{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390860929791462144.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1541/ieejjia.23003377"}},{"identifier":{"@type":"NDL_BIB_ID","@value":"033156530"}},{"identifier":{"@type":"URI","@value":"http://id.ndl.go.jp/bib/033156530"}},{"identifier":{"@type":"URI","@value":"https://ndlsearch.ndl.go.jp/books/R000000004-I033156530"}},{"identifier":{"@type":"URI","@value":"https://www.jstage.jst.go.jp/article/ieejjia/12/6/12_23003377/_pdf"}}],"dc:title":[{"@language":"en","@value":"Reducing Cogging Torque with Rotor Surface Notches in Double-Layered IPMSMs"}],"dc:language":"en","description":[{"type":"abstract","notation":[{"@language":"en","@value":"<p>In this study, a design method is proposed for forming notches on the rotor surface to reduce the cogging torque of interior permanent magnet synchronous motors (IPMSMs) with double-layered magnets. The proposed method is predominantly based on theoretical equations and can be applied to general double-layered IPMSMs, regardless of the magnet arrangement. First, the waveform of the square of the air-gap flux density (<i>B</i><i><sub>g</sub></i><sup>2</sup>) for the reference model is approximated using a two-step trapezoidal waveform. Using the approximation, the harmonic components of <i>B</i><i><sub>g</sub></i><sup>2</sup> are formulated when notches are fabricated on the rotor surface. Additionally, we derive a <i>B</i><i><sub>g</sub></i><sup>2</sup> waveform that minimizes the main harmonic components of the cogging torque. The position and width of the notches are determined based on the derived waveform, and only the notch depth is adjusted by finite element analysis. The finite element analysis reveals that the cogging torque for the model with the optimized notch placement is significantly reduced. Furthermore, prototypes were manufactured and their cogging torque waveforms were measured. The measurements confirm that the amplitude and major components of the cogging torque are reduced.</p>"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410860929791462145","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Morimoto Shigeo"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Osaka Metropolitan University"}]},{"@id":"https://cir.nii.ac.jp/crid/1410860929791462144","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Inoue Yukinori"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Osaka Metropolitan University"}]},{"@id":"https://cir.nii.ac.jp/crid/1410860929791462146","@type":"Researcher","foaf:name":[{"@language":"en","@value":"Sanada Masayuki"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Osaka Metropolitan University"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"21871094"},{"@type":"LISSN","@value":"21871094"},{"@type":"EISSN","@value":"21871108"},{"@type":"NDL_BIB_ID","@value":"023598422"},{"@type":"ISSN","@value":"21871094"}],"prism:publicationName":[{"@language":"en","@value":"IEEJ Journal of Industry Applications"},{"@value":"IEEJ Journal of Industry Applications"},{"@language":"en","@value":"IEEJ Journal IA"},{"@value":"IEEJ Journal IA"}],"dc:publisher":[{"@language":"en","@value":"The Institute of Electrical Engineers of Japan"},{"@language":"ja","@value":"一般社団法人 電気学会"}],"prism:publicationDate":"2023-11-01","prism:volume":"12","prism:number":"6","prism:startingPage":"1096","prism:endingPage":"1103"},"reviewed":"false","url":[{"@id":"http://id.ndl.go.jp/bib/033156530"},{"@id":"https://ndlsearch.ndl.go.jp/books/R000000004-I033156530"},{"@id":"https://www.jstage.jst.go.jp/article/ieejjia/12/6/12_23003377/_pdf"}],"availableAt":"2023-11-01","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=cogging%20torque","dc:title":"cogging torque"},{"@id":"https://cir.nii.ac.jp/all?q=gap%20flux%20density","dc:title":"gap flux density"},{"@id":"https://cir.nii.ac.jp/all?q=interior%20permanent%20magnet%20synchronous%20motor","dc:title":"interior permanent magnet synchronous motor"},{"@id":"https://cir.nii.ac.jp/all?q=notch%20design","dc:title":"notch design"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360011146424950016","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A Dual Notched Design of Radial-Flux Permanent Magnet Motors with Low Cogging Torque and Rare Earth Material"}]},{"@id":"https://cir.nii.ac.jp/crid/1360016978918595712","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A Study on the Reduction of Cogging Torque for the Skew of a Magnetic Geared Synchronous Motor"}]},{"@id":"https://cir.nii.ac.jp/crid/1360025430631141248","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Survey and Analysis for High Power Factor <scp>IPMSM</scp> Drive System Using Electrolytic Capacitor‐Less Inverter"}]},{"@id":"https://cir.nii.ac.jp/crid/1360298340902909440","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Vibration Reduction of IPM-Type BLDC Motor Using Negative Third Harmonic Elimination Method of Air-Gap Flux Density"}]},{"@id":"https://cir.nii.ac.jp/crid/1360298450731227008","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Comparison of Cogging Torque Reduction in Permanent Magnet Brushless Machines by Conventional and Herringbone Skewing Techniques"}]},{"@id":"https://cir.nii.ac.jp/crid/1360298452765621632","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A Novel Design for Notch on Rotor Surface of Double-Layered Interior Permanent Magnet Synchronous Motor for Reducing Cogging Torque"}]},{"@id":"https://cir.nii.ac.jp/crid/1360298453899459200","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Electrical Propulsion System Design of Chevrolet Bolt Battery Electric Vehicle"}]},{"@id":"https://cir.nii.ac.jp/crid/1360298455069837184","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Electromagnetic Performance Analysis and Verification of a New Flux-Intensifying Permanent Magnet Brushless Motor With Two-Layer Segmented Permanent Magnets"}]},{"@id":"https://cir.nii.ac.jp/crid/1360579925544599296","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Reducing Cogging Torque in Flux Switching Motors With Segmented Rotor"}]},{"@id":"https://cir.nii.ac.jp/crid/1360861400636887424","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Combined numerical and analytical method for geometry optimization of a PM motor"}]},{"@id":"https://cir.nii.ac.jp/crid/1360861403109644416","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Various design techniques to reduce cogging torque by controlling energy variation in permanent magnet motors"}]},{"@id":"https://cir.nii.ac.jp/crid/1360861404452108032","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Design of Notches on Rotor Surface to Minimize Cogging Torque in Dual-Layered IPMSM by Optimizing Squared Gap Flux Density Waveform"}]},{"@id":"https://cir.nii.ac.jp/crid/1362544421128338176","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A Novel Cogging Torque Reduction Method for Interior-Type Permanent-Magnet Motor"}]},{"@id":"https://cir.nii.ac.jp/crid/1362825893416394240","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Trend of permanent magnet synchronous machines"}]},{"@id":"https://cir.nii.ac.jp/crid/1363670319663996544","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Design techniques for reducing the cogging torque in surface-mounted PM motors"}]},{"@id":"https://cir.nii.ac.jp/crid/1364230498299085056","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Cogging torque investigation of PM motors resulting from asymmetry property of magnetic poles: Influence of performance variation between permanent magnets"}]},{"@id":"https://cir.nii.ac.jp/crid/1364233270513287808","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Recent technical trends in PMSM"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001205416769024","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Selective Elimination of EMF Harmonics with Stepped Skewing for Ripple Torque Reduction in Surface-Mounted Permanent Magnet Motors"}]},{"@id":"https://cir.nii.ac.jp/crid/1390290617368174848","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"The Evolution of Electric Components in Prius"}]},{"@id":"https://cir.nii.ac.jp/crid/1390306200182716416","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Magnet Reduction of V-shaped Interior Permanent Magnet Motor by Split Rotor and Non-Magnetic Wedge"}]},{"@id":"https://cir.nii.ac.jp/crid/1390573407666379392","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Magnetic Form applying a C-Shaped Magnet for Hybrid Electric Vehicles"}]},{"@id":"https://cir.nii.ac.jp/crid/1390848250114708096","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Design Method of a Rotor Structure with Notch for Reducing the Cogging Torque of a Double-Layered IPMSM"},{"@language":"ja","@value":"2層IPMSMのコギングトルクを低減するための溝を設けたロータ形状の設計手法"},{"@language":"ja-Kana","@value":"2ソウ IPMSM ノ コギングトルク オ テイゲン スル タメ ノ ミゾ オ モウケタ ロータ ケイジョウ ノ セッケイ シュホウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390869150136141056","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Vibration Suppression Method using Disturbance Observer in Sensorless 120-degree Conduction Compressor Motor 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