Inverter circuit and structure thereof

The invention discloses an inverter circuit and a structure thereof. The inverter circuit comprises PCB (printed circuit board), an insulating material, a radiation seat and clamp springs. Three circuits consisting of a plurality of transistors are arranged on the PCB, and the transistors are MOSFETs (metal-oxide-semiconductor field effect transistor) or IGBTs (insulated gate bipolar transistor). Each circuit is formed by connecting the transistor units in parallel, and each transistor unit comprises two MOSFETs or two IGBTs. Four rectangular protrusions are arranged on the radiation seat, the four rectangular protrusions are in parallel arrangement and are separated to form three spaces, the transistors fixed on the PCB are also positioned in the three spaces formed by separating the four rectangular protrusions,and are symmetrically attached to side faces of the rectangular protrusions, and radiation materials are arranged between the transistors and the side faces of the rectangular protrusions. The transistors on the side faces of the rectangular protrusions are compressed closely two ends of the clamp springs. To achieve the purpose of overcoming the shortages of high cost, easiness in pseudo soldering and poor thermal conductivity of conventional inverters, the inverter circuit and the structure thereof with low cost, fine universality, and fine electrical performance and thermal conducting effect are designed in the scheme.