Abstract: An inverter device includes a substrate, upper arm elements, lower arm elements, positive and negative input electrodes, and an output electrode. The upper arm elements serve as an upper switching element and are arranged along a first direction. The lower arm elements serve as a lower arm switching element and are arranged along the first direction. At least one of bus bars of the positive and negative input electrodes and the output electrode extends parallel to the first direction. At least one of the bus bars of the positive and negative input electrodes and the output electrode has a length in the longitudinal direction that is greater than a width between two ends of the upper arm elements and the lower arm elements in the first direction.

Abstract: An inverter device includes a substrate, upper arm elements, lower arm elements, positive and negative input electrodes, and an output electrode. The upper arm elements serve as an upper switching element and are arranged along a first direction. The lower arm elements serve as a lower arm switching element and are arranged along the first direction. At least one of bus bars of the positive and negative input electrodes and the output electrode extends parallel to the first direction. At least one of the bus bars of the positive and negative input electrodes and the output electrode has a length in the longitudinal direction that is greater than a width between two ends of the upper arm elements and the lower arm elements in the first direction.

Abstract: A power converter apparatus includes a first substrate and a second substrate closely arranged to face each other, switching elements mounted on respective mounting surfaces of the first and second substrates, a primary and a secondary bus bars extending between the first and second substrates, an output terminal electrically connected to the primary bus bar, and two input terminals provided on the second substrate. The direction in which current flows into the first substrate and the direction in which current flows into the second substrate via the input and the output terminals are opposite to each other, and the direction in which the current flows into the primary bus bar and a direction in which the current flows into the secondary bus bar are opposite to each other. The first substrate and second substrate include heat dissipating members provided on surfaces opposite to the mounting surfaces for the switching elements.