ICAT Research Activities
Piezoelectric Transformers
In order to replace the conventional coil-type electromagnetic transformers with disadvantages in large size (particularly in height), heavy weight, and generation of magnetic field, we are developing piezoelectric transformers. We have succeeded to demonstrate a drive system for the piezoelectric multilayer actuators for active vibration control (Photo 2) and a drive circuit-integrated ultrasonic motor (Photo 3), using a 100 W level piezo-transformer.
Photo 2: All electric (no magnetic) drive system with a
piezoelectric transformer for driving a piezoelectric
multilayer actuator, which will be applied for adaptive
vibration damping on a helicopter.
Photo 3: Battery-driven ultrasonic motor integrated
with a piezoelectric transformer and
semiconductor operational amplifiers.