基于状态平面模型的多模态恒功率谐振电容器充电电源研究  

Research on Multi-modes Constant Power Control of Resonant Capacitor Charging Power Supply Based on State Plane Model

作　　者：许赟[1] 鲁超 何凯文 李佩臣 张杰[2] XU Yun;LU Chao;HE Kaiwen;LI Peichen;ZHANG Jie(Wuhan National High Magnetic Field Center(School of Electrical and Electronic Engineering,Huazhong University of Science and Technology),Wuhan 430074,Hubei Province,China;Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute,Wuhan 430074,Hubei Province,China)

机构地区：[1]国家脉冲强磁场科学中心(华中科技大学电气与电子工程学院),湖北省武汉市430074 [2]国网电力科学研究院武汉南瑞有限责任公司,湖北省武汉市430074

出　　处：《中国电机工程学报》2020年第7期2349-2357,共9页Proceedings of the CSEE

基　　金：国家重点研发计划项目(2016YFA0401702)。

摘　　要：谐振型电容器充电电源因其高效、高功率密度被广泛应用于脉冲功率领域,其控制方法多为断续模式的恒流控制,控制简单但存在充电速度慢、开关器件应力大的缺点。恒功率控制可以加快充电速度,但电流断续模式(discontinuous conduction mode,DCM)谐振电流峰值大、平均值小,器件应力大;电流连续模式(continuous conduction mode,CCM)充电后期开关频率高,硬关断损耗与干扰严重。为了实现电容器恒功率充电的同时弥补单一CCM或DCM模式充电的不足,该文提出一种新型多模态恒功率控制策略,综合利用CCM电流平均值大、峰值小与DCM开关损耗小的优势。状态平面法便于准确直观分析谐振电路变模式恒功率充电过程,因此文中通过CCM与DCM运行时的状态轨迹推导出恒功率控制模型,设计并实现各充电模态的平滑切换。最后通过实验验证,该多模态恒功率控制策略能够在显著加快充电速度的同时不增加开关器件应力。Resonant capacitor charging power supply(CCPS)is widely used in the field of pulse power due to its high efficiency and power density.The constant current control is mostly adopted under the discontinuous conduction mode(DCM).It’s simple but suffers from slow charging speed and large switching device stress.The constant power control can increase the charging speed.But the average value of resonant current in DCM is small while the peak value is large,hence the device stress is large.The switching frequency is high in later charging stage of continuous conduction mode(CCM),hence the hard turn-off power loss and EMI are serious.In order to realize constant power charging of the load capacitors and make up the shortages of single CCM or DCM charging,a new multi-modes constant power control strategy was proposed.It takes advantages of the large average current and small peak value in CCM and the less switching loss in DCM.The state plane method was convenient to analyze the variable-modes constant-power charging process intuitively and accurately.Therefore,the constant power control model was derived by the state plane trajectory of CCM and DCM.And the smooth conversion of each charging mode was designed and realized.Finally,the experimental results show that the multi-modes constant power control strategy can significantly accelerate the charging speed without increasing the switching device stress.

关 键 词：串联谐振 电容器充电电源 恒功率控制 状态平面模型 

分 类 号：TM46[电气工程—电器]