以隔离型对称半桥双向变换器为对象，建立了以原边为参考的4种模式下的简化电路，提出了结合开关函数的状态空间平均模型的建立方法。
For isolated-type symmetry half-bridge bidirectional converter with phase-shifted control, a simplified circuit under 4 modes using the primary windings of transformer as reference object is built.
该文提出一种对称式RCD箝位的倍流整流双管正-反激型直流变换器。
This paper proposes a symmetrical RCD clamp dual switch forward-flyback with current-doubler-rectifier (CDR) converter which adopts the staggered clamp structure with two RCD type circuit.
RCD复位不对称双管正激变换器性能相对最差，结构最简单，成本最低。
Performance of RCD reset asymmetrical dual-switch forward converter is the lowest, the configuration is the simplest and the cost is the lowest.
结果表明，有源箝位不对称双管正激变换器性能最佳，结构最复杂，成本最高。
Results show that performance of active-clamped asymmetrical dual-switch forward converter is the highest, the configuration is the most complex and the cost is the highest.
在非对称输入电压情况下，对基于双空间矢量调制的矩阵变换器的输出电压波形进行了分析，提出了利用时变调制比改善输出电压波形的方法。
The output voltage waveforms of matrix converter which is based on the space vector modulation are analysed under the unbalanced input voltage. A time-variant modulation ratio method is proposed.
在非对称输入电压情况下，对基于双空间矢量调制的矩阵变换器的输出电压波形进行了分析，提出了利用时变调制比改善输出电压波形的方法。
The output voltage waveforms of matrix converter which is based on the space vector modulation are analysed under the unbalanced input voltage. A time-variant modulation ratio method is proposed.
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