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Permanent magnet motor and its magnetization method

A technology of permanent magnet motors and magnets, which is applied in the direction of magnetic circuit rotating parts, magnetic circuit shape/style/structure, manufacturing stator/rotor body, etc., and can solve problems such as cost increase and motor coil influence

Active Publication Date: 2018-02-16
SUMITOMO HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] If a dedicated yoke is used, the magnets can be magnetized efficiently. However, when manufacturing a small amount of multi-variety motors, it is necessary to prepare yokes separately according to the specifications of different types of rotors, which increases the cost.
On the other hand, when magnetizing the motor coil of the stator, which is an indispensable structure of the motor, it is possible to cope with low-volume and high-variety manufacturing, but it is necessary to flow a large current required for magnetization, which may affect the motor coil

Method used

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  • Permanent magnet motor and its magnetization method
  • Permanent magnet motor and its magnetization method
  • Permanent magnet motor and its magnetization method

Examples

Experimental program
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Effect test

Deformed example 1

[0057] Figure 7 It is a figure which shows the mounting method of the magnetization coil 60 which concerns on the modification 1. FIG. In the above-mentioned embodiment, the magnetizing coil 60 is fixed to the two through holes 40 a and 40 b , but in Modification 1, the magnetizing coil 60 is fixed by using one through hole 40 a and the concave portion 56 . The concave portion 56 is formed by the outer peripheral surface 24 of the rotor 20 and the side surface of the magnet member 50 protruding from the outer peripheral surface 24 . At this time, the magnetizing coil 60 is fixed such that the first side surface 52 of the magnet member 50 crosses the plane formed by the loop of the magnetizing coil 60 . Thus, even if the magnetization coil 60 is fixed by the combination of the through-hole 40 and the recessed part 56, the magnetization coil 60 can be fixed so that it may surround the outer periphery of the magnet member 50. FIG.

[0058] Also, if the angle at which the first...

Deformed example 2

[0060] Figure 8 It is a figure which shows the mounting method of the coil for magnetization which concerns on the modification 2. Similar to Modification 1, the magnetization coil 60a is mounted using the concave portion 56a located on the right side of the first magnet member 50a and the through hole 40a located on the left side of the first magnet member 50a. In Modification 2, In addition to the above, another magnetizing coil 60b is installed. The other coil 60b for magnetization is attached using the recess 56b located on the left side of the drawing of the first magnet member 50a and the through-hole 40b located on the right side of the drawing of the first magnet member 50a. Therefore, in Modification 2, two magnetization coils 60 are attached to one magnet member 50 , and each magnetization coil 60 is attached so as to intersect on the upper surface and the lower surface of the rotor 20 .

[0061] By attaching the two magnetizing coils 60 intersecting as described ...

Deformed example 3

[0063] Figure 9 It is a plan view showing a state in which the magnetizing coil 60 is attached to the rotor 20 according to Modification 3. FIG. Modification 3 differs from the above-described embodiment in that the cross-section of the through-hole 40 is an anisotropic substantially elliptical shape instead of an isotropic circular shape. The cross-section of the through hole 40 has a circumferential width W 2 than the width W in the radial direction from the center of the rotor 20 toward the outer circumference 1 Wide anisotropic shape. For example, in the cross section of the through hole 40, the radial width W 1 Corresponding to the thickness of one magnetizing coil 60, the circumferential width W 2 This corresponds to the thickness of the two coils 60 for magnetization. Thereby, two coils 60 for magnetization can be spaced and inserted in one through-hole 40 along the circumferential direction.

[0064]In Modification 3, by making the cross-section of the through-h...

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Abstract

The present invention provides a permanent magnet motor and a method of magnetizing the same that suppress cost increase and improve magnetization efficiency. The permanent magnet motor (100) of the present invention includes a rotor (20). The rotor (20) has a plurality of magnet parts, and slots or holes extending from the upper surface to the lower surface of the rotor (20). A plurality of magnet members (50) are arranged in a circumferential direction along the outer circumference of the rotor (20). The slots or holes are provided corresponding to the positions between adjacent magnet parts (50). The cross-sectional shape of the slot or hole is anisotropic. The permanent magnet motor (100) may also have coils laid along the slots or holes.

Description

[0001] This application claims priority based on Japanese Patent Application No. 2013-144911 filed on July 10, 2013. The entire contents of this Japanese application are incorporated herein by reference. technical field [0002] The invention relates to a permanent magnet motor, in particular to a magnetization technology of a magnet arranged on a rotor. Background technique [0003] An induction motor or a permanent magnet motor is used as a driving force for industrial equipment and the like. Since the permanent magnet motor utilizes the magnetic force generated by the permanent magnet provided on the rotor, there is no loss caused by the current flowing through the coil provided on the rotor like the induction motor, and the efficiency can be easily improved. In addition, the permanent magnet motor can realize a high-power and compact motor by using a magnet with strong magnetic force including rare earth elements such as neodymium. [0004] Usually, magnetic materials ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27H02K15/03
Inventor 中崎修
Owner SUMITOMO HEAVY IND LTD