Certain embodiments of the present application relate to a variable frequency drive (VFD) cabin for a pump configuration including a mobile trailer on which the VFD cabin is to be mounted. The VFD cabin generally includes a medium-voltage VFD and a ventilation system. In certain embodiments, the ventilation system is configured to generate an overpressure condition within the cabin to discourage the entry of dust and debris into the cabin. In certain embodiments, one or more components of the medium-voltage VFD are coupled to the floor of the cabin via a vibration damping system. In certain embodiments, the VFD cabin may be directly coupled to a chassis of the mobile trailer without an intervening suspension being provided between the VFD cabin and the chassis.

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.

A power module including a plurality of substrates, a plurality of power devices, and a heat dissipation assembly is provided. The substrates are located on different planes and surround an axis. Each of the substrates extends along the axis. The power devices electrically connected with each other are disposed on the substrates respectively. The heat dissipation assembly is disposed on the substrates and opposite to the power devices. Heat generated from the power devices is transferred to the heat dissipation assembly through the substrates.

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.

An inverter for converting an input-end direct current into an output-end alternating current to be fed into an AC voltage supply system includes a first housing part with direct current connections for receiving direct current lines of a direct current generator, a second housing part with alternating current connections for receiving alternating current lines of an AC voltage supply system, a third housing part for accommodating power-electronics components of a DC voltage converter, and a fourth housing part for accommodating power-electronics components of an inverter bridge circuit. The housing parts each have an essentially planar rear wall and are arranged in such a way that they enclose a cooling-air duct with an essentially rectangular cross section, wherein the first housing part is arranged opposite the second housing part and the third housing part is arranged opposite the fourth housing part. The inverter also includes a heat sink, which has two essentially planar cooling faces opposite one another arranged in the cooling-air duct, wherein the cooling faces are assigned to the rear walls of the third housing part and the fourth housing part and are in thermal contact with power-electronics components arranged in these housing parts.

In a radio frequency (RF) amplifier system and a heat dissipation device thereof, the RF amplifier system includes an RF amplifier and a heat dissipation device. The RF amplifier includes an RF power element. The heat dissipation device includes a heat conduction board, a plurality of heat pipes and fins. The heat conduction board is thermally conductively coupled to the RF power element, and one end of the heat pipe is thermally conductively coupled to the heat conduction board. The fins are arranged in parallel and spaced from each other. The other end of each of the heat pipes is inserted through the fins. The heat of the RF power element is conducted to the heat conduction board and the heat pipe, and then the heat is quickly conducted to the fins to be dissipated away quickly, and the RF power element can quickly reach a stable temperature.

A power electronics cooling system includes a ram air fan with one or more blades and a ram air fan motor connected via an output shaft. The ram air fan draws in air and passes it across a heat exchanger to cool one or more cooling liquids. One or more pumps pressurize and pump the cooling liquids to various electronic components, including one or more motor controllers. The pumps may be mechanically or electrically coupled to the output shaft of the ram air fan, such that the motor of the ram air fan provides energy to the pumps.

Disclosed herein is a cooling system for two-dimensional array power converters. The cooling system includes: a plurality of power converters arranged in two-dimension; a compressor configured to generate compressed air; vortex tubes each installed in the respective power converters, the vortex tubes configured to generate low-temperature air based on compressed air from the compressor; valves installed between the compressor and the vortex tubes; temperature sensors each installed in the respective power converters to measure temperature inside the power converters; and a controller configured to determine whether to supply the low-temperature air into the power converters by using the vortex tubes, based on the temperature measured by the temperature sensors, and to control the valves depending on a result of the determination.

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.

A cabinet air duct, a cabinet assembly and a photovoltaic inverter are provided according to the present application, where the cabinet air duct includes a cabinet and an air duct arranged in the cabinet. The cabinet is provided with an air inlet and an air outlet that are in communication with the air duct. The air inlet is arranged on a first side surface of the cabinet, the air outlet is arranged on a second side surface of the cabinet, and the first side surface and the second side surface are two opposite side surfaces of the cabinet.