Linear Synchronous Generator Research Articles

Modelling and test results of the Archimedes wave swing

The objective of this paper is to describe the modelling and some of the offshore test results of the full-scale model of Archimedes wave swing (AWS) at Portugal in 2004. The AWS is a system that converts ocean wave energy into electric energy. A pilot plant of this system has been built. The paper starts with the derivation of a model for the floater motion. Next, the generator system is described and modelled. The generator system consists of a permanent-magnet linear synchronous generator with a current source inverter. Subsequently, test results are presented to validate the models for the floater motion and the generator. Finally, some conclusions are drawn.

Basic characteristics of the linear synchronous generator using mechanical vibration

The liner synchronous generator system is developed. In most of vehicles, vibration occurs. Mechanical vibration of the vehicle is absorbed by mechanical dampers and other facilities, so this energy is consumed wastefully. Using the linear generator, energy of vibration is converted to electrical energy. Also, this generator works as an active damper. The experimental device has been developed. The method of the experiment is shown. The vibration data is measured by the handy measurement system and vibration is reproduced at the vibration generator connected to the linear generator. The basic characteristics of the liner generator system are shown. The vibration data of the car is measured. Using this data, characteristics of the generator is observed. The experimental results show the linear works adequately.

Design, modelling and test results of the AWS PM linear generator

AbstractThe Archimedes Wave Swing (AWS) is a system that converts ocean wave energy into electrical energy. A pilot plant of this system has been built. This paper describes the design of the permanent‐magnet (PM) linear synchronous generator applied in the AWS. Based on a magnetic circuit model, it is concluded that saturation does not play an important role. The correlation between measured and calculated generator parameters and no‐load voltage is reasonable, which indicates that the generator is adequate. Copyright © 2005 John Wiley & Sons, Ltd.

波力発電用リニア同期発電機の磁極ピッチと損失の関係

波力発電用リニア同期発電機の磁極ピッチと損失の関係

Linear PM Generator System for Wave Energy Conversion in the AWS

The Archimedes Wave Swing is a system that converts ocean wave energy into electric energy. A pilot plant of this system has been built. The generator system consists of a permanent-magnet linear synchronous generator with a current source inverter (CSI). The correlation between the measured and the calculated parameters of the designed generator is reasonable. The annual energy yield of the pilot plant is calculated from the wave distribution as 1.64 GWh. Using a voltage source inverter instead of a CSI improves the power factor, the current waveforms, the efficiency and the generator force, so that the annual energy yield increases with 18%.

On-orbit experiment plan on solar thermodynamic power system

This paper presents the on-orbit experiment plan of the solar thermodynamic power system operating the space flyer unit (SFU) presently being developed in Japan. The on-orbit experiments will be conducted with four primary objectives. First, to demonstrate the operation of the solar thermodynamic system in space environment. Second, to assess the performance capability of the solar thermodynamic system in space. Third, to verify functions of thermodynamic engine, solar ray collector, thermal storage system and space radiator especially from view point of durability and reliability. Fourth, to examine how vibration and inertia caused by moving parts of thermodynamic engine affect the primary functions of SFU and other mission payloads. The solar thermodynamic power system consists of a free piston-type Stirling engine, a linear synchronous generator, a Cassegrain-type solar ray collector, a thermal storage system and a space radiator. This system produces the continuous electric power of 2.5 kW, 330 V a.c. using 4.3 m dia solar collector. The output power is fed to the MPD thruster experiment. This experiment is proposed for the second SFU mission called “Energy Mission” in the mid 1990s. As a preliminary experiment, the ballistic flight experiment using sounding rocket is also planned.