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Limiting Integral Loop Digital Control for DC–DC Converters Subject to Changes in Load Current and Source Voltage

机译:受限于负载电流和电源电压变化的DC-DC转换器的限制积分环路数字控制

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摘要

A new digital control technique is proposed to improve the speed of both load current and source voltage transient responses for dc–dc converters operating in continuous conduction mode (CCM). The key structure of the proposed control technique is a combination of a limiting integral loop and related arithmetic operations to produce the desired switching sequence during transient condition. The limiting integral loop is built as a novel structure for capacitor charge balance operation. In contrast to previous approaches, the proposed control technique is valid for three basic converters: 1) buck; 2) boost; and 3) buck–boost. Moreover, since the transient period is forced to be an integer multiple of the switching cycle, the advantage of fixed switching frequency is inherently provided. Simulation and experimental results from a noninverting synchronous buck–boost converter prototype are given to validate the effectiveness of the proposed solution.
机译:提出了一种新的数字控制技术,以提高在连续导通模式(CCM)下工作的dc-dc转换器的负载电流和电源电压瞬态响应的速度。所提出的控制技术的关键结构是有限积分回路和相关的算术运算的组合,以在瞬态条件下产生所需的开关序列。限制积分回路是一种用于电容器电荷平衡操作的新颖结构。与以前的方法相比,所提出的控制技术对三个基本转换器有效:1)降压; 2)提升; 3)降压-升压。此外,由于瞬变周期被迫为开关周期的整数倍,因此固有地提供了固定开关频率的优点。给出了同相同步降压-升压转换器原型的仿真和实验结果,以验证所提出解决方案的有效性。

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