Line-start axial-flux permanent-magnet synchronous motor

Amin Mahmoudi, Solmaz Kahourzade, Mohammad Nasir Uddin, Nasrudin Abd Rahim, Wooi Ping Hew

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)


This paper presents the design process of a novel axial-flux permanent-magnet (AFPM) motor capable of auto-starting. The preliminary design is a slot-less double-sided solid-rotor line-start AFPM motor with 4 poles for high torque density and stable rotation. One spaced raised ring was added to the inner radii of the rotor disc for smooth line-start motor. The design allows the motor to operate at both starting and synchronous speeds. The basic equations for the solid ring of the rotor for the proposed axial-flux permanent-magnet motor are presented. Non-symmetry of the designed motor led to its 3D time-stepping finite element analysis (FEA), which is used to evaluate the design parameters and predict the transient performance. The designed motor was fabricated and tested; sample experimental result showed good agreement with those of FEA based simulated results. The prototype motor showed excellent characteristics (high starting torque, good synchronization), and excellent steady-state performance.

Original languageEnglish
Title of host publication2013 IEEE Energy Conversion Congress and Exposition
Number of pages7
ISBN (Electronic)978-1-4799-0336-8
Publication statusPublished - 31 Dec 2013
Externally publishedYes
Event5th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2013 - Denver, CO, United States
Duration: 15 Sept 201319 Sept 2013

Publication series

Name2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013


Conference5th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2013
Country/TerritoryUnited States
CityDenver, CO


  • axial-flux permanent-magnet motor
  • finite element analysis
  • line-start
  • solid-rotor


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