Investigation of Starting Behaviour of a Free-piston Linear Generator

Abidin, Ezrann Zharif Zainal; Ibrahim, Abdulwehab A.; Aziz, A. Rashid A.; Zulkifl, Saiful A.

doi:10.3923/jas.2012.2592.2597

Cited by 16 publications

(3 citation statements)

References 2 publications

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“…In firing mode, piston dynamics are affected by many parameters related to each FPLE's operating and structural characteristics [53,[62][63][64][65][66]. Li et al [62] presented a parametric study of an FPLE under the effects of various intake pressures, moving masses, ignition positions, and resistance loads.…”

Section: Piston Dynamicsmentioning

confidence: 99%

A review of free-piston linear engines

2016

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Section: Piston Dynamicsmentioning

confidence: 99%

A review of free-piston linear engines

2016

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“…At Sandia National Laboratory, an opposed piston FPLG was constructed, which operates using a variety of hydrogen-containing fuels [5][6]. An application involving a dual piston FPLG for hybrid vehicles was successfully implemented at the Petronas University of Technology and Korea Institute of Energy Research [7][8]. The Czech Technical University has also developed a dual piston FPLG.…”

Section: Introductionmentioning

confidence: 99%

Polygonal Tubular Linear Permanent Magnet Generator Analysis and Experimental Test

Arslan

Gürdal

2019

Scientia Iranica

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Free piston generators are of interest due to their efficiency, compact construction, and multiple options for combustion. Much of the research into this type of generator has been facilitated by highly-developed internal combustion engine technology. This study was concerned with the design and application of tubular generator. The design model was developed using the matrix laboratory graphical user interface programming tool, and the designed interface was of the dynamic type. The sizing of the generator was determined in accordance with the main parameters specified via the interface. In addition, as a benefit of using sizing data, the automatic geometry was formed and analyzed using ANSYS Maxwell software. The magnets and the dynamic part of the tubular-structured generator were shaped polygonally. Numerical analyses were made by adopting the finite element method in the software and construction of the prototype model was based on the results from these findings. The generator was excited by use of the crank rod mechanism to imitate the conditions of a functioning free piston mechanism. Current and voltage values were obtained at mechanical frequencies of 10 Hz and 20 Hz, and this data was subsequently analyzed.Global code translation was given in attachment in order to allow communication between the ANSYS Maxwell and MATLAB GUI software.

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“…A considerable number of studies have been performed with the aim of determining the properties of the starting process. Zulkifli and co-workers [23][24][25] at Universiti Teknologi PETRONAS utilized a fixed d.c. bus voltage and open-loop rectangular current commutation to realize reciprocating motion in the starting process, based on the mechanical resonance and the air-spring character of the engine cylinders prior to combustion. The results showed that steady-state operation after the very first cycle is produced when using a fixed-magnitude force.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental investigation into the required minimum starting force for a linear engine–linear generator integrated system

Sun

Wang

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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In this paper the starting process of the linear engine–linear generator integrated system is described, and the required minimum starting force for the linear engine–linear generator integrated system, both with persistent oscillations and also considering the number of starting strokes based on the principle of single-degree-of-freedom damped forced vibrations, is theoretically analysed. The theoretical expression for the required minimum starting force is obtained, as well as the relationship between the minimum starting force and the structural parameters. Bench tests are also conducted to validate the theory. The results show that the required minimum starting force that satisfies persistent oscillations is related to the cylinder bore, the displacement, the moving mass and the friction coefficient. When considering the number of starting strokes, the required minimum starting force is related to the number of starting strokes, the compression energy, the displacement, the moving mass and the friction coefficient. When the number of starting strokes is designated as four, this satisfies the formation of a combustible mixture; the minimum starting force is slightly larger than the value that satisfies persistent oscillations. The consistency between the test results and the theoretical calculations indicates that the theoretical model of the minimum starting force has a certain reference value for the design of a linear engine–linear generator integrated system.

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Investigation of Starting Behaviour of a Free-piston Linear Generator

Cited by 16 publications

References 2 publications

A review of free-piston linear engines

A review of free-piston linear engines

Polygonal Tubular Linear Permanent Magnet Generator Analysis and Experimental Test

Theoretical and experimental investigation into the required minimum starting force for a linear engine–linear generator integrated system

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