有源箝位正激式高频脉冲直流环节逆变器具有优良的综合性能。然而，当输入电源电压或负载大信号瞬变时，有源箝位电路的动态特性严重影响了变压器最大磁化电流和功率开关承受的最大峰值电压。本文采用平均状态轨迹法深入分析了闭环反馈控制、输入电压前馈控制有源箝位正激式高频脉冲直流环节逆变器瞬态大信号特性，获得了瞬态大信号特性与系统控制带宽、箝位支路谐振频率参数间的关系。

A circuit topology family of the voltage mode ACIAC converters with high frequency ac link are proposed. The kind of circuit topologies are constituted of input cycloconverter, high frequency transformer, and output cycloconverter. The bipolarity phase-shifted control strategy and steady principles are deeply investigated. The output characteristics of the converters are given. By using commutation overlap of the output cycloconverter and the polarity selection of the input voltage and the output filtering inductance current, the leakage inductance energy and the output filtering inductance current are naturally commutated, and the surge voltage and the surge current of the cycloconverters are overcome. The converters have the advantages such as simple topology, two-stage power conversions (LFAC/HFAC/LFAC), bi-directional power flow, high frequency electrical isolation, good line current waveform and output voltage waveform, and strong load adapting function. The converters lay key technical foundation on new-type regulated sinusoidal ac power supplies and electronic transformers. The correction and advancement of the converters are well verified by simulation and principle test

首次提出并深入分析研究了一类全数字化技术、与电网电压，n倍频或，n分频信号同步的基准正弦电路，并给出了关键电路参数设计准则与试验结果，试验结果与理论分析一致。该基准正弦电路具有输出正弦电压与电网电压，n频或n分频信号同步、THD小、幅值可调且不受电网电压波动的影响、简单实用、价格低廉等优点，在高频交流环节AC/AC变频变换系统和UPS中具有重要应用价值。

A combined three-phase inverter based on the duty cycle extended active clamp forward mode inverter with high frequency pulse dc link is proposed in this paper. The three phase inverter is constituted of three same single inverter modules. The voltage-mode feed forward control strategy is introduced in the active clamp forward mode high frequency pulse DC link circuit, the three-state discrete pulse modulation (DPM) hysteresis current control strategy is introduced in the inverter. The circuit topology, steady principle, control strategy, load characteristic, criteria for the key circuit parameters of the combined three-phase inverter are deeply investigated. A designed and developed 3kVA 27VDC/200V400HzAC prototype has excellent comprehensive performances such as small bulk, lower weight, high conversion efficiency, high steady precision, wide input voltage range, low THD of output voltage, strong over-load and short-circuit ability, and strong ability with different nature load and unbalanced three-phase load.

该文提出了基于占空比扩展有源箝位正激式高频脉冲直流环节逆变器的组合式三相逆变器电路结构，并对其电路拓扑、稳态原理、三态DPM 电流滞环控制技术、负载特性、关键电路参数设计进行了深入的分析研究。这类组合式三相逆变器，由3个完全相同的单相逆变器模块构成。设计并研制成功的3kVA27VDC/200V400HzAC 组合式三相高频脉冲直流环节逆变器，具有体积重量小、变换效率高、静态精度高、动态响应快、输入电压变化范围宽、输出波形质量高、过载与短路能力强、带三相不平衡负载的能力强等综合性能。