Performance analysis of the 2DoF direct drive induction motor applying composite multilayer method. Issue 4 (1st April 2017)

• Record Type: Journal Article
• Authors: Si, Jikai; Xie, Lujia; Cao, Wenping; Hu, Yihua; Feng, Haichao
• Is Part Of: IET electric power applications. Volume 11:Issue 4(2017)
• Page Start: 524
• Page End: 531
• Publication Date: 2017-04-01
• Subjects: induction motor drives -- rotors -- stators -- magnetic fields -- equivalent circuits -- power factor -- Maxwell equations -- copper; performance analysis -- 2DoF direct drive induction motor -- composite multilayer method -- performance evaluation -- two‐degree‐of‐freedom direct drive induction motor -- solid rotor -- copper layer -- 2DoFDDIM CMM computer program -- propagation constants -- complex magnetic field -- equivalent circuit -- 2D magnetic field distribution -- Maxwell equations -- power factors -- stator currents -- CMM computation time -- CMM effectiveness; Electric power -- Periodicals; Electric power systems -- Periodicals; 621.305
• DOI: 10.1049/iet-epa.2016.0469
• Languages: English
• ISSNs: 1751-8660

Abstract

Abstract : This study presents a composite multilayer method (CMM) to evaluate the performance of a two‐degree‐of‐freedom (2DoF) direct drive induction motor (2DoFDDIM) whose solid rotor is coated with a copper layer. It includes a rotary part and a linear part. Based on the traditional multilayer theory, a complete 2DoFDDIM CMM computer program importing propagation constants is built. Due to the complex magnetic field in a 2DoFDDIM, this study mainly analyses it from the perspective of a single DOF motor. An equivalent circuit for the rotary part of the 2DoFDDIM is then derived applying CMM and the 2D magnetic field distribution is obtained by solving Maxwell's equations in motor layers. The developed torques, power factors and stator currents of the rotary part with different slips and the latter two of the linear part at zero speed are calculated by CMM, which are then compared with results from the finite element method (FEM) and experimental results. The computation time of the CMM is far less than that of the FEM. The acceptable accuracy confirms the effectiveness of the CMM for analysis and performance calculations of the 2DoFDDIM.