Auxiliary inverter

Abstract

The invention discloses an auxiliary inverter which comprises a case, the case is provided with a framework, the framework divides the interior of the case into two fan mounting cavities, two function mounting cavities, an input mounting cavity and an output mounting cavity, the two fan mounting cavities are symmetrically arranged relative to the geometric center of the case, and the two function mounting cavities are symmetrically arranged at oblique angles. The input mounting cavity and the output mounting cavity are symmetrically arranged in an oblique angle mode, fan assemblies are arranged in the fan mounting cavities respectively, functional assemblies and wind scoopers are arranged in the functional mounting cavities respectively, the wind scoopers are matched with the fan assemblies in a one-to-one correspondence mode, an input assembly is arranged in the input mounting cavity, and an output assembly is arranged in the output mounting cavity. Two sets of functional assemblies can be installed on the auxiliary inverter to improve the capacity and meet the use requirement, all the assemblies are compactly arranged on the framework, the space is utilized to the maximum extent, the center of gravity is prevented from shifting, it is ensured that the auxiliary inverter keeps stable on the vehicle body, and it is ensured that airflow in the auxiliary inverter is smooth through the draught fan assembly matched with the wind scooper.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to an auxiliary inverter. Background technique [0002] Auxiliary inverter is an important part of rail transit facilities such as subways. Its main function is to convert high-voltage direct current into three-phase alternating current or low-voltage direct current to provide power for lamps, air conditioners and other equipment on the vehicle, and to charge the battery of the vehicle. [0003] With the development of rail transit technology, the types and quantities of electrical equipment on subway vehicles and other facilities have gradually increased, and the demand for electricity has also continued to increase, and the capacity of the corresponding auxiliary inverters has also increased. There are two commonly used methods to increase the capacity of the auxiliary inverter. One is to expand the size of the auxiliary inverter chassis to arrange more devices in the chassis...

AI Technical Summary

Problems solved by technology

At present, there are two commonly used methods to increase the capacity of the auxiliary inverter. One is to expand the size of the auxiliary inverter chassis to arrange more devices in the chassis, while the conventional chassis mostly use stainless steel or carbon steel square frame. , the frame occupies most of the weight of the box body, so expanding the size of the box will inevitably increase the overall weight and volume of the auxiliary inverter, and the auxiliary inverter is usually installed at the bottom of the car body. The auxiliary inverter is difficult to install stably on the vehicle body, and at the same time, it will adversely affect the operation of the vehicle; another way to increase the capacity of the auxiliary inverter is to install more inverters into the chassis without increasing the size of the chassis. Although the overall volume of the auxiliary inverter will not change greatly, its weight will increase accordingly, and it will also cause the arrangement of components inside the auxiliary inverter to be crowded, hindering the flow of cooling air inside the chassis, which is not conducive to the auxiliary inverter cooler

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