Research Of Planar Passive Integration For Llc Resonant Converter

Compare to the discrete magnetic element, planar passive integration element has the advantage of high current density, high efficiency, low leakage inductance, good heat exchange, low EMI radiation, small volume. It has become an important investigative direction in power electronics. The paper introduces the technical of passive integration and the analysis method. Aiming at the LLC resonant converter, basing on the parameter design requirement and the parameter design method, a group of rosonant parameter has been designed. Using Orcad Capture simulation software, the parameter is correct. We made a model machine. To integrate the resonant inductance, the resonant capacitance, the parallel inductance and the transformer, a method is put forward: uses the special LC constitutional unit to integrate the resonant inductance and the resonant capacitance, and the excitation inductance of the transformer as parallel inductance. The integration of the four passive components minimizes the volume and improves the capacity. Point to the problem of hard to choose high dielectric constant material, this paper introduces the interleaved structure. It makes low dielectric constant material for high capacity possible.