Linear Generator Connected to a Resonance-Rectifier Circuit

Boström, Cecilia; Ekergård, Boel; Waters, Rafael; Leijon, Mats

doi:10.1109/joe.2012.2227552

Cited by 32 publications

(19 citation statements)

References 9 publications

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“…8 The purpose with this paper is to present experimental results that verify that the circuit works as expected, e.g., that resonance can be achieved with the suggested circuit. A single phase linear generator was used in the experiment.…”

supporting

confidence: 52%

Electric resonance-rectifier circuit for renewable energy conversion

Boström

Ekergård

Leijon

2012

Applied Physics Letters

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Variable speed generators are used more frequently for converting the energy from renewable energy sources to electric energy. The power production form a variable speed generator is dependent on the electrical damping of the generator. In this paper, a resonance circuit connected to a direct driven linear generator used for wave energy utilization is investigated. At resonance, the electrical damping in the generator increases which results in an increased power production. The results show that resonance can be achieved with the suggested circuit.

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supporting

confidence: 52%

Electric resonance-rectifier circuit for renewable energy conversion

Boström

Ekergård

Leijon

2012

Applied Physics Letters

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“…Resonance in electrical circuits occurs when the inductive reactance is equal to the capacitive reactance and causes high currents and high voltages if the resistance is low. Previous experiments as well as simulations show that the power absorption can be increased with the resonance rectifier circuit compared to connecting the generator to a passive diode-rectifier [11,36]. Figure 5 shows a single-phase electrical circuit model of the generator connected to the resonance rectifier as well as how the generator was connected during the onshore experiment.…”

Section: Parametermentioning

confidence: 99%

“…A linear generator can take advantage of the heave motion of the wave and therefore linear generators are used in several different wave energy converters [4][5][6][7]. Drawbacks with linear generators for wave power is that they become very large due to the high forces and low velocities [8,9] and that the induced voltage varies in both frequency and amplitude [10][11][12][13]. Another drawback with linear generators is the partial stator overlap that can occur depending on the design [14].…”

Section: Introductionmentioning

confidence: 99%

Partial Stator Overlap in a Linear Generator for Wave Power: An Experimental Study

Frost

Ulvgård

Sjökvist

et al. 2017

JMSE

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This paper presents a study on how the power absorption and damping in a linear generator for wave energy conversion are affected by partial overlap between stator and translator. The theoretical study shows that the electrical power as well as the damping coefficient change quadratically with partial stator overlap, if inductance, friction and iron losses are assumed independent of partial stator overlap or can be neglected. Results from onshore experiments on a linear generator for wave energy conversion cannot reject the quadratic relationship. Measurements were done on the inductance of the linear generator and no dependence on partial stator overlap could be found. Simulations of the wave energy converter's operation in high waves show that entirely neglecting partial stator overlap will overestimate the energy yield and underestimate the peak forces in the line between the buoy and the generator. The difference between assuming a linear relationship instead of a quadratic relationship is visible but small in the energy yield in the simulation. Since the theoretical deduction suggests a quadratic relationship, this is advisable to use during modeling. However, a linear assumption could be seen as an acceptable simplification when modeling since other relationships can be computationally costly.

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“…This kind of linear mechanical input is a typical supplying form of sea waves, that we can obtain in Mediterranean sea, both in power and stroke terms. In this case the scientific literature provides several effective solutions for the power electronic converters [10][11][12][13]. The stator windings have been connected to a 20 Ω resistive load.…”

Section: Developed Simulationsmentioning

confidence: 99%

A Comparison Among Different Kinds of Stator Lamination in Tubular Linear Machines

Cipriani¹,

Corpora²,

Dio³

et al. 2016

PIER M

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Abstract-In this paper the authors perform a comparison among three different stator structures for a Tubular Permanent Magnet Linear Machine. Each structure is characterized by its own lamination which is expected to contribute to the overall performance of the machine. A detailed analysis of the main figures of merit of the three configurations has been carried out in order to identify the configuration with the best characteristics. Significant data such as flux distribution, rated voltage and current, force on the moved and power losses have been compared. The results show that the choice of a mixed stator lamination allows to improve the performance of these machines.

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Linear Generator Connected to a Resonance-Rectifier Circuit

Cited by 32 publications

References 9 publications

Electric resonance-rectifier circuit for renewable energy conversion

Electric resonance-rectifier circuit for renewable energy conversion

Partial Stator Overlap in a Linear Generator for Wave Power: An Experimental Study

A Comparison Among Different Kinds of Stator Lamination in Tubular Linear Machines

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