A measuring system for magnetostriction of silicon steel sheet using optical methods and a single sheet tester has been developed to establish a standard test method for IEC and JIS. Various factors affecting measurement accuracy and reproducibility of the developed system are examined. Two optical instruments, such as a laser Doppler vibrometer and a heterodyne displacement meter, are compared. 3-D characteristics of magnetostriction under ac excitation in the rolling direction are measured up to 2.0 T
en-copyright= kn-copyright= en-aut-name=NakaseTomoya en-aut-sei=Nakase en-aut-mei=Tomoya kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=NakanoMasanori en-aut-sei=Nakano en-aut-mei=Masanori kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 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=3 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=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=Doppler measurement kn-keyword=Doppler measurement en-keyword=ferromagnetic materials kn-keyword=ferromagnetic materials en-keyword=iron alloys kn-keyword=iron alloys en-keyword=magnetic variables measurement kn-keyword=magnetic variables measurement en-keyword=magnetostriction kn-keyword=magnetostriction en-keyword=measurement by laser beam kn-keyword=measurement by laser beam en-keyword=silicon alloys kn-keyword=silicon alloys END start-ver=1.4 cd-journal=joma no-vol=34 cd-vols= no-issue=4 article-no= start-page=806 end-page=812 dt-received= dt-revised= dt-accepted= dt-pub-year=1998 dt-pub=19988 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Implementation and position control performance of a position-sensorless IPM motor drive system based on magnetic saliency en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper describes position-sensorless control of an interior permanent magnet synchronous (IPM) motor, which is characterized by real-time position estimation based on magnetic saliency. The real-time estimation algorithm detects motor current harmonics and determines the inductance matrix, including rotor position information. An experimental system consisting of an IPM motor and a voltage-source pulsewidth modulation inverter has been implemented and tested to confirm the effectiveness and versatility of the approach. Some experimental results show that the experimental system has the function of electrically locking the loaded motor, along with a position response of 20 rad/s and a settling time of 300 ms
en-copyright= kn-copyright= en-aut-name=OgasawaraSatoshi en-aut-sei=Ogasawara en-aut-mei=Satoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University en-keyword=DC-AC power convertors kn-keyword=DC-AC power convertors en-keyword=PWM invertors kn-keyword=PWM invertors en-keyword=control system synthesis kn-keyword=control system synthesis en-keyword=machine control kn-keyword=machine control en-keyword=machine testing kn-keyword=machine testing en-keyword=machine theory kn-keyword=machine theory en-keyword=parameter estimation kn-keyword=parameter estimation en-keyword=permanent magnet motors kn-keyword=permanent magnet motors en-keyword=position control kn-keyword=position control en-keyword=synchronous motor drives kn-keyword=synchronous motor drives END