Abstract: In this power converter for a railroad vehicle, a cooling portion includes a first cooling portion arranged to block up an opening while ensuring watertightness and to come into contact with a semiconductor element through the opening, and a second cooling portion provided to be opposed to an outer surface of a power converter body not provided with the opening and adjacent to a side provided with the first cooling portion.

Abstract: In a power converter for a railroad vehicle, adjacent ones of a plurality of fins are spaced apart from each other from a base connected to a base portion to a distal end, and the plurality of fins further spread to both one side and the other side in an alignment direction from the base toward the distal end.

Abstract: A power converter for a railroad vehicle includes a first fin and a second fin having outer shapes different from each other as viewed in an alignment direction. On both ends of the first fin and the second fin in a running direction, non-overlapping regions in which the first fin and the second fin do not face each other in the alignment direction are located so as to sandwich an overlapping region, in which the first fin and the second fin face each other in the alignment direction, therebetween.

Abstract: This power conversion device for a railway vehicle includes a first radiation fin radiating heat from a semiconductor device and a second radiation fin arranged at a prescribed interval from the first radiation fin in a traveling direction for radiating heat from the semiconductor device. At least either one of the first and second radiation fins includes an air duct formed by partially not providing a plurality of fin portions.

Abstract: In this power converter for a railroad vehicle, a cooling portion includes a first cooling portion arranged to block up an opening while ensuring watertightness and to come into contact with a semiconductor element through the opening, and a second cooling portion provided to be opposed to an outer surface of a power converter body not provided with the opening and adjacent to a side provided with the first cooling portion.

Abstract: A power converter for a railway vehicle includes a power converter body configured to be installed on the railway vehicle; a first radiating fin unit arranged on a front side on the power converter body for dissipating heat from the power converter body; a second radiating fin unit arranged on the power converter body on a rear side for dissipating heat from the power converter body; and an air duct that takes in air from a region other than regions in which the first and second radiating fin units are disposed while the railway vehicle is moving, the air duct extending into a fin separation space that is defined as a space between the first radiating fin unit and the second radiating fin unit so as to guide air that is taken in into the fin separation space.

Abstract: In a power converter for a railroad vehicle, adjacent ones of a plurality of fins are spaced apart from each other from a base connected to a base portion to a distal end, and the plurality of fins further spread to both one side and the other side in an alignment direction from the base toward the distal end.

Abstract: A power converter for a railroad vehicle includes a first fin and a second fin having outer shapes different from each other as viewed in an alignment direction. On both ends of the first fin and the second fin in a running direction, non-overlapping regions in which the first fin and the second fin do not face each other in the alignment direction are located so as to sandwich an overlapping region, in which the first fin and the second fin face each other in the alignment direction, therebetween.

Abstract: A power converter, including a heat generating element, and a cooler that includes a heat receiving plate, a plurality of cooling fins and a baffle plate. The heat generating element and the plurality of cooling fins are respectively mounted on two different surfaces of the heat receiving plate. Each cooling fin is a plate of a rectangular shape, and the plurality of cooling fins are arranged in parallel to one another, surfaces of any adjacent two of the cooling fins defining a course for cooling air to flow therethrough. The baffle plate is provided across the plurality of cooling fins, and has a substantially rectangular surface in a direction perpendicular to a direction of the courses.

Abstract: A power converter for a railroad vehicle includes an air guide duct that takes air from a lateral side of one of a first heat radiating fin and a second heat radiating fin, guides the taken air to a region between the first heat radiating fin and the second heat radiating fin, and then guides the taken air to an end of the other of the first heat radiating fin and the second heat radiating fin in a running direction when the railroad vehicle is running.

Abstract: A power converter for a railway vehicle includes a power converter body configured to be installed on the railway vehicle; a first radiating fin unit arranged on a front side on the power converter body for dissipating heat from the power converter body; a second radiating fin unit arranged on the power converter body on a rear side for dissipating heat from the power converter body; and an air duct that takes in air from a region other than regions in which the first and second radiating fin units are disposed while the railway vehicle is moving, the air duct extending into a fin separation space that is defined as a space between the first radiating fin unit and the second radiating fin unit so as to guide air that is taken in into the fin separation space.

Abstract: An electric power converter includes an inverter, an insulating transformer, and a rectifier. The inverter converts an input DC voltage, supplied from a DC power supply, to an AC voltage outputted at an AC output side of the inverter, and includes at least one semiconductor switching device made of wide bandgap semiconductor material configured to carry out turning-on and turning-off operations at a specified frequency to thereby invert the DC voltage to the AC voltage at the specified frequency; and at least one freewheeling diode made of silicon-based semiconductor material respectively connected to the at least one switching device in inverse parallel.

Abstract: This power conversion device for a railway vehicle includes a first radiation fin radiating heat from a semiconductor device and a second radiation fin arranged at a prescribed interval from the first radiation fin in a traveling direction for radiating heat from the semiconductor device. At least either one of the first and second radiation fins includes an air duct formed by partially not providing a plurality of fin portions.

Abstract: A power converter for a railroad vehicle includes an air guide duct that takes air from a lateral side of one of a first heat radiating fin and a second heat radiating fin, guides the taken air to a region between the first heat radiating fin and the second heat radiating fin, and then guides the taken air to an end of the other of the first heat radiating fin and the second heat radiating fin in a running direction when the railroad vehicle is running.

Abstract: A power converter, including a heat generating element, and a cooler that includes a heat receiving plate, a plurality of cooling fins and a baffle plate. The heat generating element and the plurality of cooling fins are respectively mounted on two different surfaces of the heat receiving plate. Each cooling fin is a plate of a rectangular shape, and the plurality of cooling fins are arranged in parallel to one another, surfaces of any adjacent two of the cooling fins defining a course for cooling air to flow therethrough. The baffle plate is provided across the plurality of cooling fins, and has a substantially rectangular surface in a direction perpendicular to a direction of the courses.