Air-cooled axle-controlled traction inversion power unit with double-sided heat dissipation

Abstract

The invention belongs to the technical field of bullet train locomotive traction systems and relates to an air-cooled axle-controlled traction inversion power unit with double-sided heat dissipation.An original mode that a frame control type three-phase inverter circuit is used for pulling three motors is replaced by a mode that a shaft control type three-phase inverter circuit pulls three motors. On the premise that the installation size of an original frame control type traction inversion power unit is met, three three-phase inversion units, a chopping unit and a direct current bus supportcapacitor are integrated on one power module, so that the power conversion function of one three-phase inversion unit and one chopping unit in the original frame control traction inversion power unitis realized, the system redundancy is improved, and the fault resistance is enhanced; and meanwhile, the heat pipe radiators are additionally arranged on the two sides of the main body air duct, so that the double-sided layout mode of the IGBT in one power unit in an air-cooled heat dissipation mode is realized, the heat dissipation of the IGBT is more uniform, the length of the radiators is reduced, the space utilization rate of a locomotive is improved, and finally, the cooling effect of the power unit is improved.

Description

technical field [0001] The invention belongs to the technical field of locomotive traction systems, and relates to an axle-controlled traction inverter power unit of a diesel locomotive, in particular to an air-cooled axle-controlled traction inverter power unit with double-sided heat dissipation. Background technique [0002] At present, the existing AC drive diesel locomotives usually have two power configuration modes: frame control and axle control. The frame control configuration method is that one traction inverter drives all the motors under the corresponding bogie to run. In this power configuration method, the system is greatly affected by the wheel diameter, and the adhesion utilization rate is low. When the inverter fails , the locomotive will lose half of its power, the system has poor anti-failure ability and low redundancy. The shaft control configuration mode is that one inverter alone drives one motor to run. Compared with the frame control configuration mod...

AI Technical Summary

Problems solved by technology

However, due to the space limitation of diesel locomotives, it is impossible to install huge water cooling systems such as cooling towers, and its traction power units often adopt air cooling

The traction inverter power unit that adopts air-cooled heat dissipation method only has the IGBT single-sided layout method, that is, all power devices are arranged on the substrate of a heat sink, the overall structure occupies a large size, and the traction inverter power unit is installed on the side of the air duct. On one side, the cooling air flows through all the power devices from the inlet to the outlet, and the cooling air continuously takes away the heat passing through the devices, the temperature of the air keeps rising, and the heat dissipation effect of the devices at the far end of the inlet is greatly reduced

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