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Study on paralleled dc-dc converters with self-organizing function

具有自组织功能的并联DC-DC变换器研究

基本信息

批准号：
17560269
负责人：
SAITO Toshimichi
金额：
$ 2.12万
依托单位：
Hosei University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

项目摘要

Paralleled dc-dc converters are important systems not only for lower-voltage higher-current capability in next generation micro-processors but also as nonlinear dynamical systems having rich interesting phenomena.We have studied such systems with original switching rules based on Winner-Take-All principle.The major results are as the following.1) In order to analyze the system dynamics, the output load is replaced with a constant voltage source and a simple model is introduced. The model is available in the case where the system time constant is sufficiently larger than the clock period. The model has piecewise constant(PWC) vector field and piecewise linear trajectory. The PWC model is well suited for precise analysis.2) In the PWC model of single dc-dc converter, we have clarified parameters condition for stable periodic operation, parameters condition for chaos generation and structure of bifurcation phenomena. In the PWC model of paralleled dc-dc converters, we have clarified parameters condition for stable multiphase operation that is desired for current sharing with low ripple. Bifurcation from the synchronous phenomena to hyperchaos is also analyzed.3) For flexible system operation, we have introduced plural switching strategies depending on both time and state variable. Applying the switching rules appropriately, stable multi-phase synchronization is possible for almost all parameter range. We have designed analog-digital-hybrid circuit to realize the switching rules. Fabricating simple test circuits, typical system operation is confirmed experimentally.

级联型DC-DC变换器不仅是下一代微处理器中的低压大电流系统，而且也是一个具有丰富有趣现象的非线性动力学系统.本文基于Winner-Take-All原则，对具有原始开关规则的级联型DC-DC变换器进行了研究，主要结果如下：1）为了分析系统动力学，用恒压源代替输出负载，并引入了一个简单的模型。该模型适用于系统时间常数比时钟周期大得多的情况。该模型具有分段常数（PWC）矢量场和分段线性轨迹。2）在单DC-DC变换器的PWC模型中，明确了稳定周期运行的参数条件、混沌产生的参数条件和分岔现象的结构。在PWM DC-DC变换器的PWC模型中，阐明了低涟漪均流所需的多相稳定运行的参数条件。同时分析了从同步现象到超混沌的分岔。3）为了系统的灵活运行，我们引入了依赖于时间和状态变量的多种切换策略。适当地应用开关规则，稳定的多相同步是可能的，几乎所有的参数范围。我们设计了模拟数字混合电路来实现开关规则。制作简单的测试电路，典型的系统操作实验确认。