RESEARCH INITIATION AWARD: Markov Chain Control of Randomized Switching in Power Converters

9410354斯坦科维奇电力电子技术的普遍使用，特别是开关电源转换器的使用，对许多现代技术的成功是普遍、广泛和关键的。目前电源变流器运行的标准做法是基于周期性开关函数的生成。周期性开关策略能效高，但可能需要广泛的滤波，并且由于谐波与机械结构的相互作用，在电机应用中可能会产生过高的噪声。本项目的目的是通过开发电源转换器中随机开关波形的统一设计程序来减轻这些和其他相关影响。该方案的起点是最近提出的一组随机化切换方案，其中具有适当选择的统计特性的随机信号被添加到参考切换函数。然后，随机化在不影响正常操作的情况下改变频率内容。由马尔科夫链控制的开关设计程序的拟议发展将通过在时间域和频率域中实现时间域自适应和波形优化来进一步增强这一方法。新方法对于制造也是实用和有趣的，因为它不需要对现有设备进行任何重大的硬件更改。***

9410354 Stankovic The use of power electronics in general, and of switching power converters in particular, is pervasive, widespread and critical to the success of much of modern technology. Current standard practice in power converters operation is based on the generation of periodic switching functions. Periodic switching policies are energy efficient, but can require extensive filtering, and can produce excessive acoustic noise in motor applications, due to interactions of harmonics with mechanical structures. The purpose of this project is to mitigate these and other related effects through the development of a unified design procedure for randomized switching waveforms in power converters. The starting point for the proposal is a set of recently proposed randomized switching schemes, where a stochastic signal with appropriately chosen statistical properties is added to the reference switching function. Randomization then alters the frequency content without affecting the proper operation. The proposed development of design procedures for switching governed by Markov chains will further enhance this approach by enabling time-domain adaptation and wave-form optimization in both time and frequency domains. The new approach is also practical and interesting for manufacturing, as it does not require any major hardware changes in existing equipment. ***