scholarly journals Design and analysis of a novel yokeless mover permanent magnet linear generator for free piston engine converter

2021 ◽  
Author(s):  
Arman Tajdiny ◽  
Hassan Monsef ◽  
Hamid Lessani
Keyword(s):  
Permanent Magnet ◽  
Piston Engine ◽  
Free Piston ◽  
Linear Generator ◽  
Free Piston Engine

Modeling and Design of a Tubular Linear Generator for Direct-Drive Free-Piston Engine

2021 ◽  
Author(s):  
Christophe S. Cyusa ◽  
Tamanwe Payarou ◽  
Dwaipayan Barman ◽  
Tamas Bertenyi ◽  
Philip Raphals ◽  
...  
Keyword(s):  
Direct Drive ◽  
Piston Engine ◽  
Free Piston ◽  
Linear Generator ◽  
Free Piston Engine

scholarly journals Design considerations of a linear generator for a range extender application

2015 ◽  
Vol 64 (4) ◽  
pp. 581-592
Author(s):  
Un-Jae Seo ◽  
Björn Riemer ◽  
Rüdiger Appunn ◽  
Kay Hameyer
Keyword(s):  
Electric Vehicle ◽  
High Efficiency ◽  
Piston Engine ◽  
Free Piston ◽  
Full Load ◽  
Linear Generator ◽  
Design Considerations ◽  
Range Extender ◽  
Free Piston Engine ◽  
Linear Generators

Abstract The free piston linear generator is a new range extender concept for the application in a full electric vehicle. The free piston engine driven linear generators can achieve high efficiency at part and full load which is suitable for the range extender application. This paper presents requirements for designing a linear generator deduced from a basic analysis of a free piston linear generator.

Development of free piston engine linear generator system and a resonant pendulum type control method

2020 ◽  
pp. 146808742093124
Author(s):  
Hidemasa Kosaka ◽  
Tomoyuki Akita ◽  
Shigeaki Goto ◽  
Yoshihiro Hotta
Keyword(s):  
Control Method ◽  
Experimental Result ◽  
Piston Engine ◽  
Piston Motion ◽  
Generator System ◽  
Free Piston ◽  
Linear Generator ◽  
Reference Profile ◽  
Cycle Simulation ◽  
Free Piston Engine

A free piston engine linear generator, which has the potential of the compact physique, high brake efficiency and high flexibility for fuel, has been developed. The developed free piston engine linear generator consists of a two-stroke combustion unit, an air-bounce chamber and a linear generator. The key technologies to realize the continuous operation are the control method and lubricating and cooling strategies. The proposed structure is featured as a piston shape with two different diameters coaxially, called a “W-shape” piston, which has an empty space inside for the oil cooling path. The performance of the structure is evaluated by a one-dimensional cycle simulation. The result indicates the possible output power of 10 kW and thermal efficiency of 42% using premixed charge compression ignition combustion strategy. The control method is another challenge of the free piston engine linear generator. This work proposes two strategies of the position feedback control method and the resonant pendulum type control method. The first method has the function of the feedback loops for the piston position and velocity so that the piston motion follows the reference profile calculated in advance. The experimental results show the limited range of operation because the fixed profile does not absorb the deviation of the piston motion due to the combustion deviation. The second method is based on the speed control without a fixed reference profile of the piston motion. The experimental result shows the robustness to the change in operating parameters such as ignition position, amount of fuel and desired power output.

scholarly journals Tribological Characteristics of Piston Ring in a Free-piston Engine for Linear Generator

2014 ◽  
Vol 61 ◽  
pp. 979-983 ◽  
Author(s):  
Chenheng Yuan ◽  
Huihua Feng ◽  
Zhengxing Zuo ◽  
Yanxiao Li
Keyword(s):  
Piston Ring ◽  
Tribological Characteristics ◽  
Piston Engine ◽  
Free Piston ◽  
Linear Generator ◽  
Free Piston Engine

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

Energies ◽  
2015 ◽  
Vol 8 (2) ◽  
pp. 765-785 ◽  
Author(s):  
Huihua Feng ◽  
Yu Song ◽  
Zhengxing Zuo ◽  
Jiao Shang ◽  
Yaodong Wang ◽  
...  
Keyword(s):  
Stable Operation ◽  
Piston Engine ◽  
Free Piston ◽  
Single Cylinder ◽  
Linear Generator ◽  
Free Piston Engine
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