Piezoelectric ceramic acting as inductor for capacitive compensation in piezoelectric transformer

It is found that a piezoelectric plate can serve as an excellent inductive component between its resonant and anti-resonant 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.