電機子反作用磁界の第2高調波を利用した交流発電機の自己励磁法

概要

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For ac-generators, a new self-excitation scheme has been proposed. The generator employing this scheme behaves as a flat-compound machine without any automatic voltage regulators. The stator of the generator is provided with an armature winding which generates the fundamental and 2nd-harmonic mmfs. The rotor is equipped with a field winding and a harmonic winding. Letting the current flow in the stator armature winding, the ac voltage is induced in the rotor harmonic winding due to the 2nd-harmonic component of armature mmfs. By connecting the harmonic winding to the field winding through a rectifier circuit, self-excitation of the generator is obtained. This excitation scheme is both self-excited and brushless, and no exciter is required. Additionally, the voltage regulation due to the load variation can be improved by selecting a capacitance of a condenser connected to the terminals of the armature winding.<BR>In this paper the operating principle and circuit configuration of the generator are explained, and the experimental results using a 1kVA prototype machine are shown. Then, the generator caracteristics are theoretically clarified by approximate analysis, and appropriateness of the theory and the usefulness of the proposed scheme are experimentally confirmed.
公益社団法人日本マリンエンジニアリング学会の論文