Improved structure of LLC resonant converter

The invention discloses an improved structure of an LLC resonant converter. The improved structure comprises a main power transformer and an Lm parallel resonant inductor, the main power transformer comprises a primary side LLC circuit and a secondary side circuit, the Lm parallel resonant inductor is magnetically integrated on the primary side LLC circuit, the primary side LLC circuit comprises an L1 inductor, an Lr series resonant inductor and a first field effect transistor assembly, and the secondary side circuit comprises a second field effect transistor assembly; the Lm parallel resonant inductor and the main power transformer are magnetically integrated, the integration of the parallel inductor is realized by controlling the primary inductance value of the transformer, one parallel resonant inductor is reduced, the size of the converter is reduced, the weight of the converter is reduced, the power density of an aviation power supply product is improved, and the converter can be popularized to power sup