Design and Optimization of Tube Type Interior Permanent Magnets Generator for Free Piston Applications (original) (raw)

Linear Permanent Magnet Electric Generator for Free Piston Engine Applications

As a response to the major climatic changes due to global warming and the foreseen oil shortages once the natural reserves will perish, most vehicle manufacturers began research programs on alternative fuel vehicles. The Hybrid Electric Vehicles, as an intermediate step to full electric vehicles, can incorporate Free Piston Engine – Linear Electric Generator systems to produce the required electric energy. A novel six-side, 3 phase, linear generator with permanent magnets on the translator is proposed. For designing the generator a different approach is used: geometric dimensions and electric parameters are determined based on an Equivalent Magnetic Circuit implemented in National Instruments' LabVIEW. Based on these values a three dimensional finite elements analysis model of the linear generator is created to validate the method. Index Terms—permanent magnet machines, linear electric generators, free piston engine

A Review of the Design and Control of Free-Piston Linear Generator

Energies, 2018

The Free-piston linear generator (FPLG) is a novel energy converter which can generate electrical energy and is regarded as a potential technology for solving the restriction of the short driving range of electric vehicles. Getting rid of the crank and flywheel mechanism, FPLG obtains some advantages of a variable compression ratio, compact size, and highly-efficient power generation. Linear electric machine (LEM) design and piston motion control are two key technologies of FPLG. However, they are currently the main obstacles to the favorable performance of FPLG. LEM being used to drive the piston motion or generate electric energy is an integrated design including a motor/generator. Various types of LEMs are investigated, and suitable application scenarios based on advantages and disadvantages are discussed. The FPLG’s controller is used to ensure stable operation and highly-efficient output. However, cycle-to-cycle variations of the combustion process and motor/generator switching...

A Review on Electromagnetic Piston

The main objective of this project to design and construct an electrically operated engine i.e. Electromagnetic engine. this engine is totally different from ordinary IC engine, because of the inventory advancement in operating principals. We have changed the operating principle of IC engine by using the electromagnetic effect instead of combustion of fossil fuels. This engine works on the principle of magnetic repulsion between two magnets. This electromagnetic engine consists of two magnets, one of them is an Electromagnet and other one is a Permanent Magnet. Permanent Magnet acts as piston and Electromagnet is located at the top of the cylinder instead of spark plug and valve arrangement in IC Engines. In this way this engine does not contain any spark plug and fuel injection system. The Electromagnet is energized by a battery source of suitable voltage and when the electromagnet attract the piston, spring get compressed and it will repel the permanent magnet which is attached to the piston head. i.e. piston from TDC to BDC, which will result in the rotary motion of crank shaft. When the piston is at BDC the supply of Electromagnet is discontinued, the permanent magnet which was repelled to BDC will come back to its initial position i.e. TDC. This procedure completes one revolution of crank shaft i.e. our output work. A copper winding is also wound to the cylinder block to get additional power to the piston to reciprocate. This winding is connected to a battery to create a magnetic field inside the cylinder and reciprocate permanent magnet piston on basis of repulsion forces created by winding. The total power supplied by battery will be just to fulfil the copper losses of winding and power required to magnetize the windings.

Interior Permanent Magnet Generator: Generator of New Millennium

2005

The rapid development in the field of permanent magnet material has rekindled interest inthe permanent magnet electrical machines. In the last couple of decades, the price of high densitypermanent magnet has come down to an affordable level. The availability of the material likeNeodymium-iron-Boron (NdFeB), has improved the characteristics of many permanent magnetmachines such as Brushless DC machine, Permanent magnet synchronous machine, Switch reluctancemachine etc. Due to decreasing natural resources, conservation of energy has become one of themost important aspects of our time. It has been proven time and again that higher the efficiency of amachine, the better is its energy saving performance. The use of magnet material can increase theefficiency of the electric machine to a great extent. In a permanent magnet generator, field excitationis provided by permanent magnet material. As a result, the carbon brushes, slip rings, field windingand its copper loss, dc supplies are elimi...