Generalized frequency plane model of a spiral winding structure integrated power series resonator

The technology of integrated passive components for power electronics is at present being developed. Because of the compact structures and the special implementation techniques of these integrated modules, the high frequency parasitic resonances are normally significant and may have negative impact on the performance and EMI characteristics. However, the existing modeling technique can only predict the fundamental resonant frequency and showed neither the causes of the high frequency resonance nor how to calculate those accurately. Based on the modeling of multi-conductor transmission structures, this paper presents the modeling of the spiral winding structure integrated series resonant module. This structure can be treated as several multi-conductor transmission structures connected in certain patterns. Different connection patterns only determine the voltage and current boundary conditions with which the equations can be solved. The MATLAB calculation results correlate well with the small-signal measurement results. The calculation sensitivities with respect to variation of various parameters are also discussed and the causes of resonance at different frequencies are identified.