Impact-driven up-conversion in piezoelectric MEMS energy harvesters with pulsed excitation

• The potential of impact-driven frequency up-conversion in a MEMS EH is evaluated using numerical simulations. The investigated design is compared to a conventional cantilever EH in terms of output power and loss rate. The upshifting can lead to significantly increased output power at a similar loss rate but as the time scale for the loss is long, the benefit is limited. This also requires an effective upshifting process. The design of the impact introduces a length scale that must be selected with excitation, gravity, and pre-stress taken into account. This makes this type of EH application-dependent as a non-optimal choice may result in low output power.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Keyword

Frequency converters

Nanotechnology

Energy Harvester

Frequency up conversion

Length scale

Optimal choice

Output power

Piezoelectric MEMS

Pulsed excitation

Up conversion

Energy conversion

Publication and Content Type

ref (subject category)

kon (subject category)