M.-J. Tudor

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This paper investigates how the power generated by electromagnetic based vibrational power generators scales with the dimension of the generator. The effects of scaling on the magnetic fields, the coil parameters and the electromagnetic damping are presented. An analysis is presented for both wire-wound coil technology and micro-fabricated coils.
Developments in ultra low power electronics, RF communications and MEMS sensors in wireless sensor networks has led to the requirement for in-situ power supplies capable of harvesting energy from the environment. This paper is concerned with generators that harvest electrical energy from the kinetic energy present in the sensor nodes environment. These(More)
In this paper we report on the design, simulation and initial results of a microgenerator, which converts external vibrations into electrical energy. Power is generated by means of electromagnetic transduction with static magnets positioned either side of a moving coil located on a silicon structure designed to resonate laterally in the plane of the chip.(More)
This paper reviews kinetic energy harvesting as a potential localised power supply for wireless applications. Harvesting devices are typically implemented as resonant devices of which the power output depends upon the size of the inertial mass, the frequency and amplitude of the driving vibrations, the maximum available mass displacement and the damping.(More)
This paper reports an electromagnetic vibration energy harvester using an improved Halbach array. A Halbach array is a specific arrangement of permanent magnets that concentrates the magnetic field on one side of the array while cancelling the field on the other side to almost zero. Previous research showed that although the Halbach array has higher(More)
In this paper we report on the design, simulation and fabrication of a microgenerator, which converts external vibrations into electrical energy. Power is generated by means of electromagnetic transduction with static magnets positioned either side of a moving coil located on a silicon structure designed to resonate laterally in the plane of the chip.(More)
This paper introduces a voltage multiplier (VM) circuit which can step up a minimum voltage of 150 mV (peak). The operation and characteristics of this converter circuit are described. The voltage multiplier circuit is also tested with micro and macro scale electromagnetic vibrational generators and the effect of the VM on the optimum load conditions of the(More)
This work presents a novel process to fabricate nanostructures for thermoelectric applications by a combination of a traditional silicon microfabrication techniques, electroplating, and submicron ion-track nanolithography. Polyimide (Kapton HN, PI2731), and PMMA (polymethyl methacrylate) were ion-track irradiated and wet etched. Bi2Te3 nanowires (80 and 120(More)
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