초록 ▼

A magnetic gap is provided between a permanent magnet of a rotor and an auxiliary magnetic pole portion which is arranged adjacent to the permanent magnet in a peripheral direction. A gradual change in a magnetic flux density distribution of a surface of the rotor is obtained and a cogging torque an

A magnetic gap is provided between a permanent magnet of a rotor and an auxiliary magnetic pole portion which is arranged adjacent to the permanent magnet in a peripheral direction. A gradual change in a magnetic flux density distribution of a surface of the rotor is obtained and a cogging torque and a torque pulsation are restrained. By obtaining a reluctance torque according to the auxiliary magnetic pole, a permanent magnet electric rotating machine in which the cogging torque and the torque pulsation are restrained can be obtained and further an electromotive vehicle having the permanent magnet electric rotating machine can be provided.

대표청구항 ▼

[What is claimed is:] [1.]a stator having a stator winding on a stator iron core;a rotor arranged opposite said stator with a rotation air gap in between;plural permanent magnet insertion holes formed in said rotor;magnetic pole piece portions formed in said rotor at a stator side of said rotor;auxi

[What is claimed is:] [1.]a stator having a stator winding on a stator iron core;a rotor arranged opposite said stator with a rotation air gap in between;plural permanent magnet insertion holes formed in said rotor;magnetic pole piece portions formed in said rotor at a stator side of said rotor;auxiliary magnetic pole portions formed in said rotor;plural permanent magnets embedded in said plural permanent magnet insertion holes, such that adjacent ones of said plural permanent magnets are oppositely magnetized, wherein each of said plural permanent magnets extends substantially the entire axial length of said rotor;said auxiliary magnetic pole portions being provided between two adjacent plural permanent magnets in a peripheral direction and a magnetic flux generated from said stator winding passing through said permanent magnet and a reluctant torque being generated;wherein a magnetic gap is provided between at least one of said plural permanent magnets and at least one of said auxiliary magnetic pole portions, thereby a change in magnetic flux density of said permanent magnet and said auxiliary magnetic pole portion is formed smoothly and a cogging torque is reduced.