Clock pulse modulation for ripple reduction in buck-converter circuits
Clock pulse modulation for ripple reduction in buck-converter circuits
复制标题
用于减少降压转换器电路中纹波的时钟脉冲调制
DOI：
10.1016/j.chaos.2018.04.015
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Ueta Tetsushi
中科院分区：
文献类型：
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作者：
Ito Daisuke;Asahara Hiroyuki;Kousaka Takuji;Ueta Tetsushi
DC-DC开关变换器由于其非线性和中断特性，经常被视为混合动态系统，表现出复杂的行为。对于同步降压变换器，我们提出了一种方法来控制混沌行为的脉冲频率调制。输入电压、PWM的占空比等直接影响转换器的调节特性，但是PWM的频率由转换器的频率特性确定并且被设置为固定值。所提出的混沌控制方法通过单独轻微扰动脉冲频率来抑制混沌响应，因此我们的方法可以稳定不稳定的周期轨道，而不影响电压调节方案。为了简化反馈控制器，推导了控制增益向量降维的条件。所提出的控制器实现了稳定没有电流传感器。数值仿真和电路实现验证了该方法的有效性。
DC–DC switching converters which are frequently treated as hybrid dynamical systems exhibit complex behavior due to nonlinear and interrupt characteristics. For synchronous buck-converters, we propose a method to control chaotic behavior by pulse–frequency modulation. An input voltage, a duty ratio of PWMs, and so on, affect to the regulation characteristics of converters directly, but a frequency of PWMs is determined by the frequency characteristics of the converter and is set as a fixed value. The proposed chaos-control method suppresses chaotic responses by slightly perturbing the pulse frequency alone, therefore our method can stabilize unstable periodic orbits without influence on the voltage regulation scheme. To simplify the feedback controller, the condition of dimension reduction for the controlling gain vector is derived. The proposed controller achieves the stabilization without a current sensor. Numerical simulation and circuit implementation demonstrate the validity of this method.