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Article Dans Une Revue IEEE Transactions on Power Electronics Année : 2019

A new non-isolated low power inductorless piezoelectric DC-DC converter

Résumé

A new non-isolated low-power inductorless piezoelectric resonant converter is presented. The piezoelectric material is used as an energy storage element like an inductance in a classical Buck-Boost power electronic converter. As opposed to most existing piezoelectric converters, the proposed topology enables to dynamically adjust the output power and ratio keeping a high efficiency for a large range of output powers and for a large range of conversion ratios taking advantage of piezoelectric high quality factor and achieving zero voltage switching. A theoretical analysis of the step-up converter using an energetic approach is introduced and enables a fast and reliable pre-design of the piezoelectric component. This analysis is in perfect agreement with the simulation model performed on Matlab/Simulink. For a given piezoelectric resonator both analytical and simulation models provide very high efficiencies for different output powers. The converter is tested experimentally with a 10 V input voltage using the piezoelectric radial resonance mode. An efficiency higher than 98% for a 160 mW power conversion was achieved, decreasing slowly to 78% at 1.4 W. For a large range of voltage gains, the efficiency remains higher than 90% up to an output power of 750 mW. The experimental results are in perfect agreement with the theoretical analysis until 500 mW.
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Dates et versions

hal-02155230 , version 1 (13-06-2019)

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Benjamin Pollet, Ghislain Despesse, François Costa. A new non-isolated low power inductorless piezoelectric DC-DC converter. IEEE Transactions on Power Electronics, 2019, ⟨10.1109/TPEL.2019.2900526⟩. ⟨hal-02155230⟩
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