Free piston linear generator in comparison to other range-extender technologies

Analysis of Tubular-type Linear Generator for Free-Piston Engine

Tubular-type linear generator for the free-piston engine is anlayzed using finite element method and its characteristics are explaind. Magnetic characteristics of the linear generator are calculated using the finite element method and various structures are considered to achieve the lowest detent force within the rated voltage. The path of the magnetic flux is constructed by the axially magneti...

Linear Alternator Technologies Used for Free Piston Stirling

Introduction: The NASA Glenn Research Center (GRC) is conducting in-house research on linear alternators (LA’s) to assist in developing free-piston Stirling convertors for radioisotope space power systems. This abstract intends to summarize the existing and potential types of LA’s that may be used with Stirling power convertors. Many of the existing LA types have been tested at NASA GRC and wor...

A novel concept of a Transverse Flux Linear Free-Piston Generator

This paper investigates the electrical machine, which is one of the important parts in the Free Piston Energy Converter (FPEC). In the previous work it was found that one of the best candidate suitable for the FPEC is a Transverse Flux Machine (TFM) due to the very tough requirements on the electrical machine such as a low weight of the translator (movable part in the machine).This paper presen...

Stable Operation and Electricity Generating Characteristics of a Single-Cylinder Free Piston Engine Linear Generator: Simulation and Experiments

We present a novel design of a single-cylinder free piston engine linear generator (FPELG) incorporating a linear motor as a rebound device. A systematic simulation model of this FPELG system was built containing a kinematic and dynamic model of the piston and mover, a magneto-electric model of the linear generator, a thermodynamic model of the single-cylinder engine, and a friction model betwe...

Dimensionless Parametric Analysis of Spark Ignited Free-Piston Linear Alternator