Factors affecting the convergence characteristics and results obtained by the optimal design method using the finite element method and simulated annealing are investigated systematically, and the optimal parameters for simulated annealing method are obtained. The optimal shape of the die mold for orientation of the magnetic powder (nonlinear magnetostatic problem) is obtained using finite elements and simulated annealing. The experimental verification is also carried out
en-copyright= kn-copyright= en-aut-name=TakahashiNorio en-aut-sei=Takahashi en-aut-mei=Norio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=EbiharaKenji en-aut-sei=Ebihara en-aut-mei=Kenji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=YoshidaKoji en-aut-sei=Yoshida en-aut-mei=Koji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=NakataTakayoshi en-aut-sei=Nakata en-aut-mei=Takayoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=OhashiKen en-aut-sei=Ohashi en-aut-mei=Ken kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=MiyataKoji en-aut-sei=Miyata en-aut-mei=Koji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University affil-num=5 en-affil= kn-affil=Shin-Etsu Chemical Corporation Limited affil-num=6 en-affil= kn-affil=Shin-Etsu Chemical Corporation Limited en-keyword=convergence of numerical methods kn-keyword=convergence of numerical methods en-keyword=electrical engineering kn-keyword=electrical engineering en-keyword=electrical engineering computing kn-keyword=electrical engineering computing en-keyword=electromagnets kn-keyword=electromagnets en-keyword=finite element analysis kn-keyword=finite element analysis en-keyword=magnetic particles kn-keyword=magnetic particles en-keyword=magnetostatics kn-keyword=magnetostatics en-keyword=simulated annealing kn-keyword=simulated annealing END start-ver=1.4 cd-journal=joma no-vol=32 cd-vols= no-issue=3 article-no= start-page=804 end-page=807 dt-received= dt-revised= dt-accepted= dt-pub-year=1996 dt-pub=19965 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Improvement of convergence characteristic of ICCG method for the A-φ method using edge elements en-subtitle= kn-subtitle= en-abstract= kn-abstract=The effect of the scalar potential φ in the A-φ method on the convergence characteristic of the incomplete Cholesky conjugate gradient (ICCG) method using the edge element is investigated. Several 3-D eddy current models are analyzed both by taking into account φ and neglecting φ to compare the convergence characteristics. It is illustrated that the CPU time using φ is less than ½ of that neglecting φ, and there are some models in which the use of φ enables us to obtain convergent solutions
en-copyright= kn-copyright= en-aut-name=FujiwaraKoji en-aut-sei=Fujiwara en-aut-mei=Koji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=NakataTakayoshi en-aut-sei=Nakata en-aut-mei=Takayoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=OhashiHiromitsu en-aut-sei=Ohashi en-aut-mei=Hiromitsu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=computational complexity kn-keyword=computational complexity en-keyword=conjugate gradient methods kn-keyword=conjugate gradient methods en-keyword=convergence of numerical methods kn-keyword=convergence of numerical methods en-keyword=eddy currents kn-keyword=eddy currents en-keyword=electrical engineering kn-keyword=electrical engineering en-keyword=electrical engineering computing kn-keyword=electrical engineering computing en-keyword=finite element analysis kn-keyword=finite element analysis END start-ver=1.4 cd-journal=joma no-vol=32 cd-vols= no-issue=3 article-no= start-page=749 end-page=752 dt-received= dt-revised= dt-accepted= dt-pub-year=1996 dt-pub=19965 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Linear AC steady-state eddy current analysis of high speed conductor using moving coordinate system en-subtitle= kn-subtitle= en-abstract= kn-abstract=A method for linear analysis of AC steady state eddy currents in a moving conductor using a moving coordinate system is investigated. It is shown that the moving coordinate system is superior to a fixed coordinate system for the analysis of a high speed conductors from the standpoint of stability of the solution. The applicable extent of the moving coordinate system is also discussed for the modelling of electric machine characteristics
en-copyright= kn-copyright= en-aut-name=MuramatsuKazuhiro en-aut-sei=Muramatsu en-aut-mei=Kazuhiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=NakataTakayoshi en-aut-sei=Nakata en-aut-mei=Takayoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=TakahashiNorio en-aut-sei=Takahashi en-aut-mei=Norio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=FujiwaraKoji en-aut-sei=Fujiwara en-aut-mei=Koji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University en-keyword=AC machines kn-keyword=AC machines en-keyword=eddy currents kn-keyword=eddy currents en-keyword=machine theory kn-keyword=machine theory en-keyword=machine windings kn-keyword=machine windings en-keyword=numerical stability kn-keyword=numerical stability END