High-power and high-voltage frequency converter power unit of component type thin-film capacitor

Abstract

The invention discloses a high-power high-voltage frequency converter power unit of a component type film capacitor, which comprises a radiator component shell and a capacitor component shell, a radiator and a rectifier bridge device arranged on the upper part of the radiator are arranged in the radiator component shell , IGBT power devices, fuses, and the positive and negative bus bars of the radiator extending outside the shell of the radiator assembly. The shell of the capacitor assembly is provided with a film capacitor and the positive and negative bus bars of the capacitor extending outside the shell of the capacitor assembly. The film capacitor is connected to the positive and negative bus bars of the capacitor. The shell of the radiator assembly and the shell of the capacitor assembly are connected by a detachable connector. During transportation, the radiator assembly can be disassembled, which is convenient for transportation and easy to install. When a component fails, the radiator component can also be disassembled for separate maintenance, making maintenance more convenient, greatly saving maintenance costs and manpower, and improving product reliability and stability.

Description

Technical field [0001] The invention relates to a frequency converter, in particular to a high-power high-voltage frequency converter power unit of component type film capacitors. Background technique [0002] The power unit of the inverter is the main component of the main circuit of the high-voltage inverter for rectification, filtering and inversion of power electronic devices. If it is applied to a high-power high-voltage inverter, the power unit of the inverter has a large volume and heavy weight. Disadvantages. [0003] At present, the domestic inverter power units all use electrolytic capacitors as the DC support capacitor solution. The electrolytic capacitors have a short lifespan, and the module structure is complex, bulky, heavy, and difficult to install and maintain. At the same time, the inverter power units generally include capacitor components and Regarding the structure and placement of the radiator assembly, whether it is a vertical structure of the capacitor comp...

AI Technical Summary

Problems solved by technology

[0002] The power unit of the inverter is the main part of the main circuit of the high-voltage inverter for rectification, filtering, and inversion by power electronic devices. If it is used in a high-power high-voltage inverter, the power unit of the inverter has a large volume and heavy shortcoming

[0003] At present, the power units of domestic frequency converters all use electrolytic capacitors as the DC support capacitor scheme. The life of electrolytic capacitors is short, the module structure is complex, bulky, heavy, and difficult to install and maintain. At the same time, the power units of frequency converters generally include capacitor components and In terms of structure and placement, the radiator assembly, whether it is a vertical structure with the capacitor assembly and the radiator assembly up and down, or a horizontal structure with the capacitor assembly and the radiator assembly left and right, is a structural form of integral connection design. When the radiator assembly fails, the capacitor assembly and the radiator assembly need to be disassembled and repaired together, which makes maintenance difficult, and it is difficult to transport and install the power unit of the inverter

Images