Analysis of Squirrel Cage Induction Machine Based on the Magductance Modulator

In order to conduct an explicit analysis of the induction machine (IM), the sole magnetic field parameter’s description of short-circuited coils (SCC) modulator is crucial, despite its absence in the literature. This article presents a novel concept of introducing magductance into the SCC, thus referring to the SCC modulator as the magductance modulator. The modulation operator is completely studied from magnetic field parameters, thereby adding in understanding the working principle of IM. Expressions for the modulated magnetomotive force (MMF) is elucidated specifically for the squirrel cage induction machine (SCIM). Unique vector modulation to the magductance modulator is unveiled. Then, the effects of modulator parameters on machine performance are investigated. The calculation process based on the proposed method is illustrated in detail, with the key performance parameter expressed. The proposed method is validated through comparisons with finite element analysis (FEA) and experimental results.