压电驱动中的串联电感匹配技术 matching inductance technique of piezoelectric driving.pdfVIP

2006 年 10 月 电 工 技 术 学 报 Vol.21 No.10 第21 卷第 10 期 TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY Oct. 2006 压电驱动中的串联电感匹配技术 250061 摘要 关键词 中图分类号 TM356 TM359.6 Matching Inductance Technique of Piezoelectric Driving Wei Shoushui Shandong University Jinan 250061 China Abstract As a new driving technology, piezoelectric driving has many considerable advantages and has brought widely-attention. But the application is limited because of its lower efficiency and its non-linearity capacitive vibrator. To improve its efficiency by matching between ultrasonic vibrator and its driving circuit, matching principle with a series-inductance was discussed in some papers, but how to settle the value of series-inductance was unknown. The effects of the series-inductance were simulated and discussed in this paper. Smallest phase matching theory was proposed and good experiments performance was achieved. The theory also applies to dynamic matching technique of piezoelectric vibrators. Keywords Piezoelectric driving, ultrasonic piezoelectric vibrator, matching technique, vibrator 配设计成为许多电力电子专家研究的热点 其主要 1 引言 包含以下几个方面 压电驱动是近 30 年来研究应用的一种新型的 1 阻抗匹配 驱动源需要一个最佳的负载 电动转换技术 系统效率一直是其实用化的制约因 才能输出额定功率 这就需要把压电振子的阻抗变 / 素之一 系统效率主要分为压电振子自身效率 驱 换成最佳负载阻抗 驱动电路目前主要采用变压器 动电路效率和压电振子与电路的匹配效率等几方 耦合实现 另外 振子为非纯阻性负载 通常在振 面 其驱动方式主要有两相半桥串联谐振法 谐振 子的输入端并上或串上一个相反的电抗 使换能器 驱动法 电流并联谐振和电压串联谐振 变压器升 变为纯阻或接近纯阻性 压驱动等[1 5] 其中 无变压器的感容谐振形式只 2 调谐匹配