Bizim istatistik sonuçlarımız içinde pratik iş onaylama bunu ana neden veri kayıp% 2c donanım arıza ve kesinti süresi is arıza iletişim anahtarlama güç tedarik sistem. Değişim içinde çalışma çevre sıcaklık of the power supply room ilgili ile the working stability and service life of the switching power supply. Bu nedenle, seçme an uygun soğutma yöntem for the power supply can ensure the reliable use of the iletişim güç kaynak.
The main component of the communication switching power supply is a high-frequency switching rectifier, which gradually matures with the development of power electronics theory and technology and power electronic devices. The rectifier using soft switching technology has smaller power consumption, lower temperature, greatly reduced volume and weight, and continuous improvement in overall quality and reliability. But every time the ambient temperature rises by 10 degree , the life of the main power components is reduced by 50 percent . The reason for such a rapid decline in life is due to temperature changes. Fatigue failure caused by various microscopic and macroscopic mechanical stress concentrations, ferromagnetic materials and other components will initiate various types of microscopic internal defects under the continuous action of alternating stress during operation. Therefore, ensuring the effective heat dissipation of the equipment is a necessary condition to ensure the reliability and life of the equipment.
İlişki Arasında Çalışma Sıcaklık ve Güvenilirlik ve Ömür Boyu Güç Elektronik Bileşenler
The güç kaynak is a tür elektrik enerji dönüşüm ekipman. Sırasında the conversion process, it needs to consume some electrical energy, and the electrical energy is converted into heat and release. The stability and aging speed of electronic components are closely related to the ambient temperature. Power electronic components are composed of a variety of semiconductor materials. Beri the loss of power components during operation is disdised by own heat, the thermal cycle of multiple materials with different expansion coefficients will cause very important stress, and may even cause instantaneous fracture, neden the devices the components to fail. If the power element is operationd under anormal temperature conditions for a long time, it will cause fatigue that will lead to fracture. Vadesi to the termal yorgunluk ömrü yarı iletkenlerin% 2c it is gerekli bu onlar çalışmalı in a göreceli kararlı ve düşük sıcaklık aralığı.
At the the same time, rapid cold and heat changes will temporarily produce a semiconductor temperature difference, which will cause thermal stress and thermal shock. To subject the component to thermal-mechanical stress, when the temperature difference is large, it will cause stress cracks in different material parts of the component. premature component failure. Bu ayrıca gerektirir bu güç bileşenler olmalı çalışmalı a göreceli kararlı çalışma sıcaklık aralık, azaltma keskin değişim of sıcaklık, so as to eliminate the impact of thermal stress shock, and ensure the long-state reliable operation of the components.
