An assembly for connecting two drive sides of a drive train of a rail vehicle includes a first drive side having a disc-shaped first coupling body at one end, a second drive side having a disc-shaped second coupling body at one end and a disc-shaped intermediate body disposed between the first coupling body and the second coupling body. The intermediate body is coupled to both the first coupling body and the second coupling body in such a way that a rotational movement of one of the two drive sides is transmitted to the other drive side through the coupled body.

A power conversion apparatus includes: a converter main circuit converting AC power into DC power; an inverter main circuit converting, into AC power, the DC power obtained by conversion by the converter main circuit; and a common cooler cooling first switching elements included in the inverter main circuit and second switching elements included in the converter main circuit. The first switching elements are modularized in units of one or more elements to form first modules. The second switching elements are modularized in units of one or more elements to form second modules. The first and second modules are mounted on a first surface of a base of the cooler. The first modules are arranged in a first direction on the first surface. The second modules are arranged such that two or more second modules are continuously arranged in a second direction orthogonal to the first direction on the first surface.

In order to reduce noise current leaking out from a frame to which semiconductor devices constituting a three-level power conversion circuit are attached to the outside of a power conversion device, the frame to which the semiconductor devices constituting the three-level power conversion circuit with which the power conversion device is equipped are attached is configured to be electrically connected to a neutral point of the three-level power conversion circuit. The noise current leaking out from the frame is thereby drawn back to the neutral point of the three-level power conversion circuit to suppress the flowing out of the noise current to the outside of the power conversion device and reduce the noise current.

In order to reduce noise current leaking out from a frame to which semiconductor devices constituting a three-level power conversion circuit are attached to the outside of a power conversion device, the frame to which the semiconductor devices constituting the three-level power conversion circuit with which the power conversion device is equipped are attached is configured to be electrically connected to a neutral point of the three-level power conversion circuit. The noise current leaking out from the frame is thereby drawn back to the neutral point of the three-level power conversion circuit to suppress the flowing out of the noise current to the outside of the power conversion device and reduce the noise current.

A system for cooling a power generation system of a locomotive. The power generation system includes an alternator and an engine system. The alternator is coupled to the engine system. The engine system comprises one or more components. The system includes a fan providing air flow, a first sensing module to determine a first temperature of the alternator, a second sensing module to determine a second temperature of the one or more components of the engine system, and a controller. The controller regulates the air flow based on the first temperature and the second temperature.

An embodiment of the present invention relates to a method of manufacturing a vehicle body. The method includes coupling a frame assembly to a platform, wherein the platform is in a cambered and unloaded condition, and wherein the frame assembly has a degree of play at coupling points with the platform and securing the coupling points to eliminate the degree of play and thereby to provide substantially zero residual stress in the vehicle body in the cambered condition.

An embodiment of the present invention relates to a method of manufacturing a vehicle body. The method includes coupling a frame assembly to a platform, wherein the platform is in a cambered and unloaded condition, and wherein the frame assembly has a degree of play at coupling points with the platform and securing the coupling points to eliminate the degree of play and thereby to provide substantially zero residual stress in the vehicle body in the cambered condition.

Disclosed is a traction box of a railway vehicle, including: pieces of electric equipment; and a cooling device, including: a first and second fluid circuits, respectively crossing a first and a second heat exchange area with the pieces of electric equipment; and a first and a second of heat exchangers, respectively crossed by the first and the second fluid circuits and allowing heat exchange between the fluid and a first air flow. The fluid circuits include a first common conduit for fluid circulation, crossing the first exchanger, and then connected to the second and to a third parallel conduits, the second conduit belonging to the second fluid circuit and first crossing the second exchanger and then the second heat exchange area.

Disclosed is a traction box of a railway vehicle, including: pieces of electric equipment; and a cooling device, including: a first and second fluid circuits, respectively crossing a first and a second heat exchange area with the pieces of electric equipment; and a first and a second of heat exchangers, respectively crossed by the first and the second fluid circuits and allowing heat exchange between the fluid and a first air flow. The fluid circuits include a first common conduit for fluid circulation, crossing the first exchanger, and then connected to the second and to a third parallel conduits, the second conduit belonging to the second fluid circuit and first crossing the second exchanger and then the second heat exchange area.

A method for operating a cooling system for a vehicle, for example a rail vehicle, may include circulating a coolant in a first cooling circuit and in a second cooling circuit. A first heat source to be cooled may be arranged in the first cooling circuit and a second heat source to be cooled may be arranged in the second cooling circuit. The coolant may be circulated by pumping the coolant in the first cooling circuit via a first pumping device, and pumping the coolant in the second coolant circuit via a second pumping device. The first pumping device and the second pumping device may each be operated in a normal mode. The method may further include cooling the coolant via at least one cooling element arranged in at least one of the first cooling circuit and the second cooling circuit.