大功率充电逆变电源的网侧电流谐波抑制

逆变充电电源改善了充电电源的效率和控制性能,但是却提高了充电电源输入电流的谐波畸变水平。本文分析了充电逆变电源的功率因数和输入电流谐波畸变的关系,提出了一种连续电流输入的功率因数校正电路的方案,其连续的正弦电流输入是通过采用平均电流控制技术实现的。谐波抑制方案的理论分析通过数字仿真结果进行了验证。一台5kW样机的部分试验结果例证了功率因数校正电路的工作过程。

Harmonic Elimination of the Input Current for High Power Charging Inverter

The charging inverter improves the system efficiency and controllability. Their applications, however, increase the harmonic distortion level of the input current. This paper analyses the relationship between the power factor and input current distortion of the inverter power source. A three-phase configuration of a new power factor correct circuit that makes use of continuou sinput current is suggested. Continuous sinusoidal current input is achieved by the average current mode control technique. The theoretical analysis is verified with digitally simulated results. The selected experimental results from labor atory prototype rated at a 5kW which demonstrates the three-phase power factor correct circuit operation are also presented.