KR20070100995A - Rotor of line start permanent magnet synchronous motor - Google Patents

Abstract

A rotor of a line start permanent magnet synchronous motor is provided to protect a mechanical detachment of the rotor by having a desired intensity by a core intensity reinforcing rivet. A rotor of a line start permanent magnet synchronous motor includes a core member(1), a rotor induction bar(2), a plurality of permanent magnets(3), a shaft(4), a rivet(5) of a non-magnetic body, an intensity reinforcing rivet(6), and a permanent magnet fixing cover. The rivet(5) of the non-magnetic body divides a rotor core magnetically. The rotor core member(1) is fixed by the rivet(5) of the non-magnetic body, the intensity reinforcing rivet(6), and the permanent magnet fixing cover. The non-magnetic body is fixed for a self division so that an injection material is not injected into an insertion unit of the permanent magnet(3) in die-casting of the rotor.

Description

Rotor of Line Start Permanent Magnet Synchronous Motor

1 is a configuration diagram of a conventional V-shaped line start permanent magnet synchronous motor rotor

Figure 2 is a configuration diagram of a conventional straight line start permanent magnet synchronous motor rotor

3 is a cross-sectional view of the core of the V-shaped line start permanent magnet synchronous motor rotor according to the present invention

4 is a cross-sectional view of the V-shaped line start permanent magnet synchronous motor rotor according to the present invention

5 is an exploded perspective view of the V-shaped line start permanent magnet synchronous motor rotor according to the present invention

6 is a perspective view of the combination of the V-shaped line start permanent magnet synchronous motor rotor according to the present invention

7 is a combined front view of the V-shaped line start permanent magnet synchronous motor rotor according to the present invention.

Explanation of symbols on the main parts of the drawings

1: core member

2: rotor guide bar

3: permanent magnet

4: shaft

5: rivet for magnetic block

6: rivet for strength correction

7: permanent magnet fixing cover

8: end ring

The present invention relates to a line start permanent magnet synchronous motor, and more particularly, to improve the efficiency and power factor by removing the leakage flux through the core link of the rotor, to enable aluminum die casting of the rotor, and to improve the mechanical strength The present invention relates to a line start permanent magnet synchronous motor capable of being driven directly with commercial power as an input power source having a higher rotor.

Line Start Permanent Magnet Synchronous Motor is a motor that combines induction motor and permanent magnet synchronous motor. It has the advantage of higher efficiency than

1 is a longitudinal sectional view of a conventional V-shaped line start permanent magnet synchronous motor rotor. As shown in the figure, it is composed of a laminated rotor core member, a rotor guide bar, a plurality of permanent magnets, and a shaft. In this case, the magnetic flux caused by the permanent magnet does not flow to the stator due to the core link part, but the leakage magnetic flux is increased and the coercive force is lowered to decrease the efficiency of the electric motor. In addition, in order to prevent such leakage magnetic flux, when the core link portion is made small, the injection material is introduced into the permanent magnet insert during die casting, and the rotor is separated or damaged by the centrifugal force acting in the radial direction during rotation.

Accordingly, an object of the present invention is to increase the leakage magnetic flux and decrease the power factor due to the core link portion serving as a support for protecting the separation of the permanent magnet from the centrifugal force during rotation and preventing the aluminum from flowing into the permanent magnet insert during die casting In order to solve the problem, it is to provide a rotor of a high efficiency line start permanent magnet synchronous motor that removes the rotor core link and fixes mechanically rigid non-magnetic rivets to enable aluminum die casting.

The object is, according to the invention, as shown in the figure, a laminated rotor core member 1, a rotor guide bar 2, a plurality of permanent magnets 3, a shaft 4 and And a magnetic split fixed rivet 5 and a fixed strength rivet 6 for strength correction. Magnetic split fixing rivet (5) is effective to use a non-magnetic material that can block the leakage magnetic flux. In addition, the fixed rivet 6 for strength correction may have a mechanical strength, it is preferable to use a magnetic material.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

1 is a cross-sectional view of a conventional V-shaped line start permanent magnet synchronous motor rotor, Figure 2 is a cross-sectional view of a conventional straight line start permanent magnet synchronous motor rotor. As shown in these figures, in the rotor of the conventional line start permanent magnet synchronous motor, the core link portion 17 is necessarily present between the permanent magnet insertion portion 13 and the rotor guide bar groove 12. The leakage magnetic flux flows through the core link portion 17 to reduce the coercive force of the line start permanent magnet synchronous motor, thereby reducing the efficiency and power factor. In addition, when the core link portion 17 is small, the mechanical strength of the rotor is reduced by the centrifugal force acting in the radial direction during the rotation of the rotor.

3 is a cross-sectional view of the V-shaped permanent magnet synchronous motor rotor core according to an embodiment of the present invention, Figure 4 is a cross-sectional view of the V-shaped permanent magnet synchronous motor rotor core member according to an embodiment of the present invention, 5 is an exploded perspective view of a V-shaped permanent magnet synchronous motor according to an embodiment of the present invention. 6 is a perspective view of the combination of the V-shaped permanent magnet synchronous motor according to an embodiment of the present invention, Figure 7 is a front view of the V-shaped permanent magnet synchronous motor according to an embodiment of the present invention;

Core member (1) formed by stacking a plurality of cores, rotor guide bar (2), permanent magnet (3), shaft (4), magnetic splitting nonmagnetic rivet (5), magnetic strength correction It is comprised as the rivet 6, the permanent magnet fixing cover 7, and the end ring 8. As shown in FIG.

The core member 1 is a rotor iron core having a general structure manufactured by laminating silicon steel sheets, and forms a circular groove 14 in which a shaft 4 is fixed at the center of the rotor core 11 illustrated in FIG. 3. A rotor guide bar groove 12 in which a plurality of diagonal magnet embedding grooves 13 in a diagonal direction with respect to the circular groove 14 and a rotor guide bar 2 made of aluminum or copper are located on the outside thereof; It is preferable to constitute a strength correction rivet groove 16 for reinforcing sufficient mechanical strength from centrifugal force generated during rotation. Here, the end of the permanent magnet embedded groove 13 and the outer rotor guide bar groove 12 is connected to the connection portion is a rivet groove 15 that can fix the rivet of the non-magnetic material is located.

In this case, the permanent magnet (3) is preferably inserted into the N-pole and S-pole permanent magnet alternately from the inner side to the outer side in the case of the straight line start permanent magnet synchronous motor. In the case of the V-shaped line start permanent magnet synchronous motor, two permanent magnets are formed in a pair, and the N pole and the S pole are alternately inserted from the inside to the outside.

At this time, the magnetic split rivet (5) is a nonmagnetic material for blocking the leakage magnetic flux is effective in the configuration of a circular or polygonal, the strength reinforcing rivet (6) is sufficient to prevent the rotor from being separated from the centrifugal force during rotation It is desirable to use a material that can have mechanical strength.

 As described above, according to the present invention, the leakage magnetic flux through the core link portion of the rotor can be blocked to reconsider the efficiency and power factor of the line start permanent magnet synchronous motor, to enable aluminum die casting of the rotor, and to provide core strength. Reinforcing rivets provide sufficient strength, providing a line start permanent magnet synchronous motor that can be mechanically protected from breakage and burnout of the rotor.

Claims (4)

     The core member 1, the rotor guide bar 2, a plurality of permanent magnets 3, a shaft 4, a non-magnetic rivet 5 for magnetic division of the rotor core, A line start permanent magnet synchronous motor, characterized in that the rotor core member (1) is fixed using a strength reinforcing rivet (6) and a permanent magnet fixing cover (7).        The line start permanent magnet synchronous motor rotor according to claim 1, wherein the non-magnetic material for magnetic separation is fixed to prevent the injection of the injection into the permanent magnet insert during die casting of the rotor.        2. The line start permanent magnet synchronous motor rotor according to claim 1, having a core composed of a magnetic dividing hole (15) between the rotor bar and the permanent magnet insert to increase efficiency and power factor.        The line start permanent magnet synchronous motor rotor according to claim 1, wherein the core is fixed by using a reinforcing rivet (6) for reinforcing the mechanical strength of the rotor.

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