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Volume 15
Issue 3
10.3390/jlpea15030054
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Article

Class E ZVS Resonant Inverter with CLC Filter and PLL-Based Resonant Frequency Tracking for Ultrasonic Piezoelectric Transducer

by
Apinan Aurasopon
1,
Boontan Sriboonrueng
2,*,
Jirapong Jittakort
2 and
Saichol Chudjuarjeen
3
1
Faculty of Engineering, Mahasarakham University, Mahasakham 44150, Thailand
2
Department of Electrical Engineering, Faculty of Technical Education, Rajamangala University of Technology Thanyaburi, Pathum Thani 12120, Thailand
3
Department of Electrical and Telecommunication, Rajamangala University of Technology Krungthep, Bangkok 10120, Thailand
*
Author to whom correspondence should be addressed.
J. Low Power Electron. Appl. 2025, 15(3), 54; https://doi.org/10.3390/jlpea15030054
Submission received: 15 July 2025 / Revised: 4 September 2025 / Accepted: 16 September 2025 / Published: 22 September 2025
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Abstract

This paper presents a Class E zero-voltage soft-switching (ZVS) resonant inverter integrated with a CLC filter and a digital resonant frequency tracking technique for driving a piezoelectric ceramic transducer (PZT) in ultrasonic cleaning applications. A digital signal processor (DSP) is used to dynamically monitor and adjust the operating frequency in response to slight variations in the cleaning load, employing a phase-locked loop (PLL) control scheme. The proposed method ensures that the inverter maintains ZVS operation across a frequency range from 30.0 kHz to 34.0 kHz, thereby improving energy efficiency and reducing switching losses. The system is capable of delivering a stable power output of 100 W. Both the simulation and experimental results validate the effectiveness of the proposed technique, demonstrating improved performance under varying load conditions. The combination of CLC filtering and frequency tracking offers a compact and robust solution suitable for ultrasonic cleaner systems and similar resonant-load applications.
Keywords: zero-voltage soft switching (ZVS); class E resonant inverter; piezoelectric ceramic transducer (PZT); phase-locked loop (PLL); ultrasonic cleaning system zero-voltage soft switching (ZVS); class E resonant inverter; piezoelectric ceramic transducer (PZT); phase-locked loop (PLL); ultrasonic cleaning system

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MDPI and ACS Style

Aurasopon, A.; Sriboonrueng, B.; Jittakort, J.; Chudjuarjeen, S. Class E ZVS Resonant Inverter with CLC Filter and PLL-Based Resonant Frequency Tracking for Ultrasonic Piezoelectric Transducer. J. Low Power Electron. Appl. 2025, 15, 54. https://doi.org/10.3390/jlpea15030054

AMA Style

Aurasopon A, Sriboonrueng B, Jittakort J, Chudjuarjeen S. Class E ZVS Resonant Inverter with CLC Filter and PLL-Based Resonant Frequency Tracking for Ultrasonic Piezoelectric Transducer. Journal of Low Power Electronics and Applications. 2025; 15(3):54. https://doi.org/10.3390/jlpea15030054

Chicago/Turabian Style

Aurasopon, Apinan, Boontan Sriboonrueng, Jirapong Jittakort, and Saichol Chudjuarjeen. 2025. "Class E ZVS Resonant Inverter with CLC Filter and PLL-Based Resonant Frequency Tracking for Ultrasonic Piezoelectric Transducer" Journal of Low Power Electronics and Applications 15, no. 3: 54. https://doi.org/10.3390/jlpea15030054

APA Style

Aurasopon, A., Sriboonrueng, B., Jittakort, J., & Chudjuarjeen, S. (2025). Class E ZVS Resonant Inverter with CLC Filter and PLL-Based Resonant Frequency Tracking for Ultrasonic Piezoelectric Transducer. Journal of Low Power Electronics and Applications, 15(3), 54. https://doi.org/10.3390/jlpea15030054

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