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Title: Computing the External Magnetic Scalar Potential due to an Unbalanced Six-Pole Permanent Magnet Motor

The accurate computation of the external magnetic field from a permanent magnet motor is accomplished by first computing its magnetic scalar potential. In order to find a solution which is valid for any arbitrary point external to the motor, a number of proven methods have been employed. Firstly, A finite element model is developed which helps generate magnetic scalar potential values valid for points close to and outside the motor. Secondly, charge simulation is employed which generates an equivalent magnetic charge matrix. Finally, an equivalent multipole expansion is developed through the application of a toroidal harmonic expansion. This expansion yields the harmonic components of the external magnetic scalar potential which can be used to compute the magnetic field at any point outside the motor.
Authors:
Publication Date:
OSTI Identifier:
903191
Report Number(s):
LM-07K005
TRN: US200720%%205
DOE Contract Number:
DE-AC12-00SN39357
Resource Type:
Technical Report
Research Org:
Knolls Atomic Power Laboratory (KAPL), Niskayuna, NY
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; HARMONICS; MAGNETIC FIELDS; MOTORS; MULTIPOLES; PERMANENT MAGNETS; SCALARS; SIMULATION