The microGen DC Power Cell combines our MEMS-based piezoelectric vibration energy harvester with a choice of two rectification circuits, which convert the AC output of the harvester to a DC output regulated to 3.3 V. This DC output can then be used to trickle charge a battery, and/or power sensors, actuators, intelligent chips, and radios.
The microGen AC Power Generators are high-Q resonators with a fixed natural resonant frequency. They can be excited to generate power in two different ways:
In Resonant Mode operation, the Power Generator couples directly with a fixed frequency vibration source from the environment that matches the Power Generator resonant frequency. Resonant movement of the cantilever allows a significant amount of power to be generated at fairly low g-levels.
In Impulse Mode operation, the Power Generator reacts to an impact event from the environment, and rings down at its natural frequency, much like a tuning fork or a violin string. If the impacts occur at semi-regular intervals, power is generated. The benefit of Impulse Mode operation is that the harvester does not need to be tuned to a particular frequency. However, the amount of power produced is sensitive to the maximum g-level and shape (FWHM) of the input pulse.
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