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

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在内的消费者和工业应用广泛使用电能。电能必须从交流（AC）公用电压（例如120 V）转换为直流（DC）电压（例如48 V和400 V）以向这些应用供电。高开关频率（例如，数十到数百千赫兹）的AC-DC整流器电路用于该电压转换。许多转换器部件的尺寸与开关频率成比例地减小，因此期望增加开关频率。问题在于，电路中的损耗倾向于与开关频率成比例地增加，使得AC-DC功率转换电路在较高开关频率下固有地效率较低。因此，需要新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.