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

一般来说，电力电子设备的使用，特别是开关电源转换器的使用，是普遍的，广泛的，对许多现代技术的成功至关重要。 功率转换器操作中的当前标准实践是基于周期性开关函数的生成。 周期性切换策略是节能的，但是可能需要大量的滤波，并且由于谐波与机械结构的相互作用，在电机应用中可能产生过多的声学噪声。 本项目的目的是减轻这些和其他相关的影响，通过开发一个统一的设计程序，随机开关波形的功率转换器。 该建议的出发点是一组最近提出的随机切换方案，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。 随机化然后改变频率内容而不影响正常操作。 建议的开发由马尔可夫链控制的开关设计程序将进一步增强这种方法，使时域适应和波形优化在时域和频域。 这种新方法对于制造业来说也是实用和有趣的，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. ***