INTERNALLY EMBEDDED MAGNET TYPE MOTOR HAVING SMALL COGGING TORQUE

PROBLEM TO BE SOLVED: To inexpensively provide an internally embedded magnet type brushless motor having a small cogging torque. SOLUTION: An internally embedded magnet type motor is configured as follows. A motor includes a stator having an annular yoke and a plurality of teeth on the inner periphe...

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Bibliographische Detailangaben
Hauptverfasser:	FUJITA AKIRA, ODA YOSHIHIKO, KONO MASAAKI, ZAIZEN YOSHIAKI, SHIGA NOBUISA
Format:	Patent
Sprache:	eng
Schlagworte:	CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DYNAMO-ELECTRIC MACHINES ELECTRICITY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GENERATION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To inexpensively provide an internally embedded magnet type brushless motor having a small cogging torque. SOLUTION: An internally embedded magnet type motor is configured as follows. A motor includes a stator having an annular yoke and a plurality of teeth on the inner peripheral side of the yoke, and a cylindrical rotor held rotatably on the inner periphery of the stator and embedded with permanent magnets. The magnetic permeability (μS) of a stator material is 5,000-20,000, while the magnetic permeability (μR) of a rotor material is 500-10,000, and the ratio (μS/μR) between the magnetic permeabilities of the stator material and the rotor material exceeds 1.0. COPYRIGHT: (C)2010,JPO&INPIT