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Date of Publication:2022-10-10

Journal:大连理工大学学报

Affiliation of Author(s):电子信息与电气工程学部

Issue:5

Page Number:756-761

ISSN No.:1000-8608

Abstract:Based on the conventional lumped parameter equivalent circuit model, the electrical characteristics of piezoelectric transformers (PTs) in series-parallel connection were analyzed using Y-parameter matrix. The voltage gain, output power and efficiency as function of parameters and the number of connected piezoelectric transformers were derived and simulated. And the electrical characteristics were simulated by using radial-mode vibrating PTs. Two piezoelectric transformers at the voltage gain of 0.0816 with input and output parts isolated were tested. After series-parallel connection the voltage gain was reduced to 0.0406 on the same load of 20 Ω. The computed and experimental results verify the fact that the series-parallel connection of piezoelectric transformers can enhance the voltage step-down ratio. Series-parallel connected piezoelectric transformers can realize voltage step-down.

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