Purpose The booster power supply of high-energy photon source is dynamic power supply,and the output is 2-Hz bias sine wave.Current-source rectifier(CSR)topology can achieve the 2-Hz current directly.Methods In order ...Purpose The booster power supply of high-energy photon source is dynamic power supply,and the output is 2-Hz bias sine wave.Current-source rectifier(CSR)topology can achieve the 2-Hz current directly.Methods In order to get the output current and good power factor of the power grid,the algorithm of“indirect current control”is applied.This method needs to measure the voltage of three phases and calculates several certain parameters of the circuit.The control strategy based on the“indirect current control”of the CSR is built in the Simulink simulation environment.Parameters and algorithms are described in detail,and the control block diagram and simulation model are given.Results The control strategy can output the right current and make a good power factor in the side of grid.Conclusions The CSR topology,as a good choice of power supply of accelerator,has a well-researched prospect.展开更多
与传统高压感应电能传输(inductive power transfer,IPT)系统不同,高压输入-低压输出大功率IPT系统面临高降压比实现与二次侧导通损耗过大的核心挑战。为此,提出一种基于串联电容全桥逆变与同步反向耦合倍流整流的双通道IPT拓扑。该拓...与传统高压感应电能传输(inductive power transfer,IPT)系统不同,高压输入-低压输出大功率IPT系统面临高降压比实现与二次侧导通损耗过大的核心挑战。为此,提出一种基于串联电容全桥逆变与同步反向耦合倍流整流的双通道IPT拓扑。该拓扑在实现1/8电压转换比的同时,可将二次侧各线圈电流降至传统全桥整流方案的1/4,显著降低松耦合变压器的设计难度及二次侧线圈导通损耗。在阐述所提拓扑工作原理的基础上,详细开展IPT系统的参数设计与实现方案研究。为验证理论分析的正确性与方案有效性,搭建原理样机并进行实验测试。结果表明,样机实现28 V恒压输出与零相位角(zero phase angle,ZPA)运行,峰值效率达95.3%、满载效率达95%,充分证明了所提拓扑及设计方案的可行性、正确性与先进性。展开更多
针对广泛应用的整流负荷,提出一种直流侧串联型有源电力滤波器(active power filter,APF)。这种DC侧APF串联在整流桥与负载之间,通过产生谐波电压达到补偿谐波源的目的,使电源电流成为与电源电压同频同相的正弦波。与传统的交流侧有源...针对广泛应用的整流负荷,提出一种直流侧串联型有源电力滤波器(active power filter,APF)。这种DC侧APF串联在整流桥与负载之间,通过产生谐波电压达到补偿谐波源的目的,使电源电流成为与电源电压同频同相的正弦波。与传统的交流侧有源电力滤波器相比,有源开关的数量减少了一半,简化了电路结构,降低成本。串联型DC侧APF采用双环控制,电流控制跟踪电源电压变化,电压控制调整APF的能量流向,通过改变APF储能电容电压极性,实现对电感电流的连续可控,从而实现谐波治理。这种控制方法具有结构简单、控制效果好等优点。实验结果验证了文中所得结论。展开更多
文摘Purpose The booster power supply of high-energy photon source is dynamic power supply,and the output is 2-Hz bias sine wave.Current-source rectifier(CSR)topology can achieve the 2-Hz current directly.Methods In order to get the output current and good power factor of the power grid,the algorithm of“indirect current control”is applied.This method needs to measure the voltage of three phases and calculates several certain parameters of the circuit.The control strategy based on the“indirect current control”of the CSR is built in the Simulink simulation environment.Parameters and algorithms are described in detail,and the control block diagram and simulation model are given.Results The control strategy can output the right current and make a good power factor in the side of grid.Conclusions The CSR topology,as a good choice of power supply of accelerator,has a well-researched prospect.
文摘针对广泛应用的整流负荷,提出一种直流侧串联型有源电力滤波器(active power filter,APF)。这种DC侧APF串联在整流桥与负载之间,通过产生谐波电压达到补偿谐波源的目的,使电源电流成为与电源电压同频同相的正弦波。与传统的交流侧有源电力滤波器相比,有源开关的数量减少了一半,简化了电路结构,降低成本。串联型DC侧APF采用双环控制,电流控制跟踪电源电压变化,电压控制调整APF的能量流向,通过改变APF储能电容电压极性,实现对电感电流的连续可控,从而实现谐波治理。这种控制方法具有结构简单、控制效果好等优点。实验结果验证了文中所得结论。
