Radial Mode Piezoelectric Transformer Design for Fluorescent Lamp Ballast Applications

Baker, E.; Huang, Weixing; Chen, D.Y.; Lee, F.C.

doi:10.1109/tpel.2005.854068

Cited by 43 publications

(11 citation statements)

References 2 publications

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“…8. 14 The disagreements between measurements and model are 62%, 1%, and 43% at 150, 212 ͑resonant frequency͒, and 280 Hz, respectively, as shown in Fig. There is discrepancy between the model predictions and experimental measurements away from the resonant frequency shown in Fig.…”

Section: B Validation Of the Relationship Between Deflection And Inpmentioning

confidence: 91%

Development of noncontact spring constant measurement and deflection characterization of piezoelectric devices

Cho

Richards

Bahr

et al. 2007

Journal of Applied Physics

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Articles you may be interested inExpression of picogram sensitive bending modes in piezoelectric cantilever sensors with nonuniform electric fields generated by asymmetric electrodes Rev. Sci. Instrum. 81, 125108 (2010); 10.1063/1.3518925 Study on structure optimization of a piezoelectric cantilever with a proof mass for vibration-powered energy harvesting system Application of triangular atomic force microscopy cantilevers to friction measurement with the improved parallel scan method Rev. Sci. Instrum. 80, 023704 (2009); 10.1063/1.3079685 Comparison of different methods to calibrate torsional spring constant and photodetector for atomic force microscopy friction measurements in air and liquid Rev. Sci. Instrum. 78, 093702 (2007); 10.1063/1.2779215 Direct measurement of cantilever spring constants and correction for cantilever irregularities using an instrumented indenter Rev. Sci. Instrum. 78, 063708 (2007);This paper reports methods for measuring the spring constant and modeling the deflection of piezoelectric devices. Because this method uses the equivalent electric circuit of the piezoelectric device and deflection with respect to input voltage, it is a noncontact measurement method. Measurements of the spring constant from the equivalent circuit method and force versus deflection measurements are within 3.3% of each other. An equivalent electrical circuit of the piezoelectric device is also used to provide a model of the relationship between frequency and deflection according to input voltage. Input voltage and power with respect to driving frequency are modeled for a constant mechanical deformation. This model gives an estimation of the required input electrical power to piezoelectric devices for many applications. In order to verify the models, experiments are conducted and the models and experimental results show very good agreement.

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Section: B Validation Of the Relationship Between Deflection And Inpmentioning

confidence: 91%

Development of noncontact spring constant measurement and deflection characterization of piezoelectric devices

Cho

Richards

Bahr

et al. 2007

Journal of Applied Physics

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“…where ϕ i (x) represents the i th mode shape of the piezoelectric transformer and A i (t) represents the specific weighting factor along the i th modal coordinates. Substituting equations (3) and (4) into equation 1, the governing equation can be transferred from a partial differential equation into a set of ordinary differential equations such as…”

Section: Design Of a Modal Electrode For A Rosen-type Piezoelectric Tmentioning

confidence: 99%

A modal actuator-based single-layer piezoelectric transformer for coilless soft switching inverters

Huang¹,

Wu²,

Chen³

et al. 2007

Smart Mater. Struct.

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In this paper, we propose a coilless backlight inverter for LCD TVs. To simplify the manufacturing procedures of the inverter, a single-layer piezoelectric transformer was used as the basis for the development. Traditionally, the input capacitance of a single-layer piezoelectric transformer prevents us from identifying a proper inductor to achieve LC resonance. Without the presence of LC resonance, high-frequency noise within the output signal can be found. The zero-voltage switching technique can be used to adjust the rectified input voltage to become a trapezoidal voltage waveform and thus reduce some of the high-frequency voltage signals amplified from the input voltage waveform. As the presence of this high-frequency voltage waveform will influence the vibration of the Rosen-type piezoelectric transformer, which can lead to a lower energy transfer efficiency and higher temperature rise on the MOSFET, a solution is needed to further enhance the performance of the piezoelectric transformer-based inverter. It can be shown that the above problems can be solved using a quasi-modal surface electrode adopted onto the surface of a piezoelectric transformer. More specifically, modal filtering provided by the surface electrode of the piezoelectric transformer can be shown to facilitate the removal of the inductor and to eliminate the high-frequency noise that cannot be eliminated by a soft switching technique. In addition, the temperature rise of the MOSFET within the driving circuitry can be shown to be improved significantly. The experimental results were found to match well with the theoretical predictions.

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“…The past several decades have witnessed the rapid development of piezoelectric transformers (PTs) because of their distinct advantages, such as high power density [1][2][3], high efficiency, miniaturisation and integration [4], low electromagnetic interference and good electrical isolation [5]. In some specific situations, PTs have become a competitive alternative to conventional electromagnetic transformers, particularly when size, cost and weight are among the critical factors to be considered [6][7][8]. In practical applications, the driving circuit of PT has a determined effect on final performance [9].…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric ceramic acting as inductor for capacitive compensation in piezoelectric transformer

Shao

Zhang

et al. 2015

IET Power Electronics

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It is found that a piezoelectric plate can serve as an excellent inductive component between its resonant and antiresonant frequencies. To compensate for the capacitance of a piezoelectric transformer (PT) at resonance, three piezoelectric plates with different inductances are chosen to match the PT in different exciting power. Experiments demonstrate that a piezoelectric ceramic can mimic an inductor effectively. Compared with the wirewound inductor, the mimic inductor made of piezoelectric ceramic can achieve a better compensation in a large power range to guarantee inductive impedance phase for the PT. With the excellent advantages in terms of compensation, cost and fabrication, ceramic inductor has potential use in PT-based converter of high integration and efficiency without the need for conventional wirewound inductors.

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Radial Mode Piezoelectric Transformer Design for Fluorescent Lamp Ballast Applications

Cited by 43 publications

References 2 publications

Development of noncontact spring constant measurement and deflection characterization of piezoelectric devices

Development of noncontact spring constant measurement and deflection characterization of piezoelectric devices

A modal actuator-based single-layer piezoelectric transformer for coilless soft switching inverters

Piezoelectric ceramic acting as inductor for capacitive compensation in piezoelectric transformer

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