A 3.7V-to-1kV Chip-Cascaded Switched-Capacitor Converter with Auxiliary Boost Achieving >96% Reactive Power Efficiency for Electrostatic Drive Applications

📋 论文概要

本文提出一种芯片级联的开关电容变换器，辅助升压技术实现从3.7V电池到1kV高压输出，用于驱动静电和压电执行器。该变换器通过高效无功功率回收，达到>96%的功率效率，解决了微型机器人等领域中极端电压转换和尺寸重量限制的挑战。

💡 主要创新点

• 采用芯片级联(Chip-Cascaded)结构，通过多个IC堆叠实现极高压转换比(3.7V到1kV)。
• 引入辅助升压(Auxiliary Boost)技术，增强输出电压并改善无功功率回收效率。
• 实现>96%的高无功功率效率，有效回收执行器工作所需的CV²fsw无功能量。

🏷 关键词

📄 原文摘要

This work presents a high voltage drive system for electrostatic and piezoelectric (PZT) actuators used for small-scale electromechanical applications, e.g. microrobotics and haptics. Such systems are notoriously challenging due to the need for extreme conversion ratios to reach 100s of volts to kV from system batteries, often with stringent size (<<1cm3) and weight (<<1g) restrictions [1–3]. As typical electrostatic/PZT actuators require significant reactive power (CV2fsw) to drive a bulk dielectric medium, past work [3, 4] has shown a need to efficiently deliver and recover reactive energy to minimize system power loss, significantly improving on hard-switching drivers [1] or unidirectional boost circuits [2]. Shown in Fig. 30.4.1, this work implements a modular/scalable switched capacitor (SC) converter allowing nominally 16-stage reconfigurable series-parallel (SP) chips to be stacked in series voltage domains with low-voltage control signals relayed up the stack

👥 作者与机构

Yanqiao Li, Bahlakoana Mabetha, Jason T. Stauth

Dartmouth College, Hanover, NH