Page 58 - 《应用声学》2021年第3期

第 40 卷 第 3 期 Vol. 40, No. 3
2021 年 5 月 Journal of Applied Acoustics May, 2021

⋄ 研究报告 ⋄

基于级联9电平技术的大功率超声波电源 ∗

周持衡 张长征 † 张维尧

(湖北工业大学 太阳能高效利用及储能运行控制湖北省重点实验室 武汉 430068)

摘要：为了提高超声波电源的输出功率，该文提出了一种基于级联 9 电平技术的大功率超声波电源。电源逆
变部分由两个 H 桥单元级联组成，经过一定的控制策略实现输出电压为 9 电平波形，可以显著提高超声波电
源的输出功率，改善输出电压的波形质量。提出一种电压差法跟踪换能器的谐振频率，只需采样 3 个电压，根
据 3 个电压之间的数值差调节输出频率。通过分析该超声波电源的系统结构、工作原理及控制策略，并进行仿
真实验，验证了该方案的可行性和有效性。
关键词：超声波电源；频率自动跟踪；电压差法；9 电平
中图法分类号: TM46 文献标识码: A 文章编号: 1000-310X(2021)03-0376-07
DOI: 10.11684/j.issn.1000-310X.2021.03.008

High power ultrasonic power supply based on cascaded 9 level technology

ZHOU Chiheng ZHANG Changzheng ZHANG Weiyao

(Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System,
Hubei University of Technology, Wuhan 430068, China)

Abstract: In order to improve the output power of the ultrasonic power supply, this paper proposes a high-
power ultrasonic power supply based on cascaded 9-level technology. The power inverter part is composed of
two H-bridge units cascaded. After a certain control strategy, the output voltage is 9-level waveform, which
can significantly increase the output power of the ultrasonic power supply and improve the waveform quality of
the output voltage. A voltage difference method is proposed to track the resonant frequency of the transducer,
which only needs to sample three voltages and change the output frequency according to the numerical difference
between the three voltages. By analyzing the system structure, working principle and control strategy of the
ultrasonic power supply, and simulation experiments to verify the feasibility and effectiveness of the scheme.
Keywords: Ultrasonic power supply; Automatic frequency tracking; Voltage difference method; 9 level

2020-07-14 收稿; 2020-09-11 定稿
湖北省技术创新专项重大项目 (2019AAA018)
∗
作者简介: 周持衡 (1996– ), 男, 浙江金华人, 硕士研究生, 研究方向: 超声波电源。
† 通信作者 E-mail: longmarch_zhang@163.com