Abstract: At least one groove 10, two grooves 12 extending toward an axial direction of a rotor 6 is provided on an outer periphery of a rotor iron core 7 or at least one hole 11 is provided in the rotor iron core 7. By the provision of the groove 10 and the two grooves 12 on the outer periphery of the rotor iron core 7 or by the provision of the hole 11 in the rotor iron core, the cogging torque is generated to negate the cogging torque which is generated according to the magnetic fluctuation between the magnetic field of the permanent magnets 8 and a stator 1. As a result, the cogging toque in a whole permanent magnet type rotary machine is reduced.

Abstract: In order to realize a permanent magnet dynamo electric machine which permits a high speed rotation, the permanent magnet dynamo electric machine including a stator 20 having a stator iron core 22 in which a stator winding 24 is wound, and a rotor 30 facing the inner circumference of the stator 20 and rotatably supported thereby, the rotor 30 having a rotor iron core 32 and a plurality of permanent magnets 36 arranged inside the rotor iron core 32 so as to face the stator iron core 22, wherein the rotor iron core 32 is provided with the same number of permanent magnet insertion holes 34 as the plurality of permanent magnets 36 for receiving the same at positions where ratio R1/R0 is equal to or more than 0.85, wherein R0 is the radius of the rotor 30 and R1 is the radius of an imaginary circle drawn by inscribing the faces of the plurality of permanent magnets 36 at the side remote from the stator 20.

Abstract: At least one groove and two grooves extending toward an axial direction of a rotor and is provided on an outer periphery of a rotor iron core or at least one hole is provided in the rotor iron core. By providing the groove and the two grooves on the outer periphery of the rotor iron core or by providing the hole in the rotor iron core, cogging torque is generated to negate the cogging torque which is generated according to the magnetic fluctuation between the magnetic field of the permanent magnets and a stator. As a result, the overall cogging toque in a permanent magnet type rotary machine is reduced.

Abstract: A magnetic gap is provided between permanent magnet of a rotor and an auxiliary magnetic pole portion which is adjacently arranged to the permanent magnet to a peripheral direction. A change in a magnetic flux density distribution of a surface of the rotor is performed moderately 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.

Abstract: A permanent magnet dynamoelectric rotating machine comprises a stator provided with windings; and a rotor disposed with an air gap between the stator and the rotor, and provided with a plurality of permanent magnets arranged along the circumference of the rotor and fixed to the rotor. The circumferential length of a surface of each permanent magnet facing the stator is determined so that an induced voltage has a waveform approximate to a sinusoidal waveform to suppress the peak of the induced voltage.

Abstract: 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.

Abstract: An electrically driven motor vehicle having mechanism including a permanent magnet dynamo electric machine which permits high speed of rotation. The permanent magnet dynamo electric machine includes a stator having a stator iron core in which a stator winding is wound, and a rotor facing the inner circumference of the stator and rotatably supported thereby. The rotor has a rotor iron core and a number of permanent magnets arranged in a ring inside the rotor iron core. The rotor iron core is provided with a number of permanent magnet insertion holes equal to the number of permanent magnets so as to position the permanent magnets at positions at which the ratio R1/R0 is equal to or more than 0.85, where R0 is the radius of the rotor and R1 is the radius of an imaginary circle drawn by inscribing the faces of the permanent magnets at the side thereof remote from the stator.

Abstract: A permanent magnet electric machine comprises a stator provided with windings and a rotor disposed with an air gap between the stator and the rotor. A plurality of permanent magnets are arranged along and fixed to the circumference of the rotor. The angular circumferential extent of a surface of each permanent magnet facing the stator is determined so that an induced voltage in the machine has a waveform that approximates a sinusoidal waveform, to suppress the peak of the induced voltage.

Abstract: A rotating electric machine comprises a stator having stator salient poles, three-phases windings wound around said stator salient poles, a rotor rotatable held inside the said stator, and permanent magnets inserted into said rotor and positioned opposite to said stator salient poles, wherein said three-phase windings are concentratively wound around each of said stator salient poles, said windings of each phase are wound around at more than one stator salient pole, and said windings of each phase have a phase difference of voltage between at least one of the windings and the other.

Abstract: A permanent magnet type dynamoelectric machine for driving a motor vehicle has a stator with a stator iron core and a rotor with a rotor iron core facing the stator iron core through an air gap permitting rotation of the rotor. A plurality of permanent magnets are embedded along the circumference of the rotor iron core. The mechanical angle .theta. formed about an axial center by the outer circumferential width of a side of each of the permanent magnets which face the stator is set to,.theta.=n.times..tau..sub.s +16/Pwherein .tau..sub.s is the slot pitch of the stator 1 in mechanical angle, P is number of poles of the dynamoelectric machine and n is an integer.

Abstract: In order to realize a permanent magnet dynamo electric machine which permits a high speed of rotation, the permanent magnet dynamo electric machine includes a stator 20 having a stator iron core 22 in which a stator winding 24 is wound, and a rotor 30 facing the inner circumference of the stator 20 and rotatably supported thereby, the rotor 30 having a rotor iron core 32 and a plurality of permanent magnets 36 arranged inside the rotor iron core 32 so as to face the stator iron core 22, wherein the rotor iron core 32 is provided with the same number of permanent magnet insertion holes 34 as the number of permanent magnets 36 for receiving the same at positions where the ratio R1/R0 is equal to or more than 0.85, wherein R0 is the radius of the rotor 30 and R1 is the radius of an imaginary circle drawn by inscribing the faces of the plurality of permanent magnets 36 at the side remote from the stator 20.