IGBT converter chopping module

Abstract

The invention provides an IGBT (Insulated-Gate Bipolar Transistor) converter chopping module; all components that constitute the module are mounted in the module in a laminated manner to form a drawer-type structure; through the drawer-type structure, the external size of the module is reduced, and the internal compactness of a frequency converter cabinet can be improved; meanwhile, the IGBT converter chopping module provided by the embodiment of the invention is high in integration level; an IGBT element, a radiator, a low-sensitivity busbar, an AC output busbar, an absorption capacitor, an IGBT driving component, a pulse distribution board, a current sensor and the like are integrated inside the module to form a complete converter unit; when the power needs to be expanded, all that is needed is to increase the number of the converter units and connect input and output ends of a plurality of modules in parallel without changing the internal device parameters, device arrangement and external structure of the modules, so that the complete converter unit can realize power expansion easily.

Description

technical field [0001] The invention relates to the technical field of power electronic equipment, in particular to an IGBT converter chopper module. Background technique [0002] The IGBT converter chopper module is the core unit for the frequency converter to perform the chopping function. When the voltage on the DC bus is higher than the preset upper limit or meets the conditions that require step-down, the chopper module will deliver energy to the braking circuit; when the DC bus voltage drops below the preset lower limit , the chopper module will stop delivering energy to the brake. [0003] The various performances of the IGBT converter chopper module determine the safety performance of the inverter. However, there are some deficiencies in the current widely used IGBT converter chopper modules. [0004] 1. The compact type is not good and takes up a lot of space: the existing chopper modules have a low degree of integration, and some are not integrated. Most of the ...

AI Technical Summary

Problems solved by technology

[0004] 1. The compact type is not good and takes up a lot of space: the existing chopper modules have a low degree of integration, and some are not integrated. Most of the products are individually designed according to the size provided by the customer, and each functional unit is placed separately , the functional units are not well integrated together, which causes the module not only to be too large, but also to affect the electrical performance, heat dissipation performance and structural performance to a certain extent

[0005] 2. Inconvenient installation and maintenance: Due to the lack of modularization and rapidity in structural design of many converters, it brings many difficulties to installation and maintenance. It is often necessary to dismantle many bolts or other parts in order to replace an IGBT converter module. In addition to the heavy workload, it also has a serious impact on the reliability of the system, that is, the overall life

[0006] Third, the secondary design workload is heavy: because the converter module is the basic unit of the converter, the power levels required by different equipment are different, and the existing converters need to be extensively modified according to different power levels. Structural design, circuit design and heat dissipation design

[0007] 4. Difficulty in power expansion: limited by the level of semiconductor technology, if the requirements for higher power are to be met, the components must be used in series and parallel. Changes to meet the requirements of larger capacity

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