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An effective design method of surge protection circuits for an active EMI filter (AEF) is proposed. The overcurrent and overvoltage at the voltage-sense voltage-compensate type AEF due to a surge is analyzed, and protection circuits using the transient voltage suppression (TVS) diodes are designed. Effects of protection circuits are validated by a 2kV surge test. Performances of the AEF for the noise...
An analytical method to calculate the electric- and magnetic fields near a planar PDN with decoupling capacitors has been proposed. Magnetic current source along the plane edges with multiple decoupling capacitors is calculated using the cavity resonant model. The electric- and magnetic fields in the near field region calculated from the magnetic currents are validated with the results obtained using...
Topology selection of the wireless power transfer system is an important design step, since each topology has very different power transfer characteristics. In this paper, an efficient analytical methodology to find optimal topology of wireless power transfer is presented. Several parameters, such as efficiency, imaginary power, and voltage gain, are analyzed and compared with varying frequency, coupling...
A method to visualize the spatial distribution of the self- and mutual-inductances and a coupling parameter between inductive couplers is proposed. Identifying the spatial distribution of the coupling parameter could be useful in optimizing wireless-power-transfer coils, especially when placing ferrite materials or shielding structures.
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