Download the full-sized PDF of Wide Speed Range Operation of Concentrated Winding Interior Permanent Magnet Synchronous MachinesDownload the full-sized PDF



Permanent link (DOI):


Export to: EndNote  |  Zotero  |  Mendeley


This file is in the following communities:

Graduate Studies and Research, Faculty of


This file is in the following collections:

Theses and Dissertations

Wide Speed Range Operation of Concentrated Winding Interior Permanent Magnet Synchronous Machines Open Access


Other title
Type of item
Degree grantor
University of Alberta
Author or creator
Toulabi, Mohammad Sedigh
Supervisor and department
Andrew M Knight (Electrical and Computer Engineering, University of Alberta)
John Salmon (Electrical and Computer Engineering, University of Alberta)
Examining committee member and department
Nigel Schofield (Electrical and Computer Engineering, McMaster University)
Venkata Dinavahi (Electrical and Computer Engineering, University of Alberta)
Jeremy Sit (Electrical and Computer Engineering, University of Alberta)
Ashwin Iyer (Electrical and Computer Engineering, University of Alberta)
Department of Electrical and Computer Engineering
Energy Systems
Date accepted
Graduation date
2016-06:Fall 2016
Doctor of Philosophy
Degree level
The design, simulation and experimental evaluation of an Interior Permanent Magnet Synchronous Motor (IPMSM) are investigated. The motor is designed to be capable of operation from either a concentrated single inverter supply or in an “Open-Winding” configuration using two converters. In order to investigate the relationships between geometry, circuit parameters and desirable performance, a parametric design of experiments study based on the changes to the motor geometry is conducted. Two Dimensional Finite Element Method (2D-FEM) is used to simulate the impact of geometric design changes on motor operation. In order to increase the voltage applied to each phase of the machine and extend the operating region, an IPMSM is modeled in an open winding structure fed by two isolated Voltage Source Converters using a dual inverter drive structure. Each converter is controlled to supply only either real power or reactive power. The motor performance is experimentally evaluated in single inverter and dual inverter drives. With a single inverter drive, a wide speed range (6.66 time base speed) is observed, with peak efficiency above 90%, both of which are close to the expectations from simulation analysis. To ensure a reliable performance for the open winding IPMSM using a dual inverter drive, a new control technique is proposed and verified. Two significant contributions are made. The first is to evaluate the motor geometry changes and their impact on the IPMSM’s performance, especially for wide speed range open winding applications. The second is to develop a new control method for the dual inverter open winding IPMSM in order to extend the operating region, improve the power capability and efficiency.
This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for the purpose of private, scholarly or scientific research. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
Citation for previous publication
M. S. Toulabi, J. Salmon, A. Knight, “Design and Performance Assessment for the V-Shaped Magnet IPM Synchronous Motor” IEEE International Electric Machines and Drives Conference (IEMDC), Pp: 214-219, 2015M. S. Toulabi, J. Salmon, A. M. Knight “Analysis of a Wide Speed Range Open Winding IPM with Floating Bridge” IEEE International Symposium on Industrial Electronics (ISIE), Pp: 1440-1445, 2015M. S. Toulabi, J. Salmon, A. M. Knight “Concentrated Winding IPM Synchronous Motor Design for Wide Field Weakening Applications” IEEE Energy Conversion Congress and Exposition (ECCE), Pp: 3865-3871, 2015

File Details

Date Uploaded
Date Modified
Audit Status
Audits have not yet been run on this file.
File format: pdf (PDF/A)
Mime type: application/pdf
File size: 6961930
Last modified: 2016:11:16 13:07:19-07:00
Filename: Toulabi_Mohammad Sedigh_201607_PhD.pdf
Original checksum: 73a7a6f88a9b595f9059883d3f342902
Activity of users you follow
User Activity Date