Adjusted power of class D‑ZVS resonant inverter controlled by buck converter for LCLC resonant tank

Jirapong Jittakort; Suwat Kitcharoenwat

Adjusted power of class D‑ZVS resonant inverter controlled by buck converter for LCLC resonant tank

Jirapong Jittakort

Suwat Kitcharoenwat

Vol. 23, No. 12, pp. 1907-1918, Dec. 2023

10.1007/s43236-023-00669-1

Ultrasonic cleaning application

Class D-ZVS resonant inverter

Buck converter

Phase lock loop

BVD model

Abstract

This paper presents a modification of class D zero-voltage-switching (D-ZVS) resonant inverter for ultrasonic cleaning applications. The output power is controlled using the adjustable duty of a buck converter. Combined with a phase-locked loop control, the switching frequency of the inverter is automatically adjusted to maintain a lagging phase angle under load–parameter variations during the cleaning process. With the proposed modification, the inverter maintains ZVS throughout the power control range. Moreover, the snubber capacitor connection is used to reduce turn-off losses. The control algorithms are implemented using digital signal processing (TMS320F28335 for buck converter and TMS320F28379D for inverter). The proposed method for a 100-W piezoceramic ultrasonic transducer (PZT) is verified using computer simulation and laboratory experimental results and is found to be more efficient than other methods. The operating frequency and power ranges under investigation are 36.5–36.96 kHz and 15–95 W, respectively.

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Cite this article

[IEEE Style]

J. Jittakort and S. Kitcharoenwat, "Adjusted power of class D‑ZVS resonant inverter controlled by buck converter for LCLC resonant tank," Journal of Power Electronics, vol. 23, no. 12, pp. 1907-1918, 2023. DOI: 10.1007/s43236-023-00669-1.

[ACM Style]

Jirapong Jittakort and Suwat Kitcharoenwat. 2023. Adjusted power of class D‑ZVS resonant inverter controlled by buck converter for LCLC resonant tank. Journal of Power Electronics, 23, 12, (2023), 1907-1918. DOI: 10.1007/s43236-023-00669-1.