Assisting and train power supply circuit and railway vehicle

Abstract

The invention provides an assisting and train power supply circuit and a railway vehicle. The assisting and train power supply circuit comprises a main transformer, a traction rectifier unit connectedwith the main transformer, and a traction supporting capacitor connected with the traction rectifier unit; the output end of the traction supporting capacitor is sequentially connected with a double-chopping step-down unit, a supporting capacitor, a double-high-frequency inverter unit, a transformer isolation unit and a rectifier unit; and the output end of the rectifier unit is connected with anassisting supporting capacitor and a train power supply supporting capacitor which are mutually connected in series, the train power supply supporting capacitor is connected with a train load, and the assisting supporting capacitor is connected with an assisting load through an assisting inverter unit and a filter unit. According to the assisting and train power supply circuit, the effect of simultaneously supplying power to the train load and the assisting load is achieved, the isolating effect of a circuit is achieved through the transformer isolation unit, miniaturization and weight reduction of a whole circuit system are facilitated, meanwhile, a triangular / star three-phase isolation transformer is not adopted, thus the space is saved, and the weight is reduced.

Description

technical field [0001] The invention relates to the technical field of rail vehicles, in particular to an auxiliary and train power supply circuit and a rail vehicle. Background technique [0002] The current electric locomotive auxiliary circuit and train power supply circuit are completely separated in circuit structure. The auxiliary circuit takes power from the DC link in the middle of the traction circuit. The circuit takes power directly from the secondary winding of the main transformer, and the input is single-phase alternating current. After rectification and voltage stabilization, the direct current is directly output to the subsequent train load circuit. [0003] Specifically, such as figure 1 As shown, a schematic diagram of a power supply circuit in the prior art is provided, wherein the traction rectifier (2), the traction intermediate DC link (3), and the traction inverter (4) form a traction circuit conversion circuit to supply power to traction loads. The ...

AI Technical Summary

Problems solved by technology

[0005] The invention provides an auxiliary and train power supply circuit and a rail vehicle to solve the problems in the prior art that the auxiliary and train power supply cannot be provided simultaneously under the DC power supply system, and the weight and volume are large, which is not conducive to the reduction of electric locomotives and EMUs. heavy problem

Images