Abstract: A contactless power feeding system includes: a primary circuit for supplying primary power to a power feeding coil; and a primary control circuit for controlling the primary circuit. The primary control circuit acquires, from a secondary control circuit, a secondary measured value and a secondary target value of secondary power received by a power receiving coil. The primary control circuit performs control processing and update processing alternately and repeatedly. The control processing is processing of controlling the primary circuit to bring the primary measured value into conformity with a primary target value. The update processing is processing of updating the primary target value. The update processing includes processing of calculating the primary target value based on transfer efficiency to be determined by the primary measured value and the secondary measured value and on the secondary target value.

Abstract: A semiconductor module according to the present disclosure includes: an insulating substrate; a first conductor disposed on the insulating substrate; a second conductor disposed on the insulating substrate; a first semiconductor element disposed on the first conductor; a second semiconductor element disposed on the second conductor; a first busbar connected to the first conductor in a region between the first semiconductor element and the second semiconductor element; a second busbar connected to the second semiconductor element; and an output busbar connecting the first semiconductor element to the second conductor and connected to the second conductor in the region between the first semiconductor element and the second semiconductor element. The output busbar is disposed at least partially overlapping the first busbar, and in an overlap region between the output busbar and the first busbar, the output busbar is located above the first busbar.

Abstract: An electric power conversion device according to the present disclosure includes: a positive electrode unit including a positive main conductor portion and a positive joining conductor portion; a negative electrode unit including a negative main conductor portion and a negative joining conductor portion; a capacitor circuit connected to the positive electrode unit and the negative electrode unit; an electric power conversion unit connected to the positive main conductor portion, the positive joining conductor portion, the negative main conductor portion, and the negative joining conductor portion; and a heat dissipation unit joined to the capacitor circuit unit and the electric power conversion unit. The positive main conductor portion and the negative main conductor portion are insulated from each other and arranged facing each other, and the positive joining conductor portion and the negative joining conductor portion are insulated from each other and arranged facing each other.

Abstract: A contactless power feeding system includes: a primary circuit for supplying primary power to a power feeding coil; and a primary control circuit for controlling the primary circuit. The primary control circuit acquires, from a secondary control circuit, a secondary measured value and a secondary target value of secondary power received by a power receiving coil. The primary control circuit performs control processing and update processing alternately and repeatedly. The control processing is processing of controlling the primary circuit to bring the primary measured value into conformity with a primary target value. The update processing is processing of updating the primary target value. The update processing includes processing of calculating the primary target value based on transfer efficiency to be determined by the primary measured value and the secondary measured value and on the secondary target value.

Abstract: An electric power conversion device according to the present disclosure includes: a positive electrode unit including a positive main conductor portion and a positive joining conductor portion; a negative electrode unit including a negative main conductor portion and a negative joining conductor portion; a capacitor circuit connected to the positive electrode unit and the negative electrode unit; an electric power conversion unit connected to the positive main conductor portion, the positive joining conductor portion, the negative main conductor portion, and the negative joining conductor portion; and a heat dissipation unit joined to the capacitor circuit unit and the electric power conversion unit. The positive main conductor portion and the negative main conductor portion are insulated from each other and arranged facing each other, and the positive joining conductor portion and the negative joining conductor portion are insulated from each other and arranged facing each other.

Abstract: An integrated optical device includes a plurality of semiconductor lasers which emit different wavelengths of laser light, a comparator circuit which compares voltages across terminals of the respective plurality of semiconductor lasers, and outputs a signal depending on the comparison result, a light-receiving element which outputs a photocurrent depending on the amounts of laser light emitted from the plurality of semiconductor lasers, and a current mirror circuit which switches between amplification and attenuation with respect to the photocurrent output from the light-receiving element based on the signal output from the comparator circuit, and outputs a monitor signal.