摘要
三相整流器作为飞机地面电源的前级为后级电力变换提供稳定的直流母线.飞机地面电源的容量可达100 kVA~200 kVA,传统的二极管整流方案效率低、损耗大、发热量高、散热问题严峻.针对上述问题提出了一种基于电流检测的大功率同步整流控制方案,其中主电路采用多个功率MOSFET并联取代传统的整流二极管.通过分析整流电路各开关器件的通断状态与输入电流的关系,明确各开关器件的动作规律;进一步检测输入三相电流的大小与方向,提出功率MOSFET的同步整流驱动控制方案.然后考虑实际工程应用因素,设计电流回差方案以产生各功率MOSFET的驱动信号,并考虑霍尔器件、采样电路与控制电路的延迟对回差的各阈值进行修正.最后通过Simulink仿真及工程样机实验平台进行验证,结果显示本文所提方案可有效实现MOSFET的同步整流功能,提高了整流电路的效率,降低了系统的热损耗.
The three-phase rectifier serves as the front stage of the aircraft ground power supply and provides a stable DC bus for the power conversion of the rear stage.The capacity of aircraft ground power supply can reach 100 kVA~200 kVA.The traditional diode rectification scheme has low efficiency,large loss,high heat output and severe heat dissipation problems.To solve these problems,a high power synchronous rectifier control scheme based on current detection is proposed,in which multiple power MOSFET are used in parallel to replace the traditional rectifier diode.By analyzing the relationship between the on-off state and the input current of each switching device in the rectifier circuit,the action law of each switching device is defined.Further testing input and three phase current,the size and orientation of the power MOSFET synchronous rectifier control scheme is put forward.Then,considering the practical engineering application factors,the scheme of current backslip is designed to generate the driving signal of each power MOSFET,and the delay of hall device,sampling circuit and control circuit is considered to correct the thresholds of the backslip.Finally,through Simulink simulation and engineering prototype test platform for verification,the results show that the proposed scheme can effectively realize the MOSFET synchronous rectifier function,improve the efficiency of the rectifier circuit,reduce the heat loss of the system.
作者
陈鹏宇
刘宝泉
李启凡
吴泉兵
CHEN Pengyu;LIU Baoquan;LI Qifan;WU Quanbing(College of Electrical and Control Engineering,Shanxi University of Science&Technology,Xi’an Shaanxi 710021,China;Xi’an Ruinuo Aviation Equipment Co.,Ltd.,Xi’an Shaanxi 710117,China)
出处
《电子器件》
CAS
北大核心
2022年第4期798-804,共7页
Chinese Journal of Electron Devices
基金
陕西省重点研发项目(2020GY-042)。
关键词
飞机地面电源
电流检测
同步整流驱动控制
电流回差方案
阈值修正
aircraft ground power supply
current detection
synchronous rectifier drive control
current back difference scheme
threshold correction
