Efficient Gallium Nitride-Based AC-DC Power Conversion Circuits for Information Technology, Electric Transportation and Industrial Applications

消费和工业应用，包括计算机、电动汽车、信息技术服务器和工业电池供电设备，广泛使用电能。电能必须从交流(AC)实用电压(例如120 V)转换为直流(DC)电压(例如48 V和400 V)才能为这些应用供电。这种电压转换使用了高开关频率(例如几十到几百千赫)的AC-DC整流电路。许多转换器组件的尺寸与开关频率成比例减小，因此需要提高开关频率。问题是，电路中的损耗往往与开关频率成比例地增加，这使得AC-DC功率转换电路在较高的开关频率下固有地效率较低。因此，需要新的技术来实现更高的开关频率，同时降低损耗。

Consumer and industrial applications, including computers, electric vehicles, information technology servers and industrial battery powered devices make extensive use of electrical energy. The electrical energy must be converted from the alternating current (AC) utility voltage (e.g. 120 V) to a direct current (DC) voltage (e.g. 48 V and 400 V) to power these applications. High switching frequency (e.g. tens to hundreds of kilohertz) AC-DC rectifier circuits are used for this voltage conversion. The size of many of the converter components reduces proportionately to the switching frequency, so increased switching frequencies are desired. The problem is that losses in the circuits tend to increases proportionally to switching frequency, making the AC-DC power conversion circuits, inherently less efficient at higher switching frequencies. Therefore, new technologies are required to enable higher switching frequencies while reducing losses.