A Method for Parameter Extraction of Piezoelectric Transformers

Bronshtein, S.; Abramovitz, Alexander; Bronshtein, Alexander; Katz, I.

doi:10.1109/tpel.2011.2139225

Cited by 9 publications

(3 citation statements)

References 8 publications

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“…The relative phase of the output voltage in relation to the input voltage is influenced by both the resonance frequency of that transformer and the frequency of the input voltage. 46 As a result, any differences in the resonance frequency between the plasma jets will cause the relative phase of the plasma jets' output to vary. To ensure the plasma jets' relative phase was as intended, their phase was measured by measuring the displacement current formed on auxiliary electrodes positioned outside the shared channel and near each jet.…”

Section: B Piezoelectric Transformers (Pts)mentioning

confidence: 99%

Phase-shifted counterpropagating atmospheric pressure plasma jets: Characterization and interaction with materials

Johnson,

Brown,

Boris

et al. 2024

Journal of Vacuum Science &Amp; Technology B

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This study investigates the interaction between two counterpropagating atmospheric pressure plasma jets when their respective streamer ignition times are varied by introducing a phase difference between the AC waveforms used to generate them. When the plasma jets are driven in phase, the streamers form at approximately the same time, resulting in a dark region between the two jets. As the phase difference increases, this dark region shifts toward one of the electrodes. With a sufficiently large phase difference, this region vanishes, giving rise to a uniform plasma channel spanning the distance between the electrodes. High-speed imaging reveals that the interaction between the streamers within the channel reduces the streamer propagation length at intermediate phase differences. At large phase differences, the propagation distance of each streamer is enhanced due to the absence of the opposing streamer. Increasing the phase from 0° to 160° reduced the power consumption of the two jets by about 10%, while there was no significant change in the electron density or the N2 vibrational/rotational temperature. Finally, we show how phase-shifting enhances the interaction with three-dimensional objects located between the opposing jets, enabling the treatment of 3D substrates.

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Section: B Piezoelectric Transformers (Pts)mentioning

confidence: 99%

Phase-shifted counterpropagating atmospheric pressure plasma jets: Characterization and interaction with materials

Johnson,

Brown,

Boris

et al. 2024

Journal of Vacuum Science &Amp; Technology B

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“…One of the most used PT models is the lumped parameter model [6], [7], [21], [22], [35], which is illustrated in Fig. 2.…”

Section: A Piezoelectric Transformermentioning

confidence: 99%

Forward Conduction Mode Controlled Piezoelectric Transformer-Based PFC LED Drive

Roedgaard

Weirich²,

Andersen

2013

IEEE Trans. Power Electron.

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Abstract-Light-emitting diode (LED) illumination is getting more and more common; as LED's performance is rising, the price is falling and is getting competitive. Some of the challenges of ac mains supplied illumination are the requirement of power factor correction (PFC) and the competitiveness of a low priced market. In this paper, a new forward conduction mode (FCM) control method for piezoelectric transformer (PT)-based power converters is proposed. A PT-based LED drive facilitating passive PFC is developed, utilizing and validating the FCM control method. The drive utilizes an inductorless half-bridge topology and for circuit minimization and simplicity it has no load regulation and has a 100-Hz output modulation. The proposed FCM control method ensures that the PT is operated at its optimal operation frequency, which ensures soft-switching operation and a constant gain. As a result a 6.5-W PT-based PFC LED drive has been developed, supplied from 230-V 50-Hz ac mains, achieving a power factor of 0.96. Index Terms-Forward conduction mode (FCD) control, lightemitting diode (LED), power factor correction (PFC), piezoelectric transformer (PT).

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“…Therefore, this study aims to explore the use of oscillatory, rectilinear motions to achieve electromechanical systems that transfer and convert electrical energy. This concept is the underlying principle utilized by piezoelectric transformers [14,15], which transfer energy between two electrical ports via the vibration of a piezoelectric material.…”

Section: Introductionmentioning

confidence: 99%

Microfabricated electrodynamic transformers for electromechanical power conversion

Cheng¹,

Arnold²

2013

J. Micromech. Microeng.

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This paper presents a compact power electronic device, called an ‘electrodynamic transformer (ET)’, that transfers electrical power between isolated circuits through electrodynamically coupled vibrations of a mechanical beam structure. Background motivating factors are discussed, and an equivalent circuit model of the ET is presented. A microscale (10 mm3) ET is designed, fabricated and characterized, achieving ∼40% maximum efficiency. Taking advantage of the unique circuit topology of the ET equivalent circuit model, a dc/ac power inverter is then implemented with only two external components, a MOSFET and a capacitor.

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A Method for Parameter Extraction of Piezoelectric Transformers

Cited by 9 publications

References 8 publications

Phase-shifted counterpropagating atmospheric pressure plasma jets: Characterization and interaction with materials

Phase-shifted counterpropagating atmospheric pressure plasma jets: Characterization and interaction with materials

Forward Conduction Mode Controlled Piezoelectric Transformer-Based PFC LED Drive

Microfabricated electrodynamic transformers for electromechanical power conversion

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