| Abstract |
This paper presents a design and construction of an integrated magnetic element IME to achieve high efficiency and high power density in 1250 W LLC resonant converter. The advantage of the presented LLC-type resonant converter structure, with integrated magnetic element (IME) is the possibility of easy adaptation to various power levels. Superposition of two magnetic inductions oriented antiparallelly in the chosen areas of IME allows reduction of the volume required for inductive elements, increased coefficient of transferred power to volume and reduction of parasitic capacitances. In addition, due to a nearly sinusoidal shapes of currents in the resonant circuit, the losses due to operating frequency are also minimal. Thus, the described DC-DC resonant converter dedicated for lighting application based on special integrated magnetic element (IME) has achieved requirements concerning low-cost and high-efficiency. The magnetic component can utilize one or two pairs of the cores. Scalable core construction allows to build a power supply with power range from 300W to 1500W. |
