SPICE modelling of a coupled piezoelectric-bimetal heat engine for autonomous Wireless Sensor Nodes (WSN) power supply

14th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Boughaleb, J.^1,2,4 ; Monfray, S.^1 ; Vine, G.^1 ; Cottinet, P.J.^4 ; Arnaud, A.^1 ; Boisseau, S.^3 ; Duret, A.B.^3 ; Quenard, S.^2 ; Puscasu, O.^1 ; Maitre, C.^1 ; Trochut, S.^1 ; Hasbani, F.^1 ; Di Gilio, T.^1 ; Heinrich, V.^1 ; Urard, P.^1 ; Grasset, J.C.^1 ; Boeuf, F.^1 ; Guyomar, D.^4 ; Skotnicki, T.^1

STMicroelectronics, 850 rue Jean Monet, Crolles

38920, France^1

CEA-LITEN, 17 rue des Martyrs, Grenoble Cedex 9

38054, France^2

CEA-LETI, 17 rue des Martyrs, Grenoble Cedex 9

38054, France^3

LGEF, INSA Lyon, 8 rue de la Physique, Villeurbanne Cedex

69621, France^4

关键词: Autonomous systems;    Conversion mechanism;    Energy Harvester;    Lumped element model;    Piezoelectric generators;    Power management circuits;    SPICE modelling;    Wireless sensor nodes (WSN);   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/557/1/012091/pdf
DOI  :  10.1088/1742-6596/557/1/012091

来源: IOP

【 摘 要 】

This paper deals with an electrical modelling and optimization of a thermal energy harvester dedicated to power autonomous systems. Such devices based on bimetal strips and piezoceramics turn thermal gradients into electricity by a two-step conversion mechanism. This work focuses first on a demonstration of a ST-WSN (GreenNet demonstration platform) supplied by the harvester to validate, for the first time, the harvesters viability. That demonstration focuses attention on the need for an optimized power management circuit for piezoelectric generators able to reach output voltages up to 20 V. The work deals then with the proposal of an equivalent lumped element model of the piezoelectric transducer with its SPICE implementation to enable the optimization of a dedicated power management circuit based on the Pulsed Synchronous Charge Extractor (PSCE). Simulations using the SPICE model and the power management circuit lead to an increased extracted power by 144%.