Abstract: A storage device stores failures and lessons. A processor accepts input of text serving as a question sentence in a multiple-choice quiz, computes an evaluation value for a consistency between the text and each of lessons stored in the storage device, and determines one lesson to serve as a correct option in the multiple-choice quiz and at least one lesson to serve as an incorrect option in the multiple-choice quiz, based on the evaluation value for each of the plurality of lessons computed in the computing operation.

Abstract: A vehicle drive unit includes an internal combustion engine (21), an electromotive unit (23) having a first electric motor (31) and a second electric motor (33), an inverter (27) disposed above the electromotive unit, a first harness (41) that electrically connects the inverter and a first terminal block (61) of the first electric motor, and a second harness (42) that electrically connects the inverter and a second terminal block (62) of the second electric motor. The first electric motor and the second electric motor are disposed in a vehicle front-rear direction. Of the first electric motor and the second electric motor, one electric motor is disposed on the front side in the front-rear direction, and the other electric motor is disposed on the rear side in the front-rear direction. The other electric motor is offset upward in the up-down direction with respect to the one electric motor.

Abstract: In a power conversion device, a semiconductor module, a bus bar assembly, and a smoothing capacitor are superposed on a cooler in the stated order from the cooler side. At least one of a cooling column-equipped member, which is at least one of the smoothing capacitor and the bus bar assembly, and the cooler is provided with a cooling column configured to transfer heat of the cooling column-equipped member to the cooler.

Abstract: A waterproof connector includes a contact, a housing, a seal member, and a cover member. An inserted portion of the housing is inserted in an insertion hole of a wall portion of a device case. The inserted portion includes an annular surface disposed flush to or with a step provided with respect to a surface of the wall portion. The seal member includes an annular first seal portion, fitted in an annular groove formed in the annular surface, and a covering portion, extending orthogonally from the first seal portion toward the surface side of the wall portion. The covering portion spanningly covers a first gap, which is a gap between an outer peripheral surface of the inserted portion and an inner peripheral surface of the insertion hole. The cover member is fixed to the wall portion across the covering portion.

Abstract: A waterproof connector includes a contact, a housing, a seal member, and a cover member. An inserted portion of the housing is inserted in an insertion hole of a wall portion of a device case. The inserted portion includes an annular surface disposed flush to or with a step provided with respect to a surface of the wall portion. The seal member includes an annular first seal portion, fitted in an annular groove formed in the annular surface, and a covering portion, extending orthogonally from the first seal portion toward the surface side of the wall portion. The covering portion spanningly covers a first gap, which is a gap between an outer peripheral surface of the inserted portion and an inner peripheral surface of the insertion hole. The cover member is fixed to the wall portion across the covering portion.

Abstract: A power conversion device such that heat dissipation can be improved is obtained. The power conversion device includes a power conversion circuit unit that converts direct current into alternating current using a semiconductor switching element, a heatsink on which the power conversion circuit unit is mounted, and which has a first passage through which a cooling medium is caused to pass, and a frame body that houses the power conversion circuit unit, seals the power conversion circuit unit between the frame body and the heatsink, and has a second passage through which a cooling medium is caused to pass, wherein the first passage and second passage are connected at an interface between the heatsink and frame body, thereby configuring a cooling passage.

Abstract: It is structured that plural service holes are provided on a surface of the casing, that a flange of a rubber plug for sealing the service hole has a lip seal that abuts against the casing of the power conversion equipment, that the rubber plug has a recessed section, that the surface of the casing is provided with a rib on an outer circumference side of the flange of the rubber plug, that an end surface of the rib is orthogonal to an axis of the service hole, and that a relationship of h1?h2 is established when a distance from an abutment surface of the lip seal to an end surface of the rubber plug on a side with the recessed section is set as h1 and a distance from the abutment surface of the lip seal to the end surface of the rib is set as h2.

Abstract: A power conversion device such that heat dissipation can be improved is obtained. The power conversion device includes a power conversion circuit unit that converts direct current into alternating current using a semiconductor switching element, a heatsink on which the power conversion circuit unit is mounted, and which has a first passage through which a cooling medium is caused to pass, and a frame body that houses the power conversion circuit unit, seals the power conversion circuit unit between the frame body and the heatsink, and has a second passage through which a cooling medium is caused to pass, wherein the first passage and second passage are connected at an interface between the heatsink and frame body, thereby configuring a cooling passage.

Abstract: It is structured that plural service holes are provided on a surface of the casing, that a flange of a rubber plug for sealing the service hole has a lip seal that abuts against the casing of the power conversion equipment, that the rubber plug has a recessed section, that the surface of the casing is provided with a rib on an outer circumference side of the flange of the rubber plug, that an end surface of the rib is orthogonal to an axis of the service hole, and that a relationship of h1?h2 is established when a distance from an abutment surface of the lip seal to an end surface of the rubber plug on a side with the recessed section is set as h1 and a distance from the abutment surface of the lip seal to the end surface of the rib is set as h2.