Power module assembly and converter

Abstract

The invention discloses a power module assembly and a converter. The power module assembly comprises a power module and a capacitor module, wherein the power module and the capacitor module are configured to be detachably connected; the power module comprises a first busbar, and the first busbar comprises a first connection part and a power installation part connected with the first connection part. The capacitor module comprises a second busbar, and the second busbar comprises a second connecting part and a capacitor mounting part connected with the second connecting part; wherein the first connecting part and the second connecting part extend along a first direction, the power mounting part and the capacitor mounting part extend along a second direction, and the first connecting part and the second connecting part are connected through a fastener. According to the power module assembly provided by the invention, the capacitor module and the power module are designed to be separable, so that the power module which is easy to break down can be conveniently and independently disassembled and maintained. And meanwhile, the busbar of the capacitor module and the busbar of the power module are directly fastened and connected through the connecting part, so that the stray inductance between the busbars is effectively reduced.

Description

technical field [0001] The invention relates to the field of power equipment, in particular to a power module assembly and a converter. Background technique [0002] For the currently used converters, the capacitor module and the power module in the power module assembly are usually designed as an inseparable structure. When the output capacity of the power module components is large, more components such as capacitors and insulated gate bipolar transistors (Insulated Gate Bipolar Transistor, IGBT) are required, so the weight of the power module components is relatively large (the single unit may be heavier than 100kg). When it is necessary to take out the power module assembly from the converter cabinet to replace the failed components, the bulky power module assembly brings great difficulties to the maintenance work. [0003] In addition, in the existing power module components, the consistency of the equivalent commutation path between each of the three-phase power modu...

AI Technical Summary

Problems solved by technology

When it is necessary to take out the power module assembly from the converter cabinet to replace the failed components, the bulky power module assembly brings great difficulties to the maintenance work

[0003] In addition, in the existing power module components, the consistency of the equivalent commutation path between each of the three-phase power modules and the DC capacitor is poor, which makes the difference of the three-phase stray inductance is large, resulting in the ripple current on some DC capacitors. Much larger, thus limiting the output capacity of the entire converter

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