On December 26th, the reporter learned from CRRC Times Electric that the “3600A/4500V Crimp-type IGBT and its key technologies†project led by the company has recently passed the results appraisal organized by the Chinese Institute of Electronics. Through the implementation of this project, the company has developed the world's highest power level crimped insulated gate bipolar transistor (IGBT). It is reported that this is also the first time China has achieved zero breakthrough in crimped IGBT technology.
Crimp type IGBT is the core device in the field of flexible DC transmission. In terms of appearance, devices and thyristors are similar. However, it mainly achieves power capacity by connecting multiple "subunit" components in parallel. The electrical connection between the chip and the electrode is achieved through pressure. Compared with the traditional welding IGBT module, this type of module has the advantages of large capacity, high reliability, short circuit failure mode, and so on.
According to Liu Guoyou, deputy chief engineer of CRRC Times Electric, the 3600A/4500V crimped IGBT module developed this time is the largest device in the market with double-side heat dissipation and long-term stable failure short circuit capability. Its research has “combined†with a large number of U-cell cellular compression-type chips, chip-reinforcement based on low-temperature nanosilver sintering, and large-area square ceramic tube parallel-current-sharing packages and other core technologies, breaking the large-scale parallel pressure of the chip. The pressure balance in the package and the technical difficulties in the current balance achieve a double increase in device characteristics and reliability. The large-capacity pressure-bonded IGBT module has passed the demonstration test of the soft-commutated valve stage of a number of power grid companies and can meet mass production and engineering application requirements. (Reporter Yu Huiyou correspondent Liu Wei)
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