Piezoelectric transformer

Utilize heat dissipation to greatly increase the power density of a piezoelectric transformer.

Power density 135W/cm³, increased more than 4 times.

For a good heat transfer, the piezoelectric plate was pressed on an extra smooth copper plate with a proper pressure on the fixed point. They were fixed in an aluminium box. A spring mechanism attached to the box and controlled the applied pressure on the transformer.

The PT with HTE (a spring pressure of 1N) continues to maintain a stable output power density up to 135 W/cm³ with an efficiency of 90.8%.

Publications:

* WW Shao, ZH Feng, JW Xu, CL Pan and YB Liu, “Radiator heightens power density of piezoelectric transformers,” Electronics letters, 46 (25), 2010.