Through the analysis of the circuit structure and electromagnetic interference(EMI)conduction path,the structure of the traditional harmonic filter is optimized so that it has the ability to suppress EMI.Using the str...Through the analysis of the circuit structure and electromagnetic interference(EMI)conduction path,the structure of the traditional harmonic filter is optimized so that it has the ability to suppress EMI.Using the structure of planar magnetic integration not only ensures the basic harmonic suppression ability of the harmonic filter,but also improves the EMI suppression effect.With a single-phase voltage source 500-W SiC inverter as the platform,the feasibility and effectiveness of the design scheme are experimentally verified.The results indicated that the planar magnetic integrated harmonic EMI filter satisfies the design requirements.Additionally,the proposed planar magnetic integration scheme can significantly reduce the volume and weight of the filter and increase the power density of the entire system.展开更多
Electromagnet interference troubles are more and more and complex with each pass day along with improvement of large system electronization. This article will analyze the interference problems caused by harmonic waves...Electromagnet interference troubles are more and more and complex with each pass day along with improvement of large system electronization. This article will analyze the interference problems caused by harmonic waves in large system. The generation,characteristic and perniciousness of harmonic waves will be qualitatively analyzed for summarizing practical experience to provide mentality and method for settling the large system electromagnet interference trouble. This article raises the approach and method of harmonic suppression from the root of harmonic generation during ultrashort wave transmission and through actual test and analyzing verification. The effectivity and correctness of the methods adopted are certified by theoretical analysis and experimental verification.展开更多
We theoretically investigate the attosecond pulse generation in an orthogonal multicycle midinfrared two-color laser field. It is demonstrated that multiple continuum-like humps, which consist of about twenty orders o...We theoretically investigate the attosecond pulse generation in an orthogonal multicycle midinfrared two-color laser field. It is demonstrated that multiple continuum-like humps, which consist of about twenty orders of harmonics and an intensity of about one order higher than the adjacent normal harmonics, are generated when longer wavelength driving fields are used. By filtering these humps, intense isolated attosecond pulses（IAPs） are directly generated without any phase compensation. Our proposal provides a simple technique to generate intense IAPs with various central photon energies covering the multi-ke V spectral regime by using multicycle midinfrared driving pulses with high pump energy in the experiment.展开更多
基金Supported by the National Natural Science Foundation of China(52007122).
文摘Through the analysis of the circuit structure and electromagnetic interference(EMI)conduction path,the structure of the traditional harmonic filter is optimized so that it has the ability to suppress EMI.Using the structure of planar magnetic integration not only ensures the basic harmonic suppression ability of the harmonic filter,but also improves the EMI suppression effect.With a single-phase voltage source 500-W SiC inverter as the platform,the feasibility and effectiveness of the design scheme are experimentally verified.The results indicated that the planar magnetic integrated harmonic EMI filter satisfies the design requirements.Additionally,the proposed planar magnetic integration scheme can significantly reduce the volume and weight of the filter and increase the power density of the entire system.
文摘Electromagnet interference troubles are more and more and complex with each pass day along with improvement of large system electronization. This article will analyze the interference problems caused by harmonic waves in large system. The generation,characteristic and perniciousness of harmonic waves will be qualitatively analyzed for summarizing practical experience to provide mentality and method for settling the large system electromagnet interference trouble. This article raises the approach and method of harmonic suppression from the root of harmonic generation during ultrashort wave transmission and through actual test and analyzing verification. The effectivity and correctness of the methods adopted are certified by theoretical analysis and experimental verification.
基金supported by the National Natural Science Foundation of China(Nos.11127901,61521093,11134010,11227902,11574332,1151101142,61690223,and 11274325)the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB16)the Youth Innovation Promotion Association of Chinese Academy of Sciences
文摘We theoretically investigate the attosecond pulse generation in an orthogonal multicycle midinfrared two-color laser field. It is demonstrated that multiple continuum-like humps, which consist of about twenty orders of harmonics and an intensity of about one order higher than the adjacent normal harmonics, are generated when longer wavelength driving fields are used. By filtering these humps, intense isolated attosecond pulses（IAPs） are directly generated without any phase compensation. Our proposal provides a simple technique to generate intense IAPs with various central photon energies covering the multi-ke V spectral regime by using multicycle midinfrared driving pulses with high pump energy in the experiment.
