有源箝位諧振直流環(huán)節(jié)逆變器的控制策略研究

本文介紹了有源箝位諧振直流環(huán)節(jié)逆變器的工作原理，給出了此逆變器在諧振期間的
等效電路及典型的工作波形。通過對其換流過程的分析，提出了采用諧振開關(guān)控制，箝位開關(guān)控制的電流滯環(huán)控制的調(diào)制方式的策略.它具有開關(guān)損耗小，負(fù)載性能好，失真度小等優(yōu)點(diǎn)，可廣泛應(yīng)用于逆變的場合。本文設(shè)計了一臺輸出功率6kW,諧振頻率500KHz 的逆變器，仿真和實(shí)驗(yàn)結(jié)果證明了該控制策略的可行性。
關(guān)鍵詞: 箝位,諧振直流環(huán)節(jié),軟開關(guān),離散脈沖調(diào)制

Abstract: The authors introduce the principle of the active clamped resonant DC link inverter.
Equivalent circuit and typical waveforms are illustrated. By analyzing the process of the inversion, the control strategy of resonant switch and clamped switch modulation with current hysteresis control is discussed. The inverter owes the advantages of low switching loss ,good regulation performance and small distortion, it can be widely used in the situation of inverter. Meanwhile the authors design an inverter which output power is 6kW and resonant frequency is 500KHz. Simulation results verifying the principle of operation are presented and backed up by experiments.
Keywords: Clamped ，Resonant DC link, Soft-switching，Discrete Pulse Modulation