Abstract: An arrangement for cooling power semiconductor devices (2) of a converter (1) arranged in a closed casing (3) with the semiconductor devices in a bottom of the casing on top of a heat sink (5) having members (6) for heat exchange extending externally of the casing out from the bottom comprises a channel (8) for conducting a flow of air to pass said members (6) for cooling thereof, in which a first portion (7) of the channel has the casing bottom as a ceiling and receiving said members (6). A fan (9) is located with a suction side connected to the first channel portion (7) to create a flow of air from an inlet (16) from the exterior (19) into the channel while passing the heat sink members. A filter (18) covers the inlet to the channel for removal of dust and debris from air entering the channel from the exterior.

Abstract: An arrangement for cooling power semiconductor devices (2) of a converter (1) arranged in a closed casing (3) with the semiconductor devices in a bottom of the casing on top of a heat sink (5) having members (6) for heat exchange extending externally of the casing out from the bottom comprises a channel (8) for conducting a flow of air to pass said members (6) for cooling thereof, in which a first portion (7) of the channel has the casing bottom as a ceiling and receiving said members (6). A fan (9) is located with a suction side connected to the first channel portion (7) to create a flow of air from an inlet (16) from the exterior (19) into the channel while passing the heat sink members. A filter (18) covers the inlet to the channel for removal of dust and debris from air entering the channel from the exterior.

Abstract: A cooling system for a rail vehicle having an internal combustion engine as a generator of electricity is operative to exchange heat between a cooling fluid circulating in a cooling circuit connected to the internal combustion engine and air located in an underfloor space of the rail vehicle. A heat exchanger and a fan, located in the underfloor space, are fluidly connected to an exhaust in a side skirt depending from a floor of the rail vehicle. The fan is operative to force air from the underfloor space through the heat exchanger and through the exhaust to an ambient space located on an external side of the side skirt.

Abstract: A cooling system for a rail vehicle having an internal combustion engine as a generator of electricity is operative to exchange heat between a cooling fluid circulating in a cooling circuit connected to the internal combustion engine and air located in an underfloor space of the rail vehicle. A heat exchanger and a fan, located in the underfloor space, are fluidly connected to an exhaust in a side skirt depending from a floor of the rail vehicle. The fan is operative to force air from the underfloor space through the heat exchanger and through the exhaust to an ambient space located on an external side of the side skirt.