had a dynamic change ranged from 373 to 462 at the process of root induction (0 – 7 d). 8 spots significantly changed were analyzed with a mass spectrometer and identified using associated software and databases. The peptide information of the 8 spots was similar to the ATP synthase β-subunit of P. suffruticosa (Spots 1 - 4 and 8), P. tenuifolia (Spots 5), P. californica (Spot 6) and P. brownie ( Spots 7) r espectiv ely. T he expression levels of protein spots 1, 4, 5, 6 and 7 was dramatically downregulated, and that of protein spots 2 and 3 had a slightly opposite tendency on the 3rd day. The obviously decreased period is particularly interesting as it was consistent with the induction period of adventitious root primordial of tree peony plantlet in vitro. The ATP synthase β-subunit could be consumed for assembling the ATP synthase in order to supply energy to the rooting process. Therefore, we speculated that the ATP synthase β-subunit was involved in adventitious root initiation of tree peony plantlets in vitro and we expect that further studies should be carried out in order to export its action mechanism.
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