Temperature Management in Advanced Energy Management > 자유게시판

Thermal management has become a crucial aspect of power electronics, as the growing demand for increased power conversion efficiency and lower heat generation of power electronics systems poses significant thermal management challenges. Proper thermal management is essential to maintain the reliability and longevity of power electronics components, as excessive temperatures can lead to component failure and even component degradation.

The main heat sources in power electronics systems are power semiconductor devices, such as power transistors, IGBTs, and MOSFETs, which dissipate heat due to thermal resistance during operation. These devices can reach temperatures significantly above ambient than the ambient temperature due to their small size and high power density.

Thermal management techniques can be broadly classified into two categories: thermally active and passive systems.

Passive thermal management techniques do not require the use of any external power sources or fans. These techniques are relatively simple and cost-effective to implement. Examples of passive thermal management techniques include:

• Heat sinks with thermal interface materials (TIMs) to improve the heat transfer between the power semiconductor devices and the heat sink
  
• Heat pipes, which use a thermal storage material to transfer heat between two points
  
• Thermal interface materials (TIMs) or thermal greases to improve convective heat transfer between components
  
  

Active thermal management techniques, on the other hand, require the use of external power source(s) or fans to actively cool the power electronics system. Examples of active thermal management techniques include:

• Liquid cooling methods that use a heat transfer fluid to dissipate heat
  
• Air-cooled systems that use air currents to transfer heat
  
• Two-phase cooling methods that use a two-stage cooling mechanism to transfer heat away from the power semiconductor devices
  
  

In addition to these techniques, there are also several system design considerations that influence thermal management. Including:

• choosing thermal-friendly order electronic components online
  
• designing components with integrated thermal management
  
• System design: designing the power electronics system to minimize power loss, reduce the number of power conversion stages, and use high-efficiency power conversion techniques can reduce heat generation
  
  

In conclusion, thermal management is a critical aspect of power electronics that requires strategic thermal management approaches. Proper thermal management can significantly improve the reliability and longevity of power electronics systems, making them more high-performance, low-cost, and environmentally sustainable.