Quota Studentship 2011

Lead Research Organisation: Imperial College London
Department Name: Electrical and Electronic Engineering

Abstract

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Description Key outcomes:
1. Improved power output witout incrteasing material strain
2. Ultra low power control cirtcuits in the uW range capable of fast control of the power hardware and MPPT function
3. Achieveing a power density of twice of what has been reported in the litersture using other piezoelectric charging schemes.
Exploitation Route Elliott ADT, Dicken J, Miller LM, Wright PK, Mitcheson PDet al., 2013, Scheme for improved integration and lifetime for piezoelectric energy harvesters, IEEE Sensors
Elliott ADT, Mitcheson PD, 2012, Implementation of a single supply pre-biasing circuit for piezoelectric energy harvesters, 26th European Conference on Solid-State Transducers (Eurosensors), Publisher: ELSEVIER SCIENCE BV, Pages: 1311-1314, ISSN: 1877-7058
Elliott ADT, Mitcheson PD, 2012, Power Density Improvement of a Piezoelectric Energy Harvester through use of a Micropower Switch-Mode Interface, 11th IEEE Sensors Conference, Publisher: IEEE, Pages: 1882-1885, ISSN: 1930-0395
Elliott ADT, Mitcheson PD, 2012, Implementation of Single Suply Pre-Biasing with Sub-35µW Control Overhead for Piezoelectric Energy Harvesting, PowerMEMS 2012
Elliott ADT, Zhu D, Beeby SP, Mitcheson PDet al., 2012, Multilayer Piezoelectric Energy Harvesting Using Single Supply Pre-biasing for Maximum Power Generation, PowerMEMS 2012
Dicken J, Mitcheson PD, Elliott A, Yeatman EMet al., 2011, Single-Supply Pre-Biasing Circuit for Low-Amplitude Energy Harvesting Applications, PowerMEMS 2011, Pages: 46-49
Dicken J, Mitcheson PD, Elliott A, Yeatman EMet al., 2011, Single-Supply Pre-Biasing Circuit for Low-Amplitude Energy Harvesting Applications, PowerMEMS 2011, Pages: 46-49
Sectors Aerospace, Defence and Marine,Electronics,Energy
 
Description The project concerns the improvementm of the power density of energy harvesting generators for wireless sensor applications using piezoelectric materials. The standard method of increasing the output power of a harvester is to increase its mass and/or volume and to strain the actvie piezoelectric element at increased levels. Increased weight is clearly undesirable for space applications, and increasing the strain will reduce reliability, making this approach equally uindesirable. The approached taken here are therefore to artificially increase the piezoelectric coupling coefficient by prebiasing the piezoelectric capacitance in synchronism with the cantilever to allow power increase without adding weight or reducing reliability.
First Year Of Impact 2012
Sector Aerospace, Defence and Marine,Energy,Environment
Impact Types Economic