本研究目的是將線性交流發電機結合自由活塞式史特靈引擎進行數值分析，了解線性交流發電機之發電效率及自由活塞式史特靈引擎之動態特性。由於自由活塞式史特靈引擎啟動運作參數範圍極小，當與線性交流發電機作耦合後，必須了解兩者結合後之運作特性。控制引擎運轉的參數相當多且複雜，因此將自行開發與設計線性交流發電機之原型機，透過電磁模擬軟體JMAG進行參數分析，提供未來進行線性交流發電機的設計方向，掌握其關鍵之技術。此外將熱力模型、電磁模型及動力模型結合後進行數值分析，探討動子永久磁鐵尺寸、不同負載電阻、不同磁路設計等參數影響，來了解自由活塞式史特靈引擎與線性交流發電機耦合後之運作頻率、衝程與發電效率。

The aim of this study is to perform a numerical analysis of a linear alternator with a free-piston Stirling engine for the electrical efficiency of a linear alternator and the dynamic characteristics when it is integrated with a free-piston Stirling engine. Since the free-piston Stirling engine can only operate with a very small range of design and operating parameters, it is necessary to understand the dynamic behaviors of the integrated system. In parallel, a prototype linear alternator is developed and designed, with the help of the electromagnetic simulation software JMAG, which could provide the design concepts. The numerical analyses are composed of the thermodynamic model, dynamic model and electromagnetic model In addition, the influences of permanent magnet size, load resistance and the magnetic circuit design are predicted the operating frequency, stroke and electrical efficiency when the linear alternator is combined with the free-piston Stirling engine.

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