To solve the disadvantages of the traditional Z-source inverter(ZSI),this paper investigates a series-type switched-inductor Z-source inverter(SSI-ZSI)topology.It not only preserves the advantages of the traditional Z...To solve the disadvantages of the traditional Z-source inverter(ZSI),this paper investigates a series-type switched-inductor Z-source inverter(SSI-ZSI)topology.It not only preserves the advantages of the traditional ZSI,but also improves the voltage gain.On the condition of the same voltage gain,the capacitor voltage stress is reduced,the soft start characteristic can be achieved and the inverter can be immune to the damage of the inrush current.The circuit structure and operating principle are analyzed in detail;the simulation model and the experimental platform are built.The simulation and experimental results verify the rationality and superiority of the circuit topology.展开更多
In order to avoid the bus voltage spikes caused by leakage inductance endangering the normal operation of the inverter,based on the improved Y-source inverter,the traditional clamping structure and voltage peak absorp...In order to avoid the bus voltage spikes caused by leakage inductance endangering the normal operation of the inverter,based on the improved Y-source inverter,the traditional clamping structure and voltage peak absorption circuit are introduced,and a high step-up and low-voltage stress improved Y-source inverter with the capability of absorbing bus voltage spike is proposed.This topology fully utilizes the structural characteristics of the improved Y-source inverter itself,and further increases the DC-side voltage gain on the basis of ensuring the busbar voltage peak absorption capacity,while reducing the capacitor voltage stress.This paper demonstrates the superiority of the proposed topology over improved Y-source inverter topology by analyzing its working principle and voltage gain,simulation and experiment platform are constructed to perform the circuit simulation and experiment,and the correctness of the theoretical analysis of the proposed inverter and the effectiveness of the busbar voltage peak absorption capacity are verified.展开更多
The paper proposes a novel three-phase voltage-fed quasi-Z-source ac-ac converter topology to overcome the shortcomings of the traditional three-phase AC-AC chopper.The quantitative relationship between the output vol...The paper proposes a novel three-phase voltage-fed quasi-Z-source ac-ac converter topology to overcome the shortcomings of the traditional three-phase AC-AC chopper.The quantitative relationship between the output voltage and duty-ratio is deduced by investigating the topology and operating principle.It can provide buck-boost function,and the output voltage of the circuit can keep stable in the case of voltage sagging.Simulation is performed using the MATLAB software,and the experimental circuit is built based on the simulation results,the simulation and experimental results verify the correctness and feasibility of the proposed ac-ac converter topology.展开更多
文摘To solve the disadvantages of the traditional Z-source inverter(ZSI),this paper investigates a series-type switched-inductor Z-source inverter(SSI-ZSI)topology.It not only preserves the advantages of the traditional ZSI,but also improves the voltage gain.On the condition of the same voltage gain,the capacitor voltage stress is reduced,the soft start characteristic can be achieved and the inverter can be immune to the damage of the inrush current.The circuit structure and operating principle are analyzed in detail;the simulation model and the experimental platform are built.The simulation and experimental results verify the rationality and superiority of the circuit topology.
基金This paper is supported by Key R&D Program(Public Welfare)of Shandong Province(2019GGX103049)Graduate Education High-Quality Course Construction Project of Shandong Province(SDYKC17032).
文摘In order to avoid the bus voltage spikes caused by leakage inductance endangering the normal operation of the inverter,based on the improved Y-source inverter,the traditional clamping structure and voltage peak absorption circuit are introduced,and a high step-up and low-voltage stress improved Y-source inverter with the capability of absorbing bus voltage spike is proposed.This topology fully utilizes the structural characteristics of the improved Y-source inverter itself,and further increases the DC-side voltage gain on the basis of ensuring the busbar voltage peak absorption capacity,while reducing the capacitor voltage stress.This paper demonstrates the superiority of the proposed topology over improved Y-source inverter topology by analyzing its working principle and voltage gain,simulation and experiment platform are constructed to perform the circuit simulation and experiment,and the correctness of the theoretical analysis of the proposed inverter and the effectiveness of the busbar voltage peak absorption capacity are verified.
文摘The paper proposes a novel three-phase voltage-fed quasi-Z-source ac-ac converter topology to overcome the shortcomings of the traditional three-phase AC-AC chopper.The quantitative relationship between the output voltage and duty-ratio is deduced by investigating the topology and operating principle.It can provide buck-boost function,and the output voltage of the circuit can keep stable in the case of voltage sagging.Simulation is performed using the MATLAB software,and the experimental circuit is built based on the simulation results,the simulation and experimental results verify the correctness and feasibility of the proposed ac-ac converter topology.
