Interleaved converter legs are typically modulated with individual carriers per leg and phase-shifted pulse width modulation (PS-PWM) as it facilitates current balancing amongst the legs. Phase-disposition PWM (PD-PWM), despite the better harmonic performance, cannot be directly used due to the resulting current imbalance that may damage the converter. This paper addresses the current sharing issue and proposes a sorting algorithm implementation that enables single-carrier PD-PWM technique for interleaved two-level converter legs. An extension of the proposed algorithm through a switching state feedback loop, limiting the average switching frequency, is also developed. In both cases, the output current is of high quality and shared amongst the phase-legs, while the deviation between the phase-leg currents is well regulated. Simulation results demonstrate the general function of method for multiple interleaved legs as well as its current sharing capabilities for high-power applications. Experimental results from a low-power laboratory prototype validate the operation of the proposed approach.

中文翻译：

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用于多个交错电压源转换器桥臂的单载波相位配置 PWM 技术


交错转换器支路通常采用每个支路单独的载波和相移脉宽调制 (PS-PWM) 进行调制，因为它有利于支路之间的电流平衡。相位配置 PWM (PD-PWM) 尽管具有更好的谐波性能，但不能直接使用，因为由此产生的电流不平衡可能会损坏转换器。本文解决了电流共享问题，并提出了一种排序算法实现，该算法实现了交错两电平转换器支路的单载波 PD-PWM 技术。还开发了通过开关状态反馈环路限制平均开关频率的所提出算法的扩展。在这两种情况下，输出电流都是高质量的并且在相脚之间共享，同时相脚电流之间的偏差得到很好的调节。仿真结果证明了该方法针对多个交错支路的一般功能及其针对高功率应用的均流能力。低功耗实验室原型的实验结果验证了所提出方法的操作。