Integrated gate turn-off thyristor three-level power module

Abstract

The invention relates to an integrated gate turn-off thyristor three-level power module, which comprises a metal frame body and is characterized in that the metal frame body is internally provided with a first power string, a second power string and a third power string which are isolated from the metal frame body in an insulated mode, and the first power string, the second power string and the third power string are connected with the metal frame body in a fastening mode through press-fitting fasteners at the top part of the metal frame body; the first power string comprises four groups of gate turn-off thyristor bodies which are sequentially distributed in the vertical direction; the second power string comprises four groups of anti-parallel flywheel diodes; and the third power string comprises an upper absorption diode, an upper clamping diode, a lower clamping diode, an upper absorption capacitor body, a lower absorption capacitor body and a lower absorption diode. The integrated gate turn-off thyristor three-level power module is compact in structure, capable of bearing high voltage and high current, low in loss, high in switching frequency, wide in application range, safe and reliable.

Description

technical field [0001] The invention relates to a power module, in particular to a three-level power module with an integrated gate turn-off thyristor, which belongs to the technical field of high-power electric electronic transmission. Background technique [0002] In the medium and small power converters, low-power power electronic devices are used, the margin of the devices can be selected very high, the failure rate is low, and the reliability of the whole system is high. However, due to the simultaneous presence of high voltage and high current in large-capacity converters, the capability of power devices is insufficient, the influence of stray parameters is large, the heat of devices is large, and the heat dissipation design is difficult, which greatly increases the difficulty of designing and using high-power converters. . At present, high-power converters are still dominated by the products of foreign monopoly companies. The domestic technology base is weak, and its...

AI Technical Summary

Problems solved by technology

However, due to the simultaneous presence of high voltage and high current in large-capacity converters, the capability of power devices is insufficient, the influence of stray parameters is large, the heat of devices is large, and the heat dissipation design is difficult, which greatly increases the difficulty of designing and using high-power converters.

At present, high-power converters are still dominated by the products of foreign monopoly companies. The domestic technology base is weak, and its core is the lack of compact and reliable components such as high-power devices, freewheeling diodes, snubber circuits, radiators, and busbars. Combined together, the ability to design an overall power module

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