A Smart Load Interface and Voltage Regulator for Electrostatic Vibration Energy Harvester

[摘要] This paper presents a new implementation in ams 0.35μm HV technology of a complete energy management system for an electrostatic vibrational energy harvester (e-VEH). It is based on the Bennet's doubler architecture and includes a load voltage regulator (LVR) and a smart Load Interface (LI) that are self-controlled with internal voltages for maximum power point tracking (MMPT). The CMOS implementation makes use of an energy harvester that is capable of producing up to 1.8μW at harmonic excitation, given its internal voltage is kept within its optimum. An intermediate LI stage and its controller makes use of a high side switch with zero static power level shifter, and a low power hysteresis comparator. A full circuit level simulation with a VHDL-AMS model of the e-VEH presented was successfully achieved, indicating that the proposed load interface controller consumes less than 100nW average power. Moreover, a LVR regulates the buffer and discharge the harvested energy into a generic resistive load maintaining the voltage within a nominal value of 2 Volts.

[发布机构] Sorbonne Universite's, UPMC Univ Paris 06, UMR 7606, LIP6, Paris; F-75005, France^1;Université Paris Est ESYCOM, ESIEE Paris, France^2

[效力级别] 能源学

[关键词] Circuit-level simulation;Energy Harvester;Harmonic excitation;Hysteresis comparator;Internal voltage;Maximum Power Point Tracking;Vibration energy harvesters;Vibrational energies