Novel power conversion unit allowing laminated coating row and composite busbar to be used in hybrid mode

Abstract

The invention relates to a novel power conversion unit allowing a laminated coating row and a composite busbar to be used in a hybrid mode. The problems that for a traditional cable connection mode, external output appearance is messy, capacity expansion is not easy, and layout and connection cannot be achieved when current becomes larger are solved. The novel power conversion unit comprises an air-cooled radiator, a frame, the composite busbar, a mounting plate, three IGBTs, eight support capacitors, three absorption capacitors, three drive circuit boards and two discharge resistors. On the basis of the air-cooled radiator, the multi-busbar laminated modular design is adopted. As the modular design is adopted, space is saved, maintenance and replacement are facilitated, and the maintenance cost is lowered; by the adoption of the multi-type composite busbar combination use technology, the reliability of a main circuit is improved, and the difficulty that a cable detours in a narrow space is completely avoided; besides, since the structure is compact, expansion of higher power is facilitated, and operation loss and the maintenance cost caused by faults can be reduced.

Description

technical field [0001] The invention relates to the field of locomotive AC technology, in particular to a novel power conversion unit in which a laminated spraying bar and a composite bus bar are used in combination. Background technique [0002] With the development of locomotive AC technology, converters using high-power IGBTs as switching elements are increasingly used. In order to facilitate the maintenance of the main circuit, multiple IGBT devices of one main circuit are installed and integrated to form a power module unit. Functions include connection to the main circuit, switch drive control of the device, and heat dissipation. [0003] The auxiliary inverter power unit of the electric locomotive is the core component of the auxiliary power supply system of the locomotive. It takes power from the intermediate DC circuit of the locomotive, and supplies power to the auxiliary electrical equipment of the train after being inverted by the three-phase circuit composed of ...

AI Technical Summary

Problems solved by technology

Solve the following problems: 1) Solve the problems of large stray inductance of the circuit, easy damage of power devices, and poor circuit reliability; 2) Solve the problems of many main circuit cable connections, complex layout, high cost, and unreliable quality; 3) Reduce the size of the system Size, weight, and convenient maintenance of the main circuit

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