Electronic Products Magazine
By David Henderson and Lisa Schaertl, New Scale Technologies
Ultrasonic piezoelectric motors have been around for more than 30 years. Recent innovations have improved the motors’ robustness and manufacturability, in ever smaller sizes. Now these tiny ceramic motors have caught the attention of consumer product designers, as a way to pack more features into tinier products.
This article compares piezo motors to other motor technologies for micro cameras, including miniature electromagnetic motors, voice coil actuators, liquid lenses, and piezo bimorph actuators. It then compares two types of piezo motors that have been commercialized for micro camera applications.