DSM's NA series actuators are direct-drive piezoelectric actuators integrated
into a protective metallic frame. The frame is typically a monolithic piece
of stainless steel or titanium alloy with a flexure-guided expansion component.
The flexure minimizes the resistance that the frame might impart to the piezoelectric
actuation. In addition, the frame can include threaded receiver holes at the
top and bottom or can be modified to provide a flat or hemispherical contact
The frame also includes a mechanical preload that maintains compression on
the piezoelectric ceramic under high tensile forces and ensures successful bi-directional
operation under dynamic operating conditions. The design thus provides increased
resilience to mechanical loads when compared to non-preloaded actuators.
The NA Series designs are well-suited to many applications where high force
and high frequency response are required. Two standard designs, the NA-25 and
the NA-80, offer 25 and 80 mm travel ranges over a control voltage range of
-30 to +150V. The NA architecture can be readily adapted and scaled to other
force and stroke ranges.