Abstract

Providing high reliability of electric energy converters based on power semiconductor devices (PSDs) is the main goal of designers, manufacturers and users of such devices. There are many factors affecting reliability—namely, the PSD heat dissipation regime determined by the electric and thermal parameters of the devices, magnitude and type of load, and operating environment conditions. In most cases, an increase in the converters’ power is achieved by combining parallel connected semiconductor devices into modules, which gives rise to additional reliability problems for the devises. We propose several solutions to those problems that guarantee safe thermal operation regime of PSDs (transistors) in the modules by choosing proper transistors and discarding potentially unreliable ones according to criteria based on the devices’ thermal properties. A new method is proposed for the rapid assessment of thermal resistance of transistors when integrating them in the power modules.

中文翻译：

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完成阶段提高电能转换器中功率晶体管模块可靠性的方法

摘要

提供基于功率半导体器件（PSD）的电能转换器的高可靠性是此类设备的设计人员，制造商和用户的主要目标。影响可靠性的因素很多，即PSD的散热方式取决于设备的电和热参数，负载的大小和类型以及工作环境条件。在大多数情况下，通过将并联连接的半导体器件组合到模块中，可以增加转换器的功率，这会给设计带来额外的可靠性问题。我们针对这些问题提出了几种解决方案，这些问题可通过选择适当的晶体管并根据基于器件热特性的标准丢弃可能不可靠的晶体管来确保模块中PSD（晶体管）的安全热运行方式。