KR19980066660U - Rotor of permanent magnet motor - Google Patents

Abstract

The present invention forms one pole by adjoining two or more adjacent permanent magnets that emit isotropic magnetic flux with the same round type as the curvature of the rotor, and by forming two poles by adjoining two or more with the opposite polarity. The present invention relates to a rotor of a permanent magnet motor in which the magnetic flux of an isotropic permanent magnet is alternately magnetized by alternating magnetization on the circumference of the electron to increase the efficiency of the motor.

According to the present invention, there is provided a laminated core having a plurality of circular steel plates having a long hole-shaped opening hole having a predetermined curvature, and a permanent magnet inserted corresponding to the shape of the curved opening hole formed in the laminated core. In the rotor of the permanent magnet type motor, the curved opening hole is characterized in that the permanent magnet piece is divided into two or more having the same polarity.

Description

Rotor of permanent magnet motor

The present invention relates to a rotor of a permanent magnet type electric motor, and more particularly, two or more adjacent permanent magnets emitting isotropic magnetic fluxes in the same round type as the curvature of the rotor to form a pole, and are opposed to the polarity. A rotor of a permanent magnet type motor in which the magnetic flux of an isotropic permanent magnet is changed in the radial direction to increase the efficiency of the motor by alternately magnetizing two or more adjacent ones having a polarity to form one pole. will be.

In general, as a driving device for generating a predetermined motive force in all industries and electrical fields, such as most home appliances, industrial appliances, a motor driven by electricity that can be easily obtained anywhere is used.

As one of such driving devices, the motor which has established its position firmly has a peculiar structure depending on the purpose of its structure and characteristics. Recently, the DCBL motor (DC BrushLess motor) has an armature winding formed. It is formed of a stator and a rotor that rotates inside the stator, so that the structure is simple, high performance, light and small and short, and the rapid development is in progress.

The type and shape of the rotor of such a motor may also be various, but as an example, the DCBL motor will be described with reference to FIG. 1.

The DCBL motor is generally composed of a stator (not shown) in which a coil, which is an armature winding to which DC power is applied, is formed, a rotor 100 rotatably inserted inside the stator, and other circuit devices.

Of these, the rotor 100 is inserted into the laminated core 20 with a curved round permanent magnet 10 having a predetermined curvature for generating suction and repulsion in response to the magnetic flux generated by the stator coil. In order to prevent the round permanent magnet 10 inserted into the stacked core 20 from being separated from the outside, both ends of the stacked core 20 are closely contacted by the release preventing cover 30. The prevention cover 30 is again fixed by the fixing bolt 40.

Such a conventional round permanent magnet 10 is an isotropic permanent magnet 10a that radiates magnetic flux in the same direction irrespective of the curvature of the permanent magnet, as shown in FIG. 2, and as shown in FIG. A radial permanent magnet 10b having a magnetic flux in a radial (or approximate radial) direction in a form radiated from the center O of the electron 100 in the circumferential direction of the rotor 100 is used.

However, as the direction of the magnetic flux B and the current i generated by the isotropic permanent magnet 10a or the radial permanent magnet 10b attached to the rotor 100 is closer to the right angle, the torque (torque; F) increases, but in the case of the conventional isotropic permanent magnet 10a, the change in the direction of the magnetic flux B and the current i increases with the rotation of the rotor 100, and in the case of the radial permanent magnet 10b There is a problem in manufacturing technology, and in the process of magnetizing the laminated core, the magnetic flux direction is changed to the shape of the isotropic permanent magnet 10a in spite of the radial permanent magnet 10b, and the efficiency is halved.

Therefore, the present invention has been devised in view of such a conventional problem, and an object of the present invention is to magnetize the magnetic flux of the isotropic permanent magnet by magnetizing the rotor in a state in which two or more divided isotropic round permanent magnets are in close proximity. By providing a magnetic flux, it is to provide a rotor of a permanent magnet electric motor to increase the efficiency of the motor by increasing the repulsive force and suction force of the permanent magnet.

1 is an exploded perspective view showing a rotor of a conventional permanent magnet motor as an example.

Figure 2 is a view showing the magnetic flux by the rotor of the conventional isotropic permanent magnet motor.

Figure 3 is a view showing the magnetic flux by the rotor of the conventional radial permanent magnet motor.

Figure 4 is a perspective view showing a unit laminated core of the rotor according to the present invention.

Figure 5 is a cross-sectional view showing a rotor and the stator of the permanent magnet motor according to the present invention in one embodiment.

Figure 6 is a magnetic force diagram showing the radial magnetic flux by the rotor of the permanent magnet motor according to the present invention.

Explanation of symbols for the main parts of the drawings

200: stacked unit core 300: stacked core

400: rotor 500: armature winding

600: stator

The rotor of the permanent magnet motor for achieving the object of the present invention is a laminated core formed by laminating a plurality of circular steel sheet having an aperture hole of a long hole shape having a predetermined curvature;

In the rotor of the permanent magnet type electric motor including a permanent magnet inserted corresponding to the shape of the curved opening hole formed in the laminated core,

The curved opening is characterized in that the permanent magnet piece having the same polarity and divided into two or more are inserted.

Hereinafter, with reference to the accompanying drawings an embodiment of the rotor of the permanent magnet type motor of the present invention will be described.

Figure 4 is a perspective view showing a laminated unit core for inserting the permanent magnet of the rotor of the permanent magnet motor according to the present invention.

The laminated unit core 200 forming the rotor has a thin disc shape, and a rotation shaft hole 210 having a predetermined diameter is formed in the center of the disc, and a bolt is formed on the circumference of the disc spaced apart from the rotation shaft hole 210 by a predetermined interval. A fastening hole 220 is formed, and four long holes 230 having an arc shape having the same curvature as the curvature of the disc are formed continuously outside the bolt fastening hole 220.

FIG. 5 illustrates a stack of a plurality of stacked unit cores 200, and includes a cylindrical core 300 having a cylindrical shape, a permanent magnet insert formed by an arc-shaped hole 230, and a permanent magnet inserted into the permanent magnet insert. The rotor 400 formed of a magnet is inserted again inside the stator 600 in which the armature winding 500 is installed, where the arrow symbol is a plan view showing the direction of magnetic flux.

Two isotropic permanent magnets 320b are inserted into the first permanent magnet insert portion A of the arc-shaped permanent magnet insert portions formed by four places on the rotor 400, and the two isotropic permanent magnets 320b are inserted therein. ) Is the N pole that emits magnetic flux, and the direction of the magnetic flux emitted from the isotropic permanent magnet divided into two is diverged to the outside of the rotor 400 to form a closed loop flowing into the rotor 400. That is, it has a radial direction.

Thus, in order for the isotropic permanent magnet 320b to have a radial direction, a conventional isotropic permanent magnet is divided into two or more, and the magnetic flux direction of each divided isotropic permanent magnet 320b is the rotor 400. It must face toward the center of.

In addition, two isotropic permanent magnets 320c are inserted into contact with the second permanent magnet insert portion B adjacent to the first permanent magnet insert portion A, and the two isotropic permanent magnets are divided into two. 320c has an S pole, so that the magnetic flux emitted from the isotropic permanent magnet 320b of the first permanent magnet insert portion A enters the isotropic permanent magnet 320c of the second permanent magnet insert portion B. To form a closed loop.

The third permanent magnet insert portion C facing the first permanent magnet insert portion A configured as described above has an isotropic permanent magnet having two identical polarities divided in the same manner as the first permanent magnet insert portion A. 320d) is inserted, and the polarity of the third permanent magnet insert portion C has N polarity.

Similarly, in the fourth permanent magnet insert portion D facing the second permanent magnet insert portion B, an isotropic permanent magnet 320e having two identical polarities divided in the same manner as the second permanent magnet insert portion B is disposed. ) Is inserted, and the polarity of the fourth permanent magnet insert portion D has an S polarity.

When described with reference to the accompanying drawings, the rotor action of the permanent magnet type electric motor of the present invention is configured as follows.

Referring to Figure 6, the permanent magnet motor according to the present invention is the armature winding 500 and the repulsive force of the magnetic flux emitted from the isotropic permanent magnets 320a, 320b, 320c, 320d divided into two by the present invention And the rotor 400 of the present invention is rotated at a predetermined speed by the suction force, where the F is generated by the direction of the current (i) of the armature winding and the direction of the magnetic flux (B). Due to the left-hand law of, the force (F) is greatest when the direction of current and magnetic flux is 90 °, which means that the magnetic flux (B) is always approximate to the current (i) even if the rotor (400) rotates. 90 °, the void flux density is increased, so that the rotor is rotated at a predetermined speed by the repulsive force and the suction force with the magnetic flux generated in the armature winding of the stator 600.

As described in detail above, the magnetic flux direction of the permanent magnet having an equilateral structure while maintaining the existing number of poles is divided into two or more so that the direction of the rotor toward the center of the rotor, and then magnetized the rotor to the direction of the magnetic flux The radial direction increases the suction force and the repulsive force of the magnetic flux in the radial direction and the armature winding coil of the stator, thereby increasing the rotational torque and increasing the efficiency of the motor.

Claims (1)

A lamination core formed by laminating a plurality of circular steel sheets having opening holes having a long hole shape having a predetermined curvature; In the rotor of the permanent magnet type electric motor including a permanent magnet inserted corresponding to the shape of the curved opening hole formed in the laminated core, The rotor of the permanent magnet type motor, characterized in that the curved opening hole is inserted into two or more permanent magnet pieces having the same polarity.