JPS62147937A - Magnetizer for permanent magnet type magnetic pole - Google Patents

Abstract

PURPOSE:To facilitate the winding insertion work of a revolving electric machine by forming a skewed magnetic pole to a permanent magnet by a magnetizer. CONSTITUTION:Pole cores 7 skewed in the circumferential direction only by one groove section in grooves for inserting a winding 6 for a stator core 5 are protruded equally on the inner circumference of a cylindrical magnetized core 4 only by the number of poles. A permanent magnet 2 consisting of rare earth metals, ferrite, etc. is fixed and fitted onto the outer circumference of a cylindrical yoke 11 engaged with a shaft 10 in a rotor 1, the rotor 1 is inserted into a magnetizer 3 under the state, and voltage is applied to a magnetizing coil 8 to magnetize the permanent magnet 2, thus shaping magnetic poles skewed in the circumferential direction in response to the pole cores 7. Accordingly, the magnetic flux density of an air gap section between the rotor 1 and a stator 12 can be equalized in the circumferential direction without skewing the grooves for inserting the winding 6 for the stator core 5, thus facilitating the insertion work of the winding 6, then reducing electromagnetic noises.

Description

[Detailed description of the invention] (Technical field to which the invention pertains) In a rotating 1#h electric machine, if the magnetic flux density in the gap between the rotor and stator is not uniform in the circumferential direction, the current will pulsate as it rotates. This generates electromagnetic noise.

This invention is a magnetizing device for a permanent magnet type magnetic pole of a rotating electric machine, in which the permanent magnets of the rotor or stator can be magnetized with a clever structure so that the magnetic flux density in the gap becomes uniform in the circumferential direction. Concerning what was done.

[Prior art and its problems]

In rotating electric machines in which permanent magnet magnetic poles are provided in the rotor or stator, the winding insertion grooves of the stator core or rotor core are generally skewed excessively in the circumferential direction to prevent air gaps between the rotor and stator. However, in such a ttltm, the skew reduces the cross-sectional area of the groove, making it difficult to insert the winding.

[Purpose of the invention]

In order to eliminate the above-mentioned drawbacks, the present invention has developed a rotating system in which the permanent magnets of the rotor or stator can be magnetized with a clever structure so that the magnetic flux density in the air gap becomes uniform in the circumferential direction. The purpose of the present invention is to provide a magnetizing device for a permanent magnet type magnetic pole of an electric machine.

[Key points of the invention]

In order to achieve the above object, the present invention provides a wt magnetic pole core which is skewed in the circumferential direction on one circumference or the outer circumference of a cylindrical magnetized core, and a magnetized coil is wound around this magnetic pole core to generate a rotor. Alternatively, the permanent magnet of the stator is magnetized.

[Embodiments of the invention]

FIG. 1 shows an embodiment of the invention.

This figure shows a magnetizing device 3 for a permanent magnet 2 of a rotor l, and a third groove is formed on the inner periphery of a cylindrical celadon core 4 by a groove for inserting a winding 6 of a stator core 5 shown in FIG. As shown in the figure, a circumferentially skewed magnetic pole core 7 is equally protruded by hundreds of millions of points, and a celadon coil 8 is wound around the magnetic pole core 7. The celadon coils 8 for each axis are connected in series, and voltage is applied by a DC power supply 9. The rotor l has a rare earth metal,
A permanent magnet 2 made of ferrite or the like is attached with adhesive or the like, and in this state the magnetization device f! When the permanent magnet 2 is inserted into the permanent magnet 18 and a voltage is applied to the magnetizing coil 8 to magnetize the permanent magnet 2, a &B pole skewed in the circumferential direction corresponding to the magnetic pole iron core 7 is formed.

According to the above embodiment, the magnetizing device 3 forms skewed magnetic poles on the permanent magnet 2, so that the air gap between the rotor 1 and the stator 12 is reduced without skewing the groove for inserting the winding 6 of the stator core 5. The magnetic flux density of the section can be made uniform in the circumferential direction, thereby making it easier to insert the winding 6 and reducing electromagnetic noise caused by current pulsation.

In the above embodiment, the case where the permanent magnets 2 of the rotor 1 are magnetized has been explained, but even when permanent magnets are provided on the circumference of the stator and magnetized, the magnetic pole cores skewed on the outer periphery of the cylindrical magnetized core are used. It can be implemented by setting up.

〔Effect of the invention〕

According to the present invention, in a magnetizing device for a permanent magnet type magnetic pole of a rotating electrical machine, a magnetic pole iron core that is skewed in the circumferential direction is provided protruding from the circumference or outer periphery of a cylindrical S magnetic core, and a magnetizing coil is attached to this magnetic pole iron core. Since the permanent magnets of the rotor or stator are wound to form skewed magnetic poles, it is possible to easily insert the windings into the rotating electric machine and to reduce electromagnetic noise.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of a rotor magnetized by the magnetizing device of the present invention, and FIG. 3 is a front view of an embodiment of the invention.
It is a perspective view of the magnetic pole iron core part seen from P top direction of a figure. 2... Permanent magnet, 3... Magnetizing device, 4... Celadon core, 7... Magnetic pole core, 8... Magnetizing coil, 11...
・Yoke. :LJt ;', ;i-,-2, 4. jJ 'L
＃・IQ6)=.ゝ9 Figure 1] O Figure 2

Claims (1)

[Claims] 1) In a magnetizing device that forms a magnetic pole by magnetizing a permanent magnet fixed to the outer or inner circumference of a cylindrical yoke, a magnetic pole iron core that is skewed in the circumferential direction on the circumference or outer periphery of a cylindrical magnetized iron core is used. A magnetizing device for a permanent magnet type magnetic pole, characterized in that a magnetizing coil is wound around the magnetic pole iron core.