Modular system for converting a DC electrical power into three-phase electrical power and method the same

A system for converting a direct electrical power into three phase alternating electrical power comprising:

• three switching arms, including an assembly on a printed circuit board of at least one power module per switching arm, an electrical energy recovery module for recovering of electrical energy available upon soft switching which is transmitted from the electrical energy recovery module to an electrical energy storage and a coil controlling current flowing to an electrical storage from the electrical energy recovery module for soft switching, wherein each switching arm comprises associated power modules, the power modules comprising a first capacitor for each alternating output phase of the system and a second capacitor placed between the electrical energy recovery module and a ground, and wherein the electrical energy recovery module comprises three branches linked at a junction point, with a first branch comprising a switch and a third capacitor placed between the switch and the ground, a second branch comprising a diode, and a third branch comprising an inductor.