本論文主要的目的是描述機電系統的三種數學表示式，並利用三種方法來分析以這些表示式來描述之機電系統平衡態的穩定性。之後再提供一些例子說明這些表示式和方法實際運用的情況。

Inthisthesis,threeformulationsoftheelectromechanicalsystemsareintroduced.Meth-odsofstabilityanalysissuchasLaSalle'sprinciple,linearizationandenergy-Casimirmethodareemployedinstudyingsomeexamplesofelectriccircuitsandmotors.

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