Communication Enhancement in Power Electronic Systems by Spectral Nulls

ECS-0621603通过频谱零点增强电力电子系统的通信具有开关功率转换器的电力电子系统产生在电源和负载之间传输的功率脉冲串。这些脉冲的周期性导致电磁干扰（EMI）集中在开关频率的倍数周围的频带中。EMI干扰敏感的通信系统的操作，通常与电力电子系统交织在一起。如果在噪声频谱中开辟出它们的通道，通信将大大改善。具有随机变化的开关频率的脉冲宽度调制已被证明是用于EMI缓解的有效工具。在拟议的工作中，随机率开关策略的电力电子转换器将开发，使频谱零点产生在一个指定的频率，f0，在噪声频谱。在f0处和附近的抑制噪声将导致电力通信传输链路中的高信噪比。智力优点：所提出的方法包括将现有的开关信号斩波为较短的脉冲。将“父”脉冲分解为“子”脉冲增加了信号频谱设计的自由度，使得可以在期望位置放置零值。理论分析，模拟和实验将定义所提出的技术的范围，质量，必要条件和限制。该项目的意义在于联合的方法来通信和功率控制，通常单独对待。更广泛的影响：增强电力电子系统中的通信，并设想在工业，家庭和战争中的广泛应用的开发方法，构成了主要的预期更广泛的影响的研究。在电力电子转换器产生的噪声中雕刻通信信道的想法可能对EMI缓解、功率控制和电力线通信具有广泛的影响。将建立一个实验装置，以加强教学。

ECS-0621603 Communication Enhancement in Power Electronic Systems by Spectral NullsPower electronic systems with switching power converters produce trains of power pulses transmitted between the source and load. Periodicity of these pulses results in electromagnetic interference (EMI) concentrated in frequency bands around multiples of the switching frequency. The EMI disturbs operation of sensitive communication systems, often intertwined with the power electronic systems. Communications would greatly improve if channels for them were carved in the noise spectrum. Pulse width modulation with randomly varied switching frequency has been proven to be an effective tool for EMI mitigation. In the proposed work, random-rate switching strategies for power electronic converters will be developed such that a spectral null is produced at a specified frequency, f0, in the noise spectrum. Suppressed noise at and near f0 would result in a high signal-to-noise ratio in power communication transmission links. Intellectual merit: The proposed approach consists in chopping an existing switching signal into shorter pulses. Decomposition of a "parent" pulse into "children" pulses adds degrees of freedom to the design of frequency spectra of the signal, making it possible to place a null at a desired location. Theoretical analyses, simulations, and experiments will define the scope, quality, necessary conditions, and limitations of the proposed technique. Significance of the project lies in the joint approach to communication and power control, normally treated separately.Broader Impacts: Enhanced communications in power electronic systems, and the envisioned widespread application of the developed methods in industry, household, and warfare, constitute the major expected broader impact of the study. The idea of carving communication channels in the noise generated by power electronic converters may have broad implications on EMI mitigation, power control, and power line communications. An experimental setup to enhance teaching will be setup.