资 源 简 介
直流链路和逆变器应用选择电容器的设计考虑
由于功率半导体技术和电路拓扑结构的改进，今天的逆变器和开关电源电路提供增量性能比以往任何时候都。效率有所提高，待机功率的使用以及绿色能源区和物理电路尺寸正在缩小。甚至预期寿命得到了提高。
这种业绩推动的背后是不断变化的应用场景。较小的电源和逆变器更适合消费者和工业产品的萎缩。逆变器，一旦限制在市场范围内，现在在每一个太阳能，风能和水动力系统的核心，以及UPS设备，便携式电源和更多。此外，在许多关键应用中，产品可靠性是最重要的。
虽然大部分归功于这些改进归功于半导体制造商和他们的应用工程师，也有显着的进步电容器技术。多年来，铝电解电容器一直是电源设计的中流砥柱，他们仍然是许多应用的最佳选择。
Although we haven‘t seen any revoluTIonary leaps in aluminum electrolyTIc technology， there has been a lot of technology creep over the years. This creep has made them physically smaller， more reliable and available with lower ESR- and ripple-current raTIngs. The latter two are of parTIcular importance for any power circuit that employs DC link circuitry. Of course， that includes switching power supplies and inverters.
Power metalized film capacitors are advancing even faster than electrolytics. We’ve seen evolutionary improvements in film material， metallization and the overall device construction. While metalized power film and electrolytic capacitors have some application overlap， each has situations in which they are best suited. Furthermore， film capacitors are available in a much broader range of form factors and terminations.
