DC / AC converter using a piezoelectric transformer and piezoelectric transformer

摘要

PURPOSE:To implement a piezoelectric transducer used in a DC/AC converter, by installing input electrodes for generating an acoustic wave and output electrodes for detecting the acoustic wave in a strip shape so as to synchronize a motion of the wave and dividing a part of the strip electrodes and connecting the part in series or parallel. CONSTITUTION:A piezoelectric transducer comprises input electrodes 71a and 71b for generating an acoustic wave by applying a voltage to a piezoelectric plate 73 and output electrodes 72a and 72b for detecting the acoustic wave resonating in the piezoelectric plate 73. While the input electrodes 71a and 71b and the output electrodes 72a and 72b are installed in a strip shape so as to synchronize a motion of the wave, a part of the strip electrodes is divided and is connected in series or parallel. Any electrodes 74a and 74b out of the input and output electrodes are provided in the center, and the other divided electrodes 76a, 76b, 77a and 77b are symmetrically provided at both ends. Also, by installing the input electrodes and the output electrodes on the front and rear sides of the piezoelectric plate, a pair of the input electrodes are installed double and an internal loss of the piezoelectric transducer can be reduced.