Patent ID: 8705242

Claim:
An inverter device that produces alternating-current power of a plurality of phases from direct-current power, the inverter device comprising: a plurality of power elements constituting a bridge circuit; a heat sink that is mounted with the power elements and that is capable of receiving heat generated by the power elements; a control wiring section that outputs control signals to the power elements; and a power wiring section that inputs and outputs current passed to the power elements, the power wiring section being constituted by a power substrate that is shaped of a flat plate, wherein each of the power elements has a main body section, in which a semiconductor chip is inserted in a resin by resin molding, and a lead section that extends from one side of the main body section and that is electrically connected with the power wiring section, and an upper arm unit, which is formed by aggregating the power elements on a power supply side of the bridge circuit, and a lower arm unit, which is formed by aggregating the power elements on a ground side of the bridge circuit, are arranged separately from each other, wherein the upper arm unit and the lower arm unit are arranged such that the lead sections face to the power wiring section constituted by the power substrate.