Linear alternators (LAs) are widely applied in many energy conversion systems based on pressure waves, to avoid linear to rotary conversion mechanisms. The control of the LA is the key element to maximise the system's electric power and efficiency. However, the LA resonant frequency cannot be accurately controlled by mechanical design due to parameter tolerance. Furthermore, the operating frequency is generally not strictly constant in real-time, making maximum power point tracking (MPPT) hard to achieve. Two MPPT strategies are proposed here to adjust the electronic stiffness amount in real time. They are hereafter referred to as symmetrical signal injection method and electronic stiffness perturbation method. The latter one is selected and validated via simulation studies.

Novel maximum power point tracking strategies for electronically tuned linear alternators

Iacchetti, Matteo F.;
2019-01-01

Abstract

Linear alternators (LAs) are widely applied in many energy conversion systems based on pressure waves, to avoid linear to rotary conversion mechanisms. The control of the LA is the key element to maximise the system's electric power and efficiency. However, the LA resonant frequency cannot be accurately controlled by mechanical design due to parameter tolerance. Furthermore, the operating frequency is generally not strictly constant in real-time, making maximum power point tracking (MPPT) hard to achieve. Two MPPT strategies are proposed here to adjust the electronic stiffness amount in real time. They are hereafter referred to as symmetrical signal injection method and electronic stiffness perturbation method. The latter one is selected and validated via simulation studies.
2019
solar cell arrays
direct energy conversion
maximum power point trackers
photovoltaic power systems
permanent magnet generators
power generation control
novel maximum power point tracking strategies
electronically tuned linear alternators
LAs
energy conversion systems
pressure waves
rotary conversion mechanisms
key element
LA resonant frequency
mechanical design
operating frequency
MPPT strategies
electronic stiffness amount
symmetrical signal injection method
electronic stiffness perturbation method
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1161205
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