分析了50kVA并联有源电力滤波器(Shunt Active Power Filter,简称SAPF)基于同步坐标变换的直流侧电压控制模型,并基于控制模型设计出直流侧电压环的PI调节器。为了避免启动时直流侧电压的过冲,采用分3个不同阶段的启动方法完成了直流侧...分析了50kVA并联有源电力滤波器(Shunt Active Power Filter,简称SAPF)基于同步坐标变换的直流侧电压控制模型,并基于控制模型设计出直流侧电压环的PI调节器。为了避免启动时直流侧电压的过冲,采用分3个不同阶段的启动方法完成了直流侧电压的软启动。采用设计的PI调节器来控制SAPF投入运行后的直流侧电压。控制仿真和实验结果均证明了理论分析的正确性和可行性。展开更多
介绍了一种新型零电流开关(Zero Current Switching,简称ZCS)脉宽调制(Pulse Width Modulated,简称PWM)Buck变换器,它能在整个负载范围内实现主开关管和辅助开关管的ZCS以及所有无源功率器件的零电压开关(Zero Voltage Switching,简称Z...介绍了一种新型零电流开关(Zero Current Switching,简称ZCS)脉宽调制(Pulse Width Modulated,简称PWM)Buck变换器,它能在整个负载范围内实现主开关管和辅助开关管的ZCS以及所有无源功率器件的零电压开关(Zero Voltage Switching,简称ZVS)。详细分析了该变换器的工作原理,并通过一台300W,30kHz样机验证了该电路的可行性。展开更多
The conventional inverters have the shortcomings of straightway conduction in transistors and the difficulty of realizing soft swit ̄ching. A novel inverter based on the DC/DC converter topology is presented. The inve...The conventional inverters have the shortcomings of straightway conduction in transistors and the difficulty of realizing soft swit ̄ching. A novel inverter based on the DC/DC converter topology is presented. The inverter is comprised of a combined Buck/Boost DC/DC converter and a bridge circuit. The front stage converter is controlled to output variable DC voltage and the bridge circuit is used to convert the DC voltage to AC output. The energy feedback technology and one circle control scheme are used t...展开更多
A novel resonant dc link soft switching static inverter topology is presented. The soft switching operation principle and pulse width modulation control feature of dc link is analyzed in detail. The discrete pulse c...A novel resonant dc link soft switching static inverter topology is presented. The soft switching operation principle and pulse width modulation control feature of dc link is analyzed in detail. The discrete pulse control strategy of inverter bridge is discussed. The operation characteristics of inverter are analyzed and verified by experiment.展开更多
文摘分析了50kVA并联有源电力滤波器(Shunt Active Power Filter,简称SAPF)基于同步坐标变换的直流侧电压控制模型,并基于控制模型设计出直流侧电压环的PI调节器。为了避免启动时直流侧电压的过冲,采用分3个不同阶段的启动方法完成了直流侧电压的软启动。采用设计的PI调节器来控制SAPF投入运行后的直流侧电压。控制仿真和实验结果均证明了理论分析的正确性和可行性。
文摘介绍了一种新型零电流开关(Zero Current Switching,简称ZCS)脉宽调制(Pulse Width Modulated,简称PWM)Buck变换器,它能在整个负载范围内实现主开关管和辅助开关管的ZCS以及所有无源功率器件的零电压开关(Zero Voltage Switching,简称ZVS)。详细分析了该变换器的工作原理,并通过一台300W,30kHz样机验证了该电路的可行性。
文摘The conventional inverters have the shortcomings of straightway conduction in transistors and the difficulty of realizing soft swit ̄ching. A novel inverter based on the DC/DC converter topology is presented. The inverter is comprised of a combined Buck/Boost DC/DC converter and a bridge circuit. The front stage converter is controlled to output variable DC voltage and the bridge circuit is used to convert the DC voltage to AC output. The energy feedback technology and one circle control scheme are used t...
文摘A novel resonant dc link soft switching static inverter topology is presented. The soft switching operation principle and pulse width modulation control feature of dc link is analyzed in detail. The discrete pulse control strategy of inverter bridge is discussed. The operation characteristics of inverter are analyzed and verified by experiment.