Dimensionless parametric analysis of spark ignited freepiston linear alternator. Understanding the alternator four wires connect the alternator to the rest of the charging system. The main components of an alternator are the rotor, the stator, and the rectifying circuit. Request pdf integrated design of linear alternatorengine system for hev. The linear generator can be used to convert human motion energy to. S is used by the regulator to monitor charging voltage at the battery.
Cawthorne, west virginia university freepiston dieselfueled linear alternator for auxiliary power unit applications, 19961999, atkinson, famouri, clark, west virginia. Dimensionless parametric analysis of spark ignited free. Modeling and design analysis of a permanent magnet linear. Study of radial and axial magnets for linear alternatorfree piston engine system, north. Various embodiments of the present invention are directed toward a twopiston linear combustion engine, comprising. A free piston linear generator fplg is an electric generator which. Design optimization of a linear generator with dual. Design and implementation of overcurrent protection relays test bench, khalid daud khattak. Halbach array linear alternator for thermoacoustic engine.
Test results from a high power linear alternator test rig. Dimensionless parametric analysis of s park ignited freepiston linear alternator 277 2. These power electronics use a novel design solution that includes active rectification and power factor control, active ripple suppression, along with. Rerkpreedapong, field analysis and design of a moving iron linear alternator for use with linear engine, master thesis, college of engineering and mineral resources, west virginia. Cooling the integral fan provides effective through cooling of the alternator. Cad design of linear alternatorengine wvu proprietary. Paper series 1999010921 numerical simulation of a twostroke linear engine alternator combination christopher m. Modeling and design analysis of a permanent magnet linear synchronous generator technical report uiucesdl201. Clark at west virginia university wvu established a spark. The freepiston linear generator fplg uses chemical energy from fuel to drive magnets through a stator and converts this linear motion into electric energy. Modeling and control of freepiston generator sciencedirect.
If successful, west virginias project will facilitate development and commercialization of economical, efficient, and durable chp systems for residential use. Researchers at west virginia university have demonstrated a controlled operation of a. This is an electric flashlight which contains a coil and a permanent magnet. Because of its versatility, low weight and high efficiency, it can be used in a wide range of applications, although it is of special interest to the mobility industry as range extenders for electric vehicles. Permanent magnet linear alternator magnetic field analysis. The design and simulation of a twostroke freepiston compression ignition engine for electrical power generation.
Most of the time, it is simpler and more practical to translate linear motion into rotary motion. It consists of the calculation of th e process of scavenging, compression, combustion, expansion and exhaust. The simplest type of linear alternator is the shake flashlight. Geologic controls on mass movement in the new river gorge, west virginia, jonathan william frank remo.
Principle of linear alternator figure 2 is a cross section view of a singleslot singlephase cylindrical permanent magnet linear alternator. Development of resonating tubular oscillating linear alternator and engine. First, the linear alternator is modeled by the fem in the. Development of resonating oscillating linear engine alternator. Freepiston linear alternator fpla which is a freepiston engine coupled to a linear alternator, converting pistons kinetic energy into electricity directly, has attracted considerable. Automatic kinship verification in unconstrained faces using deep learning. While it is correct to say that the basic principles of the alternator are the same today as they were when the first alternator was designed, many specifics of alternator design have changed considerably. Paper series 1999010921 numerical simulation of a twostroke linear enginealternator combination christopher m. The amount of energy required to run a cars electrical system.
Parametric investigation of combustion and heat transfer. This research was conducted under west virginia universitys oscillating linear engine alternator olea project. In this prototype, magnets are part of the moving part. The law of inductions demands high speed for the moveable electrical parts, on the contrary mechanical parts like low sliding speeds to avoid excessive wear. Department of computer science and electrical engineering, west virginia university.
The alternator generates a stronger voltage that builds up after buildup the field is supplied by rectified voltage from stator with brushes. The author suggests that the pole pitch should have the same length as the. Numerical simulation and experimental analysis of freepiston linear alternator, beijing institute of technology, beijing, china. Various design solutions are available depending upon the application.
It contains an electric circuit, and current is induced in the stator circuit by the moving permanent magnets located on the translator. Tyler borysiak, myles moore, alex sklar, joshua lamb, stephen dunn. A linear alternator is a generator that produces alternating current using linear motion, and may not be as common as the rotary alternator that generates ac using rotary motion. West virginia university had already demonstrated stable operation of a spark ignited fpla prototype with bore of 36. Parviz famouri, west virginia university, morgantown, wv. Author links open overlay panel nguyen ba hung ocktaeck lim. Predesign investigation of resonant frequency effects on gas exchange efficiencies of a onekw naturalgas linear engine alternator 2020010488 nima zamani meymian, mahdi darzi, derek johnson, parviz famouri, west virginia university evaluation of ecosystem for. The freepiston linear generator fplg is a novel energy. Analysis of tubulartype linear generator for freepiston. Researcharticle parametric investigation of combustion and heat transfer characteristics of oscillating linear engine alternator meharbade,1 nigeln.
When the appliance is shaken back and forth, the magnet oscillates through the copper coil and induces an electric current. This bridge design manual was prepared by siteblauvelt engineers, inc. Integrated design of linear alternatorengine system for hev. Design optimization of a linear generator with dual halbach array for human motion energy harvesting wenjia zhao, m. Tyler borysiak, myles moore, alex sklar, joshua lamb. Field analysis and design of a moving iron linear alternator for use with linear engine, dulpichet rerkpreedapong. Interesed in practical maximum efficiency of linear alternators.
Field analysis and design of a moving iron linear alternator for use with linear engine dulpichet rerkpreedapong the previous research at west virginia university has developed a permanent magnet linear alternator and linear combustion engine for testing and studying the performance. Finally, it is stated that this thesis solves the problem of developing a linear engine to the point of feasibility. A starting control strategy of singlecylinder twostroke. In the previous design, the generator and engine are designed independently with the only link between the design of the two systems being the stroke length and the estimated speed of oscillation. Effect of allopurinol and hemin on some biological markers of aging in broiler chickens, dinesh singh rathore.
The authors gratefully acknowledge the support of doe arpae for funding this work. Optimization of a brushless permanent magnet linear alternator for use with a linear internal combustion engine, phd dissertation, college of engineering and mineral resources, west virginia university, west virginia, 1999. Modeling and simulation of moving iron linear generator milg. A linear alternator is most commonly used to convert reciprocating i. Because of this linear feature it is possible to couple the motion of the rotor to the reciprocating vertical motion of the ocean waves. By coupling, we can eliminate the use of gearboxes and power take off schemes. Above figure shows the comparison of field analysis between the previous model 2airgaps and the new model 1airgap. The olea is a permanent magnet linear tubular electric machine. For instance, a hydroelectric power plant harnesses energy in the potential energy of stored water.
This manual is intended to be a guide for engineers working on bridge design projects for the wvdoh. Optimization of a brushless permanent magnet linear alternator for use with a linear internal combustion engine, william r. In this research, the manual analysis was used for solving the magnetic field of. The new model has achieved the same level of performance as shown in right figure with only a half mass of magnets by reducing the magnetic resistances due to air gaps. An alternator is a type of alternating current ac electrical generator.
It provides policies, procedures and methods for developing and documenting the design process. Performance comparison of a single cylinder and a dual. This paper focuses on the design issues of a thermoacoustically driven lowcost linear alternator for the score project. This paper describes modeling and control of a freepiston generator fpg.
The principal difference is in how they are used and which direction the energy flows. Design and testing of a novel linear alternator and. Lane department of computer science and electrical. Integrated design of linear alternatorengine system for hev auxiliary power unit. The previous research at west virginia university has developed a permanent magnet linear alternator and linear combustion engine for testing and studying.
The object collides with a linear alternator or generator, such that the magnet. Motoring the linear alternator 820 gram moving mass 7093 hz resonance frequency displacement i. Application of a freepiston generator in a series hybrid vehicle, ldia, 2003 4 waqas m. The advantage of the double halbach array permanent magnet moving coil alternator structure over traditional loudspeaker as a. Rotary linear generator strokerotor generator by physicist wolfhart willimczik. B is the alternator output wire that supplies current to the battery. Bagg, nasa glenn research center, 2 brookpark rd, cleveland, oh 445. Test results from a high power linear alternator test rig arthur g. A linear alternator is essentially a linear motor used as an electrical generator. The stator is the stationary portion of the generator. Field analysis and design of a moving iron linear alternator for use. Xin niu engineering system design lab university of illinois at urbanachampaign august 25, 20 abstract ocean wave energy conversion is a popular research area due to the increasing scarceness of nonrenewable energy resources. Liyan qu a linear generator for human motion energy harvesting is designed and optimized in this study.
Mcdaniel, subhash nandkumar and parviz famouri west virginia university reprinted from. A group of authors from general motors and west virginia. Integrated design of linear alternatorengine system for. Design the alternator is a threephase, 12pole synchronous selfexcited generator with builtin rectifier and regulator and cooled by an external fan. It was funded by doe arpae gensets program to the west virginia university dear0000608. In place of a traditional alternator, this engine drives a permanent magnet linear electric generator. Stirling engine linear alternator generator home power plant. The low speed alternator design will take an alternator, and through a few tweaks of the generator, will be usable for low speed applications. Ig is the ignition input that turns on the alternatorregulator assembly. Dc vs ac dcac field theory electromagnetic induction. Suppose an object with a permanent magnetic attached moves along a linear track with a constant velocity, such that its kinetic energy is 1 joule. The design and simulation of a twostroke freepiston. Graduate theses, dissertations, and problem reports west.
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