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Permanent magnet for motor, and method for manufacturing the permanent magnet for motor

一种永久磁铁、制造方法的技术，应用在电动机用永久磁铁及电动机用永久磁铁的制造领域，能够解决矫顽力下降、下降等问题，达到减小涡电流、简化制造工序的效果

Inactive Publication Date: 2011-02-16
NITTO DENKO CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when the temperature of the permanent magnet increases, the coercive force decreases, so the motor torque also decreases

Method used

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  • Permanent magnet for motor, and method for manufacturing the permanent magnet for motor
  • Permanent magnet for motor, and method for manufacturing the permanent magnet for motor
  • Permanent magnet for motor, and method for manufacturing the permanent magnet for motor

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Embodiment Construction

[0089] Hereinafter, a specific embodiment of the permanent magnet for electric motor and the method for manufacturing the permanent magnet for electric motor according to the present invention will be described in detail with reference to the drawings. First, based on figure 1 The structure of the permanent magnet motor 2 in which the permanent magnet 1 of this embodiment is embedded is demonstrated. figure 1 It is a figure which shows the internal structure of the permanent magnet motor 2 which concerns on embodiment of this invention.

[0090] Such as figure 1 As shown, the permanent magnet motor 2 is basically composed of a stator 3 and a rotor 4 rotatably arranged inside the stator 3 .

[0091] First, the stator 3 will be described. The stator 3 is composed of a stator core 11 and a plurality of stator coils 12 wound around the stator core 11 . In addition, a predetermined number of stator coils 12 are arranged at equal intervals on the inner peripheral surface of th...

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PUM

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Abstract

Provided is a permanent magnet to be buried in a permanent magnet motor. The permanent magnet is constituted to comprise a plurality of sheet magnets to be laminated, and insulating layers arranged between the laminated sheet magnets. This constitution can provide a miniature motor of a high output, which can prevent the temperature rise of the permanent magnet and the reduction of a coercive force. Moreover, the conventional correcting work required after a sintering step can be eliminated to simplify the manufacturing process thereby molding the permanent magnet in a high sizing precision.

Description

technical field [0001] The present invention relates to a permanent magnet for a motor embedded in a permanent magnet motor and a method for manufacturing a permanent magnet for a motor. Background technique [0002] In recent years, permanent magnet motors used in hybrid vehicles, hard disk drives, etc. have been required to be smaller and lighter, higher in output, and higher in efficiency. Such a permanent magnet motor has a structure in which permanent magnets are embedded in the outer peripheral surface of the rotor and coils are arranged on the inner peripheral surface of the stator, as disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2007-306735 ). [0003] Furthermore, in order to achieve size reduction, weight reduction, high output, and high efficiency in the above-mentioned permanent magnet motor, it is required that the permanent magnets embedded in the permanent magnet motor have further improved magnetic characteristics. In addition, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/03H02K1/27H01F1/08
CPCH01F41/0266H01F1/0577H01F41/0293H01F10/126H01F1/0572H02K1/2766H02K15/03Y10T29/49009H01F1/08H02K1/27H02K15/00H02K21/00
Inventor 尾关出光久米克也中山纯一福田佑纪星野利信堀尾友和中村贤治
Owner NITTO DENKO CORP
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