Abstract: An electrical device such as a power control apparatus comprises a case and at least one electrical component accommodated in the case. The case has a flow path for a cooling fluid. The flow path is formed between a bottom portion and a cover. The flow path is elongated generally along a U shape. The bottom portion and the cover are joined by welding. The cover is formed with protruding portions protruding into the flow path. The protruding portions have shapes to reduce stress concentration on welding portions. A stress caused by a pressure of the cooling fluid may acts on a distal end formed inside of the U shape in a concentration manner.

Abstract: An electrical device such as a power control apparatus comprises a case and at least one electrical component accommodated in the case. The case has a flow path for a cooling fluid. The flow path is formed between a bottom portion and a cover. The flow path is elongated generally along a U shape. The bottom portion and the cover are joined by welding. The cover is formed with protruding portions protruding into the flow path. The protruding portions have shapes to reduce stress concentration on welding portions. A stress caused by a pressure of the cooling fluid may acts on a distal end formed inside of the U shape in a concentration manner.

Abstract: An electric vehicle includes: a motor for traveling; a transmission connected to the motor; a battery; an inverter configured to convert direct-current power output by the battery, into alternating-current power for driving the motor; a capacitor connected between a positive electrode of direct-current input terminals of the inverter and a negative electrode of the direct-current input terminals of the inverter; and a controller configured to change a gear stage of the transmission when both of a condition i) and a condition ii) are satisfied. The condition i) is a condition that the rotation speed of the motor is in a predetermined range. The condition ii) is a condition that the output of the motor exceeds a predetermined output threshold.

Abstract: An electrical device is provided. The electrical device includes a case, a first electrical part, a second electrical part, and a connecting portion. The case includes a first case and a second case coupled to the first case. The first electrical part is fixed to the first case. The second electrical part is fixed to the second case. The connecting portion is configured to connect a first conductor extending from the first electrical part and a second conductor extending from the second electrical part each other. Either one of the first case and the second case includes a through hole. The connecting portion is disposed so as to be entirely visible from the through hole as viewed from an outside of the case.

Abstract: An on-vehicle structure of a power converter includes a housing of the power converter mounted on a vehicle, a structure mounted on the vehicle, and a high-voltage connector attached to the housing. The high-voltage connector is configured to apply a voltage exceeding a predetermined threshold voltage, the high-voltage connector is positioned between the housing and the structure such that the high-voltage connector faces the structure in a removal direction of the high-voltage connector when the high-voltage connector is attached to the housing, and in a state where the high-voltage connector is attached to the housing, a length of a portion of the high-voltage connector embedded in the housing is determined so as to be longer than a distance between the high-voltage connector and the structure.

Abstract: A vehicle includes a motor housing accommodating motors for driving wheels, and a power control unit fixed on the motor housing. The power control unit includes: a stacked unit in which multiple power modules accommodating power semiconductor elements for electric power conversion and multiple coolers are stacked; and reactors. The stacked unit is disposed in the case of the power control unit such that the stacking direction of the power modules and the coolers is directed toward the vehicle-longitudinal direction. The reactors are disposed in the case so as not to overlap with the stacked unit as viewed from the stacking direction.

Abstract: A power converter disclosed herein may include power conversion circuits connected in parallel and a cutoff switch provided in each of the power conversion circuits. The cutoff switch may be configured to cut off connection of corresponding one of the power conversion circuits from other power conversion circuit. In the power converter disclosed herein, the cutoff switches of the power conversion circuits may be housed in a first module.

Abstract: A power converter disclosed herein may include power conversion circuits connected in parallel and a cutoff switch provided in each of the power conversion circuits. The cutoff switch may be configured to cut off connection of corresponding one of the power conversion circuits from other power conversion circuit. In the power converter disclosed herein, the cutoff switches of the power conversion circuits may be housed in a first module.

Abstract: A power conversion device includes a case including an upper case and a lower case; an inverter that is accommodated in a first partial case and is fixed to the first partial case, the first partial case being one of the upper case and the lower case; and a capacitor that is connected to the inverter by a positive electrode bus bar and a negative electrode bus bar, the capacitor being disposed in an internal space of a second partial case that is another of the upper case and the lower case. The first partial case includes a fastening portion that extends from an internal space of the first partial case to the internal space of the second partial case. In the internal space of the second partial case, the capacitor is fastened to the fastening portion.

Abstract: An electric vehicle includes: a motor for traveling; a transmission connected to the motor; a battery; an inverter configured to convert direct-current power output by the battery, into alternating-current power for driving the motor; a capacitor connected between a positive electrode of direct-current input terminals of the inverter and a negative electrode of the direct-current input terminals of the inverter; and a controller configured to change a gear stage of the transmission when both of a condition i) and a condition ii) are satisfied. The condition i) is a condition that the rotation speed of the motor is in a predetermined range. The condition ii) is a condition that the output of the motor exceeds a predetermined output threshold.

Abstract: A power conversion device includes a case including an upper case and a lower case; an inverter that is accommodated in a first partial case and is fixed to the first partial case, the first partial case being one of the upper case and the lower case; and a capacitor that is connected to the inverter by a positive electrode bus bar and a negative electrode bus bar, the capacitor being disposed in an internal space of a second partial case that is another of the upper case and the lower case. The first partial case includes a fastening portion that extends from an internal space of the first partial case to the internal space of the second partial case. In the internal space of the second partial case, the capacitor is fastened to the fastening portion.

Abstract: An electrical device is provided. The electrical device includes a case, a first electrical part, a second electrical part, and a connecting portion. The case includes a first case and a second case coupled to the first case. The first electrical part is fixed to the first case. The second electrical part is fixed to the second case. The connecting portion is configured to connect a first conductor extending from the first electrical part and a second conductor extending from the second electrical part each other. Either one of the first case and the second case includes a through hole. The connecting portion is disposed so as to be entirely visible from the through hole as viewed from an outside of the case.

Abstract: An on-vehicle structure of a power converter includes a housing of the power converter mounted on a vehicle, a structure mounted on the vehicle, and a high-voltage connector attached to the housing. The high-voltage connector is configured to apply a voltage exceeding a predetermined threshold voltage, the high-voltage connector is positioned between the housing and the structure such that the high-voltage connector faces the structure in a removal direction of the high-voltage connector when the high-voltage connector is attached to the housing, and in a state where the high-voltage connector is attached to the housing, a length of a portion of the high-voltage connector embedded in the housing is determined so as to be longer than a distance between the high-voltage connector and the structure.

Abstract: A power control device includes a cooling medium flow channel provided on a lower portion of a casing of the power control device; a cover attached to a lower surface of the casing with a gasket interposed between the cover and the lower surface, the gasket surrounding the cooling medium flow channel, the cover closing the cooling medium flow channel; and a groove or a protrusion provided on the lower surface at a position between the gasket and an outer edge of the lower surface.

Abstract: A mounting structure for a power converter in a vehicle is provided. The power converter includes a plurality of voltage converter circuits connected in parallel, and each of the plurality of voltage converter circuits includes a reactor, in which the power converter includes: a main body containing at least one of the reactors and a switching device of the voltage converter circuits; and a sub-body containing remaining reactors, the sub-body being electrically connected to the main body by a cable. The main body is fixed to a vehicle body via a bracket in a front compartment such that a gap is provided below the main body, and the sub-body is connected to a lateral side of the main body in a vehicle width direction such that a front end of the sub-body aligns with a front end of the main body.

Abstract: A vehicle includes a motor housing accommodating motors for driving wheels, and a power control unit fixed on the motor housing. The power control unit includes: a stacked unit in which multiple power modules accommodating power semiconductor elements for electric power conversion and multiple coolers are stacked; and reactors. The stacked unit is disposed in the case of the power control unit such that the stacking direction of the power modules and the coolers is directed toward the vehicle-longitudinal direction. The reactors are disposed in the case so as not to overlap with the stacked unit as viewed from the stacking direction.

Abstract: An electrical power converter is configured to perform an electrical power conversion with two electricity storage apparatuses, the electrical power converter has: four switching elements which are electrically connected in series and which are housed in the electrical power converter such that the four switching elements are located at four corners of a planar quadrangular region respectively; a first conductive path which electrically connects a first and second switching elements among the four switching elements; and a second conductive path which electrically connects a third and fourth switching elements among the four switching elements, wherein the second conductive path intersects with the first conductive path in a planar view.

Abstract: An electric power converter that can easily be assembled is provided. An electric power converter includes a semiconductor stacking unit, a frame and a spring unit. The semiconductor stacking unit has a configuration in which the semiconductor modules and coolers are stacked. The spring unit is inserted between one end of the semiconductor stacking unit in a stacking direction, and a support provided on the frame, and fixes the semiconductor stacking unit while applying pressure thereto. The spring unit is provided with a first plate, a second plate, and a coil spring sandwiched between the first and second plates. A recess is provided in the first plate so as to have a gap between the first plate and the end surface of the semiconductor stacking unit. A penetrating passage through which the entire spring unit passes along a bottom of the recess is provided in the spring unit.

Abstract: An electric power converter that can easily be assembled is provided. An electric power converter includes a semiconductor stacking unit, a frame and a spring unit. The semiconductor stacking unit has a configuration in which the semiconductor modules and coolers are stacked. The spring unit is inserted between one end of the semiconductor stacking unit in a stacking direction, and a support provided on the frame, and fixes the semiconductor stacking unit while applying pressure thereto. The spring unit is provided with a first plate, a second plate, and a coil spring sandwiched between the first and second plates. A recess is provided in the first plate so as to have a gap between the first plate and the end surface of the semiconductor stacking unit. A penetrating passage through which the entire spring unit passes along a bottom of the recess is provided in the spring unit.

Abstract: A power conversion device includes a laminated unit, a reactor, a shield, and coolant passages. In the laminated unit, flat-plate semiconductor modules housing semiconductor elements and flat-plate cooling plates are laminated. The shield is interposed between the reactor and electronic components. The coolant passages supply coolant to or discharge coolant from the laminated unit. The coolant passages pass through an interior of the shield.