NDLI: Improved rotor structures for increasing flux per pole of permanent magnet synchronous motor

Content Provider	IET Digital Library
Author	Kim, Hae Joong Moon, Jae Won
Abstract	This study proposes an improved rotor structure that can increase the flux per pole of a permanent magnet synchronous motor. The air-gap flux density of the improved rotor-type motor is calculated using an equivalent magnetic circuit and compared with the calculation result that is obtained using finite element analysis (FEA). In addition, the no-load fundamental air-gap flux density of the surface-mounted permanent magnet motor, interior permanent magnet motor, spoke-type motor, and improved rotor-type motor are compared using FEA. Changes in the no-load fundamental air-gap flux density according to changes in the rotor diameter and permanent magnet usage are examined for each rotor type. A comparison of the fundamental air-gap flux densities of the five rotor types, including the improved rotor-type conducted using FEA demonstrated that the air-gap flux density of the improved rotor-type was highest. A comparison of the no-load phase back EMF of the five types was conducted after designing them in the four-pole six-slot structure. Each rotor type is applied to 80 W-grade fan motors, and the torque ripple and iron loss are compared. A prototype of the improved rotor-type motor is developed, and the no-load phase back EMF and load test result are verified through experiments.
Starting Page	415
Ending Page	422
Page Count	8
ISSN	17518660
Volume Number	12
e-ISSN	17518679
Issue Number	Issue 3, Mar (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-epa/12/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2017.0432
Journal	IET Electric Power Applications
Publisher Date	2017-11-27
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	2D-FEA EMC Equivalent Magnetic Circuit Finite Element Analysis Four-pole Six-slot Structure Fundamental Air-gap Flux Densities Grade Fan Motors Improved Rotor Structure Improved Rotor-type Motor Interior PM Motor Iron Loss No-load Fundamental Air-gap Flux Density No-load Phase Back EMF Permanent Magnet Motors Permanent Magnet Synchronous Motor PM Synchronous Motor Power 80 W Rotor Diameter Rotors Spoke-type Motor Surface-mounted PM Motor Synchronous Machine Synchronous Motors Torque Ripple
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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