一种断续电流模式的新型高频电流源驱动电路  

A Novel High Frequency Current Source Driver With Discontinuous Current

作　　者：张之梁[1] 李艳楠[2] 徐传岗[1] 

机构地区：[1]江苏省新能源发电与电能变换重点实验室(南京航空航天大学),江苏省南京市210016 [2]中国电子科技集团公司第二十八研究所,江苏省南京市210017

出　　处：《中国电机工程学报》2011年第18期7-13,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51007036);台达电力电子科教发展基金(DREG2010008)~~

摘　　要：随着高频功率变换器开关频率不断提高,其功率器件MOSFET频率相关损耗都大幅增加,特别是开关损耗和驱动损耗。为减小上述损耗,电流源驱动方式被提出。提出一种新型断续电流模式的电流源驱动(current source driver,CSD)电路。相比连续电感电流CSD电路,其最重要的优点是:电流源电感值大为减小(1 MHz开关频率时一般为20 nH,减小约90%)。所提CSD电路具有开关速度快、开关损耗小的优点,同时,通过电流源电感可以回收高频驱动能量。由于所提电路工作在电流断续模式,因此其环流损耗小,且占空比和开关频率变化范围宽。详细分析其工作原理,讨论最优设计,并给出实验结果。The frequency-dependent losses of the power MOSFET are increasing, especially the switching loss and gate drive loss, when the switching frequency of the power converters increases. In order to reduce the mentioned losses, this paper proposed a new current source driver （CSD） with the discontinuous inductor current. Compared to the continuous CSDs, the most important advantage of the proposed CSD is the small inductance （typically, 20 nH at 1 MHz switching frequency）. This translates into the footprint reduction of as much as 90% compared with the continuous CSDs. The proposed CSD can also achieve fast switching speed and reduced switching loss. The gate drive loss can be recovered. Due to the discontinuous current, the circulating loss also is low. In addition, the CSD can achieve wide range operation of duty cycle and switching frequency. The experimental results verified its advantages.

关 键 词：电流源驱动 谐振驱动电路 功率场效应晶体管 电压调整模块 

分 类 号：TM85[电气工程—高电压与绝缘技术]