High-voltage IGBT converter module

Abstract

The invention discloses a high-voltage isolated gate bipolar transistor (IGBT) converter module, which adopts a drawer or vertical structure in which each component is mounted therein in a laminated way. A radiator is arranged at the bottom of the converter module; high-voltage IGBT components are arranged above the radiator and are uniformly arranged on the upper surface of the radiator; a high-voltage low-sensitivity busbar is arranged above the high-voltage IGBT components and is conductively connected with the IGBT components; an alternating current busbar is arranged above the horizontal side of the high-voltage low-sensitivity busbar and is conductively connected with the high-voltage IGBT components; a control box is arranged above the alternating current busbar and is fixed on the radiator; a gate driving power is arranged in a power box beside the control box; and a high-voltage gate driving circuit is arranged in a driving mounting box on the upper layer of the converter module. The converter module is simple in structure, attractive in appearance, safe and reliable, excellent in each performance and good in maintainability and interchangeability, and can meet the high-voltage large power occasions of intercity power train units, maglev trains, locomotives and the like.

Description

technical field [0001] The invention relates to the technical field of power electronic conversion, in particular to a new high-voltage IGBT (Isolated Gate Bipolar Transistor, insulated gate bipolar transistor) traction converter module structure design applied to rail vehicles. Background technique [0002] With the development of AC drive technology, the IGBT converter module, as an important part of the traction converter, is developing in the direction of modularization and serialization, and the application of IGBT converter modules is becoming more and more extensive. Some domestic companies have made relevant attempts, but due to problems such as immature technology, there is a big gap compared with similar foreign products. Therefore, the technical problem of IGBT converter modules has become one of the bottlenecks restricting the development of EMUs in my country. Due to the limitation of power semiconductor technology level and the imperfection of IGBT series and ...

AI Technical Summary

Problems solved by technology

Because the circuit structure and control of the two are different, generally the two cannot be interchanged or the interchangeability is poor;

[0006] (2) It is difficult to increase the power level

Therefore, if you want to increase the power level, you must use the components in series and parallel, which often leads to a large degree of modification in the circuit and structure of the converter;

[0007] (3) Inconvenient installation and maintenance

Due to the lack of modularization and convenience in structural design, many converters bring great inconvenience to installation and maintenance.

It is often necessary to dismantle many other components or components in order to repair one component or component, which not only has a large workload, but also has a serious impact on the reliability and overall life of the system

Because every time it is disassembled, the reliability of the corresponding components will be reduced. For example, the number of plugging and unplugging of general connectors is regulated. After this number is exceeded, the connector will no longer be reliable;

[0008] (4) The component layout is unreasonable and the electrical performance is affected

Due to the low degree of modularization and integration of general converters or the unreasonable layout of components, if low-inductance busbars are not used or related components are arranged too far away, the wiring inductance or line inductance will be too large, which will make the entire converter The electrical performance of the converter is affected, so that the potential of the converter cannot be fully exploited;

[0009] (5) Complex or poor cooling methods

One is directly installed on the IGBT component, so that the drive circuit lead inductance is the smallest, but on the converter module, its detection and maintenance are very difficult

Another way is to install the drive circuit in a space far away from the IGBT components for easy installation and replacement, but this will cause large lead inductance, which is not good for IGBT component drive and affects the safe operation of the converter module;

[0016] (3) Converter modules used for AC drives are generally divided into four-quadrant rectifier modules and inverter modules. Due to their different circuit structures and control methods, they are generally not interchangeable or have poor interchangeability. ;

[0017] (4) Limited by the technical level of power semiconductors, the previously developed series of converter modules mainly use 3300V or 1700V components, and the voltage levels corresponding to the intermediate DC circuit are 1500V and 750V. Therefore, if you want to increase the power level, you must adjust the components For series and parallel use, this often leads to a large degree of modification in the circuit and structure of the converter module, and the reliability is correspondingly reduced;

[0018] (5) Due to the complexity of the circuit and structure, it is very inconvenient to disassemble and install the converter module during inspection and maintenance, and special equipment tools are required for operation

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