A Study for Rotor Current of Induction Motor

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K04427
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 21010:Power engineering-related
• Research Institution: Chubu University
• Principal Investigator: Hirotsuka Isao 中部大学, 工学部, 教授 (20228844)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 誘導電動機 / 回転子電流 / 高調波 / 高調波磁束 / 滑り周波数 / 特性改

Outline of Final Research Achievements

Squirrel-cage induction motors (IMs) are widely used as industrial power supply, and there is a demand for even higher performance. However, since the rotor current of IM remains unclear, the study of the harmonic flux in the air-gap has not been sufficiently carried out at present.
Therefore, I made a prototype IM (FOR-IM), which is outer rotor configuration with rotating stator and fixed cage-rotor. The rotor current can be directly measured using FOR-IM. During the research period, the second prototype FOR-IM was made, and its basic characteristics and the feature of rotor bar current were clarified theoretically and experimentally.

Free Research Field

電気機器

Academic Significance and Societal Importance of the Research Achievements

試作したFOR-IMの基本的な特性は，汎用IMと同様に検討できることから，FOR-IMを用いて測定・検討した回転子電流の特徴などは，IM全般に適用できるものと考えている。特に，IMの回転子電流を直接かつ詳細に実測した例は国内外に見当たらず，当該研究成果は，IMの更なる研究の基礎として寄与できるものと考えている。また，回転子電流を具体的に知ることにより，回転子電流に含まれる高調波成分の発生原因を明確にすることができ，今後のIMの設計などにも応用できるものと考えている。