Reliability analysis and improved design of power electronic converters under extreme working conditions
电力电子变换器在极端工况下的可靠性分析与改进设计

摘要

电力电子变换器在现代能源转换系统中扮演着至关重要的角色，广泛应用于风能、太阳能以及电动汽车等领域。在极端工况下，如高温、强电磁干扰和大电流波动等条件下，变换器的可靠性会显著下降，可能导致设备故障或性能下降。本文针对电力电子变换器在极端工况下的可靠性问题，分析了其失效模式，并提出了改进设计方案。通过优化元器件选择、散热设计及电路保护措施，有效提高了变换器在极端工况下的可靠性。实验验证了提出方案的有效性，结果表明改进后的设计在实际应用中具有更高的可靠性。

Abstract

Power electronic converters play a crucial role in modern energy conversion systems and are widely used in fields such as wind energy, solar energy, and electric vehicles. Under extreme working conditions, such as high temperature, strong electromagnetic interference, and large current fluctuations, the reliability of converters will significantly decrease, which may lead to equipment failures or performance degradation. Aiming at the reliability issues of power electronic converters under extreme working conditions, this paper analyzes their failure modes and proposes an improved design scheme. By optimizing the selection of components, heat dissipation design, and circuit protection measures, the reliability of the converter under extreme working conditions is effectively improved. Experiments verify the effectiveness of the proposed scheme, and the results show that the improved design has higher reliability in practical applications.