研究了显像管等器件中偏转线圈三维磁场的空间谐波展开技术及其计算。

The space harmonic expansion technique is used for analyzing the 3d magnetic fields of the deflection yoke.

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将三维磁场计算的表面磁荷法和空间谐波展开技术相结合，提出了一种用于偏转线圈磁场计算的谐波表面磁荷法。

A harmonic surface charge method, which combine surface charge method with space harmonics expansion, was developed for the calculation of 3d magnetic fields of deflection yoke.

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通过对半控双三相12脉冲整流器的电流波形分析和傅立叶级数展开，得出系统的主要谐波成分。

Through analysis of the current waveform of the semi-control double three-phase 12-pulse rectifier and the expansion of Fourier series, the main harmonic components of the system were obtained.

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